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Nantucket 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Nantucket

Massachusetts, United States Of America

Long range weather outlook for Nantucket includes 14 day forecast summary:

The forecast for Nantucket in the coming two weeks is predicting the average daytime maximum temperature will be around 17°C, with a high for the two weeks of 23°C expected on the afternoon of Thursday 23rd. The mean minimum temperature will be 13°C, dipping to its lowest on the morning of Sunday 19th at 11°C. Expect the following 14 days ahead to have mixed overhead conditions with some days dry and some seeing a significant amount of rain. The current forecast indicates Saturday 18th will have the most precipitation with an accumulation of around 1.0mm. On the whole winds are likely to be moderate. Expect the strongest wind on the evening of Thursday 23rd, coming from a south westerly direction, and reaching around 26mph. The forecast suggests the maximum gusts will be on Friday morning.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 17
May		16:00

NE
NE

 24 / 27 mph 63 / 62°F 91% 1013 mb
Low level cloud: 34%
Mid level cloud: 13%
High level cloud: 2%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

 23 / 27 mph 59 / 59°F 91% 1014 mb
Low level cloud: 100%
Mid level cloud: 22%
High level cloud: 68%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 27 / 31 mph 56 / 51°F 91% 1013 mb
Low level cloud: 89%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May		01:00

NE
NE

 24 / 30 mph 53 / 47°F 94% 1013 mb
Low level cloud: 100%
Mid level cloud: 57%
High level cloud: 27%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

 24 / 34 mph 52 / 45°F 95% 1013 mb
Low level cloud: 100%
Mid level cloud: 45%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 24 / 33 mph 52 / 46°F 95% 1014 mb
Low level cloud: 100%
Mid level cloud: 84%
High level cloud: 78%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNE
NNE

 24 / 27 mph 55 / 49°F 96% 1014 mb
Low level cloud: 98%
Mid level cloud: 64%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNE
NNE

 22 / 25 mph 57 / 52°F 96% 1014 mb
Low level cloud: 100%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

 23 / 26 mph 57 / 53°F 96% 1014 mb
Low level cloud: 91%
Mid level cloud: 46%
High level cloud: 35%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNE
NNE

 21 / 24 mph 56 / 51°F 96% 1014 mb
Low level cloud: 93%
Mid level cloud: 69%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

 20 / 23 mph 54 / 49°F 95% 1014 mb
Low level cloud: 96%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May		01:00

NNE
NNE

 23 / 28 mph 53 / 47°F 94% 1014 mb
Low level cloud: 91%
Mid level cloud: 44%
High level cloud: 30%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

 22 / 30 mph 52 / 46°F 94% 1014 mb
Low level cloud: 95%
Mid level cloud: 51%
High level cloud: 18%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNE
NNE

 24 / 32 mph 52 / 45°F 94% 1014 mb
Low level cloud: 91%
Mid level cloud: 62%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNE
NNE

 21 / 25 mph 54 / 48°F 93% 1015 mb
Low level cloud: 100%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNE
NNE

 23 / 26 mph 56 / 50°F 92% 1015 mb
Low level cloud: 97%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

 22 / 26 mph 56 / 51°F 91% 1015 mb
Low level cloud: 87%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

 21 / 24 mph 55 / 49°F 92% 1016 mb
Low level cloud: 82%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 21 / 24 mph 53 / 48°F 93% 1016 mb
Low level cloud: 95%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		01:00

NE
NE

 19 / 22 mph 53 / 48°F 92% 1016 mb
Low level cloud: 91%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

 19 / 27 mph 52 / 47°F 92% 1016 mb
Low level cloud: 97%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 17 / 26 mph 52 / 47°F 91% 1017 mb
Low level cloud: 90%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

 18 / 21 mph 55 / 51°F 89% 1018 mb
Low level cloud: 89%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NE
NE

 17 / 20 mph 59 / 54°F 89% 1018 mb
Low level cloud: 31%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NE
NE

 15 / 18 mph 59 / 55°F 87% 1017 mb
Low level cloud: 18%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

 11 / 13 mph 57 / 54°F 89% 1017 mb
Low level cloud: 27%
Mid level cloud: 5%
High level cloud: 21%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 7 / 9 mph 55 / 53°F 87% 1017 mb
Low level cloud: 16%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May		01:00

ESE
ESE

 2 / 3 mph 55 / 56°F 87% 1016 mb
Low level cloud: 10%
Mid level cloud: 2%
High level cloud: 17%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

