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Marlborough 14 Day Long Range Forecast

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

Massachusetts, United States Of America

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

Reviewing the forecast for Marlborough Over the next 14 days and the average daytime maximum temperature will be around 25°C, with a high for the two weeks of 30°C expected on the afternoon of Saturday 6th. The average minimum temperature will be 12°C, dipping to its lowest on the morning of Saturday 13th at 7°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. It looks like Saturday 6th will have the most precipitation with an accumulation of around 7.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 04
Sep		01:00

SW
SW

 4 / 7 mph 58 / 58°F 93% 1013 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
04:00

SW
SW

 4 / 8 mph 55 / 55°F 97% 1013 mb
Low level cloud: 1%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

 3 / 5 mph 63 / 61°F 79% 1014 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 6 / 6 mph 76 / 77°F 50% 1013 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
13:00

S
S

 7 / 8 mph 82 / 79°F 36% 1011 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 10 / 13 mph 78 / 78°F 46% 1010 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 9 / 12 mph 69 / 67°F 73% 1012 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 7 / 11 mph 61 / 62°F 96% 1013 mb
Low level cloud: 58%
Mid level cloud: 21%
High level cloud: 100%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 05
Sep		19:00

S
S

 11 / 16 mph 75 / 77°F 73% 1015 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 10 / 14 mph 72 / 76°F 80% 1015 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 06
Sep		01:00

SSW
SSW

 9 / 14 mph 70 / 70°F 80% 1015 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 8 / 12 mph 69 / 69°F 80% 1015 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

 9 / 12 mph 73 / 76°F 80% 1015 mb
Low level cloud: 1%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 15 / 17 mph 84 / 85°F 51% 1014 mb
Low level cloud: 1%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 15 / 18 mph 86 / 89°F 49% 1012 mb
Low level cloud: 26%
Mid level cloud: 92%
High level cloud: 7%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 8 / 12 mph 74 / 78°F 89% 1014 mb
Low level cloud: 93%
Mid level cloud: 36%
High level cloud: 5%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

WNW
WNW

 4 / 7 mph 67 / 64°F 98% 1016 mb
Low level cloud: 22%
Mid level cloud: 45%
High level cloud: 31%
Most Significant Cloud Type: low
41%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

WNW
WNW

 4 / 7 mph 62 / 62°F 97% 1017 mb
Low level cloud: 35%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: low
56%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Sun 07
Sep		01:00

NW
NW

 7 / 12 mph 58 / 57°F 94% 1017 mb
Low level cloud: 11%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: medium
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

 4 / 6 mph 55 / 54°F 98% 1017 mb
Low level cloud: 81%
Mid level cloud: 70%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
07:00

NNE
NNE

 2 / 2 mph 54 / 54°F 97% 1018 mb
Low level cloud: 60%
Mid level cloud: 73%
High level cloud: 100%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NW
NW

 2 / 3 mph 62 / 60°F 81% 1018 mb
Low level cloud: 1%
Mid level cloud: 23%
High level cloud: 98%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

 4 / 6 mph 68 / 66°F 63% 1017 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 66%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 6 / 9 mph 74 / 76°F 52% 1016 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 20%
Most Significant Cloud Type: medium
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 5 / 9 mph 65 / 64°F 72% 1019 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 18%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 5 / 9 mph 60 / 60°F 67% 1021 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 08
Sep		01:00

W
W

 5 / 9 mph 56 / 56°F 73% 1022 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

 5 / 10 mph 53 / 52°F 76% 1023 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

 5 / 8 mph 58 / 56°F 64% 1024 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
10:00

WNW
WNW

 8 / 9 mph 70 / 68°F 36% 1025 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

 7 / 9 mph 74 / 74°F 32% 1024 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 8 / 10 mph 74 / 75°F 37% 1025 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

 5 / 6 mph 69 / 68°F 52% 1026 mb
Low level cloud: 0%
Mid level cloud: 1%
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

NNW
NNW

 4 / 7 mph 59 / 59°F 61% 1028 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 09
Sep		01:00

N
N

 4 / 7 mph 55 / 55°F 68% 1030 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

 4 / 8 mph 51 / 50°F 66% 1030 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
07:00

NNE
NNE

 5 / 8 mph 54 / 52°F 62% 1032 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
10:00

E
E

 6 / 8 mph 71 / 69°F 46% 1031 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
13:00

E
E

 7 / 8 mph 75 / 76°F 40% 1030 mb
Low level cloud: 5%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

E
E

 10 / 12 mph 72 / 76°F 52% 1029 mb
Low level cloud: 25%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ESE
ESE

 5 / 7 mph 64 / 62°F 76% 1030 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SE
SE

 2 / 3 mph 58 / 59°F 94% 1031 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
Wed 10
Sep		01:00

N
N

 2 / 3 mph 53 / 53°F 95% 1030 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
04:00

NNE
NNE

 2 / 5 mph 51 / 51°F 97% 1029 mb
Low level cloud: 9%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNE
NNE

 3 / 4 mph 56 / 55°F 89% 1029 mb
Low level cloud: 17%
Mid level cloud: 23%
High level cloud: 99%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ESE
ESE

 6 / 7 mph 69 / 68°F 54% 1027 mb
Low level cloud: 71%
Mid level cloud: 43%
High level cloud: 46%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

