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Amherst 14 Day Long Range Forecast

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

Massachusetts, United States Of America

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

Reviewing the forecast for Amherst Over the next 14 days and the average daytime maximum temperature will be around 4°C, with a high for the two weeks of 8°C expected on the afternoon of Wednesday 5th. The mean minimum temperature will be -6°C, dipping to its lowest on the morning of Monday 24th at -13°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain or snow. The current forecast indicates Thursday 27th will have the most precipitation with an accumulation of around 7.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Mon 24
Feb		16:00

S
S

 10 / 16 mph 37 / 29°F 89% 1014 mb
Low level cloud: 38%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 9 / 16 mph 34 / 27°F 88% 1013 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
22:00

SSW
SSW

 7 / 13 mph 33 / 27°F 86% 1012 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 100%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 25
Feb		01:00

S
S

 6 / 13 mph 29 / 22°F 93% 1011 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 11%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 5 / 10 mph 28 / 22°F 96% 1010 mb
Low level cloud: 10%
Mid level cloud: 32%
High level cloud: 52%
Most Significant Cloud Type: medium
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 2 / 5 mph 30 / 28°F 97% 1010 mb
Low level cloud: 31%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 3 / 4 mph 38 / 35°F 96% 1009 mb
Low level cloud: 33%
Mid level cloud: 45%
High level cloud: 97%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 3 / 4 mph 42 / 41°F 93% 1007 mb
Low level cloud: 51%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

 2 / 4 mph 40 / 39°F 98% 1007 mb
Low level cloud: 37%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

 2 / 4 mph 34 / 34°F 100% 1008 mb
Low level cloud: 98%
Mid level cloud: 77%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 3 / 6 mph 34 / 31°F 98% 1008 mb
Low level cloud: 90%
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
Wed 26
Feb		01:00

W
W

 3 / 6 mph 29 / 25°F 96% 1008 mb
Low level cloud: 51%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WNW
WNW

 6 / 12 mph 33 / 27°F 88% 1008 mb
Low level cloud: 38%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WNW
WNW

 5 / 11 mph 31 / 25°F 91% 1009 mb
Low level cloud: 81%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NW
NW

 10 / 11 mph 40 / 33°F 82% 1011 mb
Low level cloud: 32%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

 9 / 11 mph 42 / 36°F 76% 1011 mb
Low level cloud: 40%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 7 / 8 mph 41 / 36°F 82% 1013 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 18%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ESE
ESE

 1 / 2 mph 30 / 30°F 96% 1014 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 19%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SE
SE

 1 / 3 mph 29 / 29°F 98% 1014 mb
Low level cloud: 3%
Mid level cloud: 44%
High level cloud: 83%
Most Significant Cloud Type: medium
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 27
Feb		01:00

SE
SE

 2 / 4 mph 30 / 29°F 97% 1012 mb
Low level cloud: 16%
Mid level cloud: 100%
High level cloud: 68%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 4 / 10 mph 31 / 27°F 97% 1007 mb
Low level cloud: 97%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 3 / 6 mph 35 / 32°F 100% 1005 mb
Low level cloud: 98%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

S
S

 6 / 9 mph 40 / 36°F 99% 1002 mb
Low level cloud: 99%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
13:00

SSW
SSW

 6 / 12 mph 40 / 36°F 99% 1001 mb
Low level cloud: 97%
Mid level cloud: 98%
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

SW
SW

 3 / 7 mph 40 / 38°F 98% 1001 mb
Low level cloud: 62%
Mid level cloud: 53%
High level cloud: 69%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

 4 / 7 mph 33 / 30°F 97% 1002 mb
Low level cloud: 45%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 3 / 7 mph 33 / 30°F 95% 1001 mb
Low level cloud: 18%
Mid level cloud: 46%
High level cloud: 9%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 28
Feb		01:00

W
W

 8 / 14 mph 33 / 26°F 86% 1001 mb
Low level cloud: 25%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

 5 / 10 mph 30 / 24°F 89% 1001 mb
Low level cloud: 9%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 3 / 7 mph 27 / 23°F 94% 1001 mb
Low level cloud: 60%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

W
W

 8 / 10 mph 38 / 32°F 71% 1002 mb
Low level cloud: 99%
Mid level cloud: 23%
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

