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Mount Tom 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Mount Tom

Massachusetts, United States Of America

Long range weather outlook for Mount Tom includes 14 day forecast summary:

The forecast for Mount Tom in the coming two weeks is predicting the average daytime maximum temperature will be around 23°C, with a high for the two weeks of 30°C expected on the afternoon of Wednesday 22nd. The mean minimum temperature will be 11°C, dipping to its lowest on the morning of Saturday 25th at 5°C. Expect the coming 14 days to have mixed overhead conditions with some days dry and some seeing a significant amount of rain. Current predictions suggest Thursday 23rd 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
Fri 17
May
13:00

E
E

7 / 11 mph 71 / 71°F 50% 1013 mb
Low level cloud: 9%
Mid level cloud: 80%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

E
E

8 / 12 mph 72 / 69°F 57% 1014 mb
Low level cloud: 25%
Mid level cloud: 28%
High level cloud: 85%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

5 / 8 mph 64 / 61°F 79% 1015 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 32%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

3 / 4 mph 56 / 56°F 92% 1016 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 11%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May
01:00

NNE
NNE

4 / 7 mph 51 / 50°F 96% 1016 mb
Low level cloud: 1%
Mid level cloud: 16%
High level cloud: 32%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

4 / 8 mph 49 / 47°F 93% 1017 mb
Low level cloud: 4%
Mid level cloud: 37%
High level cloud: 100%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNE
NNE

6 / 9 mph 52 / 50°F 79% 1017 mb
Low level cloud: 99%
Mid level cloud: 81%
High level cloud: 94%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNE
NNE

6 / 9 mph 55 / 53°F 73% 1017 mb
Low level cloud: 99%
Mid level cloud: 82%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NE
NE

6 / 9 mph 56 / 55°F 70% 1017 mb
Low level cloud: 97%
Mid level cloud: 64%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NE
NE

7 / 10 mph 58 / 57°F 69% 1016 mb
Low level cloud: 85%
Mid level cloud: 67%
High level cloud: 20%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

4 / 7 mph 57 / 55°F 84% 1016 mb
Low level cloud: 43%
Mid level cloud: 46%
High level cloud: 96%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

N
N

4 / 7 mph 52 / 51°F 97% 1017 mb
Low level cloud: 55%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May
01:00

N
N

4 / 8 mph 50 / 49°F 96% 1017 mb
Low level cloud: 85%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

5 / 8 mph 51 / 49°F 91% 1017 mb
Low level cloud: 87%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

N
N

6 / 9 mph 55 / 53°F 82% 1017 mb
Low level cloud: 84%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

8 / 10 mph 62 / 62°F 68% 1017 mb
Low level cloud: 96%
Mid level cloud: 13%
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

ENE
ENE

7 / 10 mph 65 / 64°F 65% 1016 mb
Low level cloud: 82%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ENE
ENE

5 / 8 mph 67 / 66°F 65% 1016 mb
Low level cloud: 83%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ESE
ESE

4 / 6 mph 63 / 61°F 89% 1016 mb
Low level cloud: 2%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

2 / 4 mph 54 / 55°F 97% 1018 mb
Low level cloud: 28%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
01:00

NNE
NNE

2 / 3 mph 51 / 52°F 98% 1018 mb
Low level cloud: 43%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

2 / 4 mph 50 / 50°F 98% 1018 mb
Low level cloud: 54%
Mid level cloud: 6%
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

3 / 4 mph 57 / 56°F 84% 1018 mb
Low level cloud: 25%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ENE
ENE

3 / 4 mph 73 / 69°F 56% 1017 mb
Low level cloud: 28%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ENE
ENE

2 / 3 mph 80 / 78°F 45% 1016 mb
Low level cloud: 10%
Mid level cloud: 17%
High level cloud: 3%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SE
SE

4 / 5 mph 80 / 78°F 45% 1015 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 34%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

7 / 11 mph 68 / 66°F 80% 1016 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 5%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

4 / 7 mph 59 / 59°F 96% 1017 mb
Low level cloud: 10%
Mid level cloud: 5%
High level cloud: 6%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
01:00

S
S

3 / 6 mph 55 / 55°F 98% 1016 mb
Low level cloud: 21%
Mid level cloud: 7%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

2 / 4 mph 54 / 54°F 98% 1016 mb
Low level cloud: 19%
Mid level cloud: 5%
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