 4 / 6 mph 61 / 61°F 94% 1025 mb
Low level cloud: 99%
Mid level cloud: 99%
High level cloud: 85%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

NE
NE

 4 / 6 mph 61 / 60°F 99% 1023 mb
Low level cloud: 100%
Mid level cloud: 78%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

NNE
NNE

 4 / 6 mph 60 / 60°F 100% 1022 mb
Low level cloud: 99%
Mid level cloud: 55%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNW
NNW

 4 / 6 mph 60 / 60°F 99% 1021 mb
Low level cloud: 97%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 11
Sep		01:00

W
W

 4 / 8 mph 68 / 68°F 94% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

NNW
NNW

 3 / 5 mph 61 / 61°F 90% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

ENE
ENE

 9 / 12 mph 76 / 77°F 44% 1022 mb
Low level cloud: 28%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
31%
0.0 In
19:00

ENE
ENE

 4 / 5 mph 67 / 67°F 76% 1021 mb
Low level cloud: 3%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
0.0 In
Fri 12
Sep		01:00

NNE
NNE

 9 / 16 mph 51 / 47°F 98% 1018 mb
Low level cloud: 96%
Mid level cloud: 86%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
07:00

NNE
NNE

 9 / 19 mph 51 / 47°F 57% 1023 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 11%
Most Significant Cloud Type: medium
15%
0.0 In
13:00

NW
NW

 11 / 22 mph 68 / 68°F 37% 1014 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
0.0 In
19:00

E
E

 1 / 2 mph 65 / 65°F 68% 1024 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
0.0 In
Sat 13
Sep		01:00

NNW
NNW

 4 / 7 mph 55 / 55°F 62% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
0.0 In
07:00

N
N

 3 / 6 mph 59 / 59°F 60% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
0.0 In
13:00

NNE
NNE

 4 / 8 mph 75 / 75°F 29% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
19:00

SSE
SSE

 5 / 9 mph 63 / 63°F 62% 1027 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
Sun 14
Sep		01:00

W
W

 3 / 6 mph 58 / 59°F 73% 1025 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.0 In
07:00

WSW
WSW

 4 / 7 mph 61 / 61°F 73% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

SSW
SSW

 3 / 6 mph 81 / 80°F 34% 1023 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
19:00

SW
SW

 8 / 14 mph 67 / 67°F 62% 1023 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 3%
Most Significant Cloud Type: medium
4%
0.0 In
Mon 15
Sep		01:00

WSW
WSW

 5 / 9 mph 61 / 61°F 75% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

WSW
WSW

 6 / 11 mph 66 / 66°F 62% 1021 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
13:00

WNW
WNW

 3 / 5 mph 85 / 83°F 30% 1020 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
0.0 In
19:00

WNW
WNW

 5 / 10 mph 76 / 79°F 60% 1019 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
0.0 In
Tue 16
Sep		01:00

WNW
WNW

 3 / 5 mph 68 / 68°F 75% 1020 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
07:00

NE
NE

 6 / 11 mph 64 / 64°F 73% 1024 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: medium
36%
0.0 In
13:00

SSW
SSW

 3 / 7 mph 85 / 85°F 40% 1017 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
19:00

ESE
ESE

 6 / 12 mph 62 / 62°F 74% 1025 mb
Low level cloud: 10%
Mid level cloud: 15%
High level cloud: 1%
Most Significant Cloud Type: low
15%
0.0 In
Wed 17
Sep		01:00

SSW
SSW

 6 / 12 mph 67 / 67°F 73% 1016 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
0.0 In
07:00

NE
NE

 2 / 4 mph 62 / 62°F 79% 1025 mb
Low level cloud: 1%
Mid level cloud: 21%
High level cloud: 33%
Most Significant Cloud Type: medium
24%
0.0 In
13:00

SSW
SSW

 12 / 24 mph 80 / 80°F 38% 1013 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
9%
0.0 In
19:00

S
S

 2 / 4 mph 64 / 64°F 81% 1024 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
Thu 18
Sep		01:00

SSW
SSW

 8 / 17 mph 65 / 65°F 93% 1015 mb
Low level cloud: 40%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
55%
0.0 In
07:00

WSW
WSW

 1 / 2 mph 65 / 65°F 73% 1023 mb
Low level cloud: 2%
Mid level cloud: 11%
High level cloud: 3%
Most Significant Cloud Type: medium
16%
0.0 In
13:00

S
S

 12 / 24 mph 77 / 79°F 56% 1013 mb
Low level cloud: 8%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
67%
0.0 In
19:00

S
S

 5 / 9 mph 71 / 71°F 81% 1021 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
Fri 19
Sep		01:00

N
N

 6 / 12 mph 59 / 59°F 91% 1015 mb
Low level cloud: 98%
Mid level cloud: 46%
High level cloud: 4%
Most Significant Cloud Type: low
100%
0.1 In
07:00

NNE
NNE

 1 / 2 mph 64 / 64°F 91% 1022 mb
Low level cloud: 12%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
81%
0.0 In
13:00

N
N

 5 / 11 mph 64 / 64°F 65% 1015 mb
Low level cloud: 16%
Mid level cloud: 69%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
19:00

E
E

 6 / 11 mph 65 / 65°F 99% 1018 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
1.1 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