W
W

 12 / 14 mph 41 / 34°F 74% 1001 mb
Low level cloud: 71%
Mid level cloud: 48%
High level cloud: 2%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 14 / 16 mph 32 / 22°F 74% 1006 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

 11 / 15 mph 23 / 11°F 75% 1012 mb
Low level cloud: 1%
Mid level cloud: 82%
High level cloud: 67%
Most Significant Cloud Type: medium
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NW
NW

 5 / 6 mph 21 / 15°F 75% 1014 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 22%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 01
Mar		01:00

NW
NW

 3 / 4 mph 21 / 16°F 64% 1016 mb
Low level cloud: 0%
Mid level cloud: 92%
High level cloud: 100%
Most Significant Cloud Type: medium
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SE
SE

 3 / 4 mph 21 / 17°F 74% 1014 mb
Low level cloud: 59%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SE
SE

 5 / 6 mph 23 / 15°F 82% 1013 mb
Low level cloud: 65%
Mid level cloud: 76%
High level cloud: 2%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 9 / 10 mph 29 / 21°F 81% 1010 mb
Low level cloud: 79%
Mid level cloud: 50%
High level cloud: 0%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SE
SE

 3 / 4 mph 36 / 33°F 94% 1005 mb
Low level cloud: 100%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

ESE
ESE

 1 / 1 mph 35 / 35°F 99% 1002 mb
Low level cloud: 99%
Mid level cloud: 57%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

 12 / 16 mph 33 / 25°F 90% 1004 mb
Low level cloud: 51%
Mid level cloud: 44%
High level cloud: 2%
Most Significant Cloud Type: low
66%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

WNW
WNW

 11 / 15 mph 18 / 6°F 78% 1009 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
Sun 02
Mar		01:00

NW
NW

 10 / 14 mph 16 / 3°F 76% 1013 mb
Low level cloud: 1%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

 8 / 10 mph 15 / 4°F 77% 1016 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NW
NW

 5 / 6 mph 14 / 6°F 78% 1019 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

NNW
NNW

 7 / 8 mph 21 / 12°F 56% 1021 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

NW
NW

 8 / 9 mph 27 / 18°F 51% 1020 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
16:00

NW
NW

 9 / 11 mph 24 / 15°F 56% 1021 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
19:00

WNW
WNW

 2 / 4 mph 17 / 13°F 83% 1024 mb
Low level cloud: 35%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WNW
WNW

 5 / 9 mph 15 / 7°F 82% 1025 mb
Low level cloud: 3%
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
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Mon 03
Mar		01:00

NW
NW

 10 / 15 mph 16 / 4°F 70% 1020 mb
Low level cloud: 14%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
13%
0.0 In
07:00

NW
NW

 8 / 10 mph 12 / 1°F 57% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

NW
NW

 9 / 11 mph 30 / 21°F 43% 1018 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
19:00

W
W

 1 / 1 mph 24 / 24°F 83% 1023 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 32%
Most Significant Cloud Type: medium
3%
0.0 In
Tue 04
Mar		01:00

SW
SW

 8 / 17 mph 31 / 23°F 96% 1008 mb
Low level cloud: 99%
Mid level cloud: 44%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.0 In
07:00

S
S

 8 / 11 mph 26 / 18°F 96% 1014 mb
Low level cloud: 85%
Mid level cloud: 100%
High level cloud: 80%
Most Significant Cloud Type: low
100%
0.0 In
13:00

WSW
WSW

 4 / 8 mph 37 / 34°F 91% 1009 mb
Low level cloud: 89%
Mid level cloud: 43%
High level cloud: 98%
Most Significant Cloud Type: low
100%
0.0 In
19:00

NE
NE

 2 / 3 mph 27 / 28°F 85% 1023 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
49%
0.0 In
Wed 05
Mar		01:00

WSW
WSW

 2 / 4 mph 30 / 30°F 97% 1013 mb
Low level cloud: 1%
Mid level cloud: 74%
High level cloud: 98%
Most Significant Cloud Type: medium
81%
0.0 In
07:00

SSE
SSE

 3 / 5 mph 28 / 25°F 88% 1021 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 99%
Most Significant Cloud Type: medium
48%
0.0 In
13:00