S
S

2 / 3 mph 63 / 61°F 77% 1016 mb
Low level cloud: 1%
Mid level cloud: 4%
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

SSW
SSW

5 / 6 mph 77 / 77°F 55% 1015 mb
Low level cloud: 0%
Mid level cloud: 2%
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

S
S

8 / 9 mph 84 / 82°F 41% 1013 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

9 / 12 mph 84 / 82°F 45% 1011 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

9 / 14 mph 71 / 69°F 72% 1013 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 39%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

6 / 9 mph 62 / 62°F 84% 1014 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 15%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May
01:00

S
S

4 / 7 mph 60 / 60°F 91% 1013 mb
Low level cloud: 1%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

4 / 7 mph 56 / 56°F 97% 1013 mb
Low level cloud: 15%
Mid level cloud: 3%
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

SSW
SSW

5 / 8 mph 67 / 65°F 75% 1014 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

9 / 11 mph 81 / 80°F 48% 1013 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

11 / 13 mph 87 / 84°F 39% 1010 mb
Low level cloud: 0%
Mid level cloud: 26%
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

11 / 15 mph 85 / 84°F 46% 1009 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

10 / 15 mph 72 / 76°F 66% 1011 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

5 / 8 mph 63 / 63°F 90% 1012 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 100%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May
01:00

S
S

6 / 10 mph 61 / 61°F 95% 1010 mb
Low level cloud: 15%
Mid level cloud: 31%
High level cloud: 32%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

7 / 11 mph 60 / 60°F 95% 1009 mb
Low level cloud: 23%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

9 / 13 mph 65 / 63°F 84% 1008 mb
Low level cloud: 11%
Mid level cloud: 13%
High level cloud: 15%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

12 / 15 mph 78 / 78°F 62% 1007 mb
Low level cloud: 30%
Mid level cloud: 45%
High level cloud: 31%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

14 / 17 mph 84 / 84°F 52% 1004 mb
Low level cloud: 45%
Mid level cloud: 45%
High level cloud: 55%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

11 / 18 mph 77 / 79°F 80% 1003 mb
Low level cloud: 43%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

9 / 15 mph 71 / 68°F 94% 1004 mb
Low level cloud: 59%
Mid level cloud: 22%
High level cloud: 21%
Most Significant Cloud Type: low
69%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
22:00

NW
NW

11 / 17 mph 57 / 54°F 86% 1007 mb
Low level cloud: 28%
Mid level cloud: 0%
High level cloud: 40%
Most Significant Cloud Type: low
32%
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

NW
NW

3 / 4 mph 62 / 62°F 65% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

WNW
WNW

11 / 23 mph 55 / 51°F 64% 1009 mb
Low level cloud: 8%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
8%
0.0 In
13:00

W
W

11 / 14 mph 82 / 80°F 34% 1011 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 48%
Most Significant Cloud Type: medium
27%
0.0 In
19:00

SSW
SSW

3 / 4 mph 78 / 81°F 68% 1014 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 5%
Most Significant Cloud Type: medium
5%
0.0 In
Sat 25
May
01:00

NE
NE

6 / 12 mph 51 / 49°F 81% 1019 mb
Low level cloud: 92%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
07:00

WNW
WNW

11 / 17 mph 51 / 47°F 60% 1012 mb
Low level cloud: 30%
Mid level cloud: 12%
High level cloud: 7%
Most Significant Cloud Type: low
35%
0.0 In
13:00

WNW
WNW

13 / 27 mph 67 / 67°F 34% 1013 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
0.0 In
19:00

NNW
NNW

5 / 9 mph 63 / 63°F 55% 1020 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
Sun 26
May
01:00

W
W

2 / 4 mph 58 / 59°F 78% 1019 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 68%
Most Significant Cloud Type: medium
6%
0.0 In
07:00

NNW
NNW

2 / 5 mph 62 / 62°F 55% 1026 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 5%
Most Significant Cloud Type: high
5%
0.0 In
13:00

SSE
SSE

4 / 9 mph 78 / 77°F 28% 1019 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
19:00

S
S

5 / 9 mph 69 / 69°F 60% 1022 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 1%
Most Significant Cloud Type: high
0%
0.0 In
Mon 27
May
01:00

S
S

6 / 12 mph 58 / 57°F 66% 1019 mb
Low level cloud: 28%
Mid level cloud: 44%
High level cloud: 2%
Most Significant Cloud Type: low
43%
0.0 In
07:00