 4 / 5 mph 54 / 54°F 85% 1016 mb
Low level cloud: 12%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 2 / 3 mph 55 / 55°F 85% 1017 mb
Low level cloud: 8%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 7 / 8 mph 59 / 57°F 84% 1017 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 10 / 11 mph 63 / 62°F 84% 1017 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 12 / 14 mph 64 / 63°F 85% 1016 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 15 / 17 mph 61 / 60°F 88% 1016 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

 15 / 18 mph 57 / 53°F 89% 1017 mb
Low level cloud: 14%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May		01:00

SW
SW

 15 / 17 mph 58 / 55°F 90% 1016 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 16 / 24 mph 55 / 51°F 91% 1015 mb
Low level cloud: 14%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 17 / 27 mph 56 / 51°F 91% 1017 mb
Low level cloud: 8%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 19 / 22 mph 62 / 61°F 90% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 79%
Most Significant Cloud Type: high
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

 19 / 22 mph 66 / 65°F 89% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 15%
Most Significant Cloud Type: high
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

 19 / 21 mph 67 / 66°F 90% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

 17 / 20 mph 64 / 63°F 91% 1014 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

 21 / 38 mph 59 / 59°F 92% 1014 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May		01:00

SW
SW

 19 / 29 mph 61 / 61°F 92% 1013 mb
Low level cloud: 4%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 19 / 40 mph 58 / 55°F 94% 1012 mb
Low level cloud: 3%
Mid level cloud: 4%
High level cloud: 78%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 21 / 43 mph 59 / 55°F 95% 1013 mb
Low level cloud: 22%
Mid level cloud: 3%
High level cloud: 7%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 23 / 26 mph 67 / 66°F 98% 1012 mb
Low level cloud: 20%
Mid level cloud: 3%
High level cloud: 3%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 23 / 26 mph 73 / 77°F 98% 1010 mb
Low level cloud: 5%
Mid level cloud: 10%
High level cloud: 1%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 25 / 29 mph 74 / 77°F 91% 1008 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 28 / 32 mph 70 / 69°F 92% 1007 mb
Low level cloud: 11%
Mid level cloud: 13%
High level cloud: 19%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

 25 / 29 mph 64 / 64°F 95% 1007 mb
Low level cloud: 75%
Mid level cloud: 32%
High level cloud: 40%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 24
May		01:00

WNW
WNW

 11 / 24 mph 58 / 55°F 91% 1015 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
07:00

WSW
WSW

 17 / 36 mph 59 / 55°F 86% 1009 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
0.0 In
13:00

WSW
WSW

 15 / 31 mph 66 / 66°F 80% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
19:00

SSW
SSW

 8 / 14 mph 66 / 66°F 82% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sat 25
May		01:00

NE
NE

 19 / 29 mph 53 / 47°F 89% 1017 mb
Low level cloud: 93%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
07:00

NW
NW

 17 / 26 mph 55 / 51°F 70% 1010 mb
Low level cloud: 9%
Mid level cloud: 31%
High level cloud: 50%
Most Significant Cloud Type: medium
59%
0.0 In
13:00

WSW
WSW

 19 / 29 mph 60 / 60°F 76% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
19:00

WSW
WSW

 12 / 15 mph 60 / 60°F 68% 1020 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
Sun 26
May		01:00

WNW
WNW

 9 / 15 mph 58 / 56°F 67% 1018 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 71%
Most Significant Cloud Type: medium
9%
0.0 In
07:00

NNE
NNE

 17 / 25 mph 57 / 53°F 76% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 21%
Most Significant Cloud Type: high
21%
0.0 In
13:00

SSW
SSW

 8 / 13 mph 60 / 60°F 69% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
19:00

W
W

 4 / 5 mph 61 / 62°F 67% 1024 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
Mon 27
May		01:00

SSW
SSW

 13 / 22 mph 58 / 56°F 83% 1022 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 7%
Most Significant Cloud Type: medium
12%
0.0 In
07:00

NW
NW

 9 / 15 mph 59 / 57°F 73% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: high
7%
0.0 In
13:00

S
S

 27 / 43 mph 65 / 65°F 88% 1017 mb
Low level cloud: 98%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
19:00

SE
SE

 5 / 6 mph 66 / 66°F 68% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
0.0 In
Tue 28
May		01:00

SW
SW

 22 / 39 mph 58 / 54°F 98% 1010 mb
Low level cloud: 97%
Mid level cloud: 13%
High level cloud: 21%
Most Significant Cloud Type: low
100%
0.4 In
07:00