NE
NE

 2 / 2 mph 47 / 47°F 68% 1010 mb
Low level cloud: 10%
Mid level cloud: 65%
High level cloud: 100%
Most Significant Cloud Type: medium
98%
0.0 In
19:00

S
S

 12 / 19 mph 42 / 36°F 96% 1009 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 60%
Most Significant Cloud Type: low
100%
0.0 In
Thu 06
Mar		01:00

E
E

 9 / 13 mph 33 / 26°F 94% 1001 mb
Low level cloud: 100%
Mid level cloud: 99%
High level cloud: 74%
Most Significant Cloud Type: low
100%
0.7 In
07:00

SSW
SSW

 9 / 18 mph 50 / 46°F 93% 996 mb
Low level cloud: 30%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
40%
0.5 In
13:00

NNE
NNE

 7 / 10 mph 30 / 23°F 96% 996 mb
Low level cloud: 78%
Mid level cloud: 67%
High level cloud: 5%
Most Significant Cloud Type: low
100%
0.1 In
19:00

WNW
WNW

 10 / 16 mph 32 / 24°F 76% 1007 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
32%
0.0 In
Fri 07
Mar		01:00

NE
NE

 2 / 3 mph 28 / 26°F 97% 996 mb
Low level cloud: 74%
Mid level cloud: 61%
High level cloud: 0%
Most Significant Cloud Type: low
95%
0.1 In
07:00

WNW
WNW

 2 / 4 mph 32 / 29°F 61% 1015 mb
Low level cloud: 0%
Mid level cloud: 47%
High level cloud: 52%
Most Significant Cloud Type: medium
49%
0.0 In
13:00

W
W

 4 / 6 mph 37 / 33°F 95% 992 mb
Low level cloud: 85%
Mid level cloud: 54%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
19:00

SSE
SSE

 4 / 6 mph 35 / 32°F 63% 1013 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
0.0 In
Sat 08
Mar		01:00

NW
NW

 11 / 16 mph 16 / 3°F 81% 1005 mb
Low level cloud: 20%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
20%
0.0 In
07:00

S
S

 7 / 11 mph 33 / 26°F 80% 1010 mb
Low level cloud: 1%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
13:00

WSW
WSW

 5 / 7 mph 30 / 24°F 62% 1007 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 85%
Most Significant Cloud Type: medium
49%
0.0 In
19:00

NNW
NNW

 10 / 14 mph 27 / 18°F 74% 1005 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.2 In
Sun 09
Mar		01:00

NNE
NNE

 3 / 4 mph 28 / 24°F 97% 999 mb
Low level cloud: 78%
Mid level cloud: 91%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
07:00

WNW
WNW

 9 / 12 mph 19 / 9°F 66% 1011 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
13:00

WNW
WNW

 11 / 15 mph 32 / 22°F 70% 1003 mb
Low level cloud: 75%
Mid level cloud: 98%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
19:00

WNW
WNW

 7 / 11 mph 21 / 13°F 51% 1013 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 5%
Most Significant Cloud Type: medium
45%
0.0 In
Mon 10
Mar		01:00

NW
NW

 6 / 12 mph 11 / 2°F 89% 1017 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
07:00

WSW
WSW

 5 / 8 mph 22 / 15°F 57% 1011 mb
Low level cloud: 0%
Mid level cloud: 94%
High level cloud: 0%
Most Significant Cloud Type: medium
94%
0.0 In
13:00

NW
NW

 14 / 20 mph 19 / 5°F 64% 1024 mb
Low level cloud: 100%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
19:00

WNW
WNW

 11 / 17 mph 18 / 6°F 52% 1017 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
Tue 11
Mar		01:00

NW
NW

 3 / 4 mph 8 / 2°F 85% 1033 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

W
W

 6 / 9 mph 15 / 7°F 61% 1023 mb
Low level cloud: 8%
Mid level cloud: 3%
High level cloud: 100%
Most Significant Cloud Type: medium
28%
0.0 In
13:00

WSW
WSW

 4 / 6 mph 27 / 21°F 64% 1033 mb
Low level cloud: 1%
Mid level cloud: 100%
High level cloud: 11%
Most Significant Cloud Type: medium
100%
0.0 In
19:00

SW
SW

 6 / 10 mph 27 / 20°F 49% 1020 mb
Low level cloud: 62%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
96%
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