SSE
SSE

3 / 5 mph 58 / 59°F 67% 1019 mb
Low level cloud: 0%
Mid level cloud: 68%
High level cloud: 3%
Most Significant Cloud Type: medium
67%
0.0 In
13:00

S
S

7 / 16 mph 60 / 60°F 98% 1012 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 3%
Most Significant Cloud Type: low
100%
0.0 In
19:00

SE
SE

3 / 6 mph 71 / 71°F 82% 1013 mb
Low level cloud: 49%
Mid level cloud: 26%
High level cloud: 3%
Most Significant Cloud Type: low
58%
0.0 In
Tue 28
May
01:00

S
S

4 / 8 mph 66 / 66°F 99% 1009 mb
Low level cloud: 86%
Mid level cloud: 8%
High level cloud: 22%
Most Significant Cloud Type: low
91%
0.2 In
07:00

ENE
ENE

3 / 5 mph 58 / 59°F 98% 1013 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 58%
Most Significant Cloud Type: low
100%
0.1 In
13:00

WNW
WNW

12 / 25 mph 74 / 76°F 38% 1011 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 17%
Most Significant Cloud Type: medium
19%
0.0 In
19:00

E
E

2 / 4 mph 56 / 58°F 92% 1015 mb
Low level cloud: 87%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
93%
0.2 In
Wed 29
May
01:00

NW
NW

2 / 4 mph 61 / 61°F 87% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

S
S

2 / 4 mph 58 / 59°F 87% 1015 mb
Low level cloud: 37%
Mid level cloud: 11%
High level cloud: 98%
Most Significant Cloud Type: low
52%
0.0 In
13:00

NW
NW

6 / 14 mph 77 / 77°F 32% 1016 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 8%
Most Significant Cloud Type: medium
14%
0.0 In
19:00

SSW
SSW

4 / 9 mph 68 / 68°F 86% 1012 mb
Low level cloud: 5%
Mid level cloud: 43%
High level cloud: 97%
Most Significant Cloud Type: medium
62%
0.0 In
Thu 30
May
01:00

WNW
WNW

1 / 1 mph 64 / 64°F 80% 1018 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 34%
Most Significant Cloud Type: medium
18%
0.0 In
07:00

ENE
ENE

0 / 1 mph 64 / 64°F 87% 1012 mb
Low level cloud: 34%
Mid level cloud: 53%
High level cloud: 32%
Most Significant Cloud Type: low
56%
0.0 In
13:00

SSE
SSE

2 / 3 mph 77 / 78°F 43% 1016 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
49%
0.0 In
19:00

S
S

7 / 15 mph 63 / 63°F 97% 1011 mb
Low level cloud: 75%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
Fri 31
May
01:00

NW
NW

2 / 5 mph 56 / 57°F 98% 1017 mb
Low level cloud: 40%
Mid level cloud: 57%
High level cloud: 100%
Most Significant Cloud Type: low
71%
0.1 In
07:00

S
S

6 / 13 mph 57 / 56°F 99% 1010 mb
Low level cloud: 91%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.8 In
13:00

ENE
ENE

11 / 23 mph 65 / 65°F 63% 1019 mb
Low level cloud: 0%
Mid level cloud: 72%
High level cloud: 0%
Most Significant Cloud Type: medium
71%
0.3 In
19:00

SSE
SSE

3 / 7 mph 67 / 67°F 89% 1009 mb
Low level cloud: 52%
Mid level cloud: 26%
High level cloud: 2%
Most Significant Cloud Type: low
61%
0.0 In
Sat 01
Jun
01:00

NNE
NNE

14 / 30 mph 51 / 46°F 97% 1022 mb
Low level cloud: 94%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.6 In
07:00

S
S

4 / 7 mph 58 / 59°F 99% 1009 mb
Low level cloud: 67%
Mid level cloud: 52%
High level cloud: 16%
Most Significant Cloud Type: low
86%
0.4 In
13:00

NNE
NNE

13 / 28 mph 46 / 40°F 93% 1026 mb
Low level cloud: 95%
Mid level cloud: 93%
High level cloud: 3%
Most Significant Cloud Type: low
100%
1.1 In
19:00

W
W

3 / 7 mph 63 / 63°F 77% 1009 mb
Low level cloud: 0%
Mid level cloud: 67%
High level cloud: 0%
Most Significant Cloud Type: medium
67%
0.1 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