E
E

 12 / 24 mph 56 / 53°F 71% 1013 mb
Low level cloud: 3%
Mid level cloud: 42%
High level cloud: 38%
Most Significant Cloud Type: medium
51%
0.0 In
13:00

WSW
WSW

 16 / 29 mph 64 / 64°F 99% 1010 mb
Low level cloud: 23%
Mid level cloud: 46%
High level cloud: 6%
Most Significant Cloud Type: low
40%
0.0 In
19:00

NE
NE

 10 / 13 mph 60 / 60°F 93% 1014 mb
Low level cloud: 95%
Mid level cloud: 97%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Wed 29
May		01:00

N
N

 11 / 22 mph 60 / 60°F 81% 1014 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 79%
Most Significant Cloud Type: medium
46%
0.0 In
07:00

WNW
WNW

 3 / 4 mph 59 / 59°F 86% 1015 mb
Low level cloud: 14%
Mid level cloud: 3%
High level cloud: 5%
Most Significant Cloud Type: low
16%
0.0 In
13:00

ENE
ENE

 8 / 15 mph 64 / 64°F 68% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
19:00

SSW
SSW

 14 / 18 mph 61 / 61°F 87% 1014 mb
Low level cloud: 15%
Mid level cloud: 45%
High level cloud: 33%
Most Significant Cloud Type: medium
87%
0.0 In
Thu 30
May		01:00

SSE
SSE

 7 / 12 mph 59 / 59°F 70% 1019 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 20%
Most Significant Cloud Type: medium
46%
0.0 In
07:00

ESE
ESE

 10 / 16 mph 57 / 55°F 94% 1013 mb
Low level cloud: 39%
Mid level cloud: 60%
High level cloud: 100%
Most Significant Cloud Type: low
71%
0.2 In
13:00

ESE
ESE

 11 / 20 mph 63 / 63°F 68% 1018 mb
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 36%
Most Significant Cloud Type: medium
49%
0.0 In
19:00

NE
NE

 9 / 11 mph 60 / 60°F 96% 1011 mb
Low level cloud: 79%
Mid level cloud: 16%
High level cloud: 8%
Most Significant Cloud Type: low
85%
0.3 In
Fri 31
May		01:00

NE
NE

 29 / 52 mph 55 / 49°F 80% 1014 mb
Low level cloud: 100%
Mid level cloud: 87%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
07:00

SE
SE

 12 / 19 mph 54 / 51°F 98% 1012 mb
Low level cloud: 76%
Mid level cloud: 59%
High level cloud: 39%
Most Significant Cloud Type: low
100%
0.0 In
13:00

ENE
ENE

 30 / 54 mph 56 / 50°F 96% 1017 mb
Low level cloud: 100%
Mid level cloud: 57%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
19:00

S
S

 5 / 7 mph 60 / 60°F 95% 1011 mb
Low level cloud: 61%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
65%
0.0 In
Sat 01
Jun		01:00

E
E

 26 / 54 mph 55 / 49°F 97% 1018 mb
Low level cloud: 99%
Mid level cloud: 80%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
07:00

SSW
SSW

 14 / 25 mph 58 / 55°F 92% 1011 mb
Low level cloud: 51%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
54%
0.0 In
13:00

ENE
ENE

 36 / 75 mph 59 / 53°F 95% 1020 mb
Low level cloud: 100%
Mid level cloud: 94%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
19:00

SW
SW

 17 / 23 mph 62 / 62°F 87% 1011 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
4%
0.0 In

The day label given represents the local day relative to the local time for the location you are looking at.
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Day

This time is corrected for local time zones and where possible for daylight saving times.
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Local Time

The wind direction we use on this page is the direction the wind is coming from, given in a 16 point compass format.
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Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
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Speed/
Gust

Temperature from our forecast perspective are fairly well defined, they are what we would expect to measure in a standard meteorological screen (in other words, shaded and well ventilated) at 2 metres above ground level.
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Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
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Precip Amount

The total amount of cloud as a percentage is derived from looking at cloud cover throughout the atmosphere and estimating how these combine when looked at from the ground.
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Cloud Amount

Here we try to capture the feel of the weather as an image – it will never be perfect but is useful for a quick overview.
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Weather

When we measure for forecast air pressure we are normally doing this relative to a certain height and most commonly relative to Mean Sea Level.
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Pressure