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Heidelberg 14 Day Long Range Forecast

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

Germany

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

For Heidelberg in the coming two weeks the average daytime maximum temperature will be around 7°C, with a high for the two weeks of 11°C expected on the afternoon of Wednesday 11th. The mean minimum temperature will be 2°C, dipping to its lowest on the morning of Sunday 15th at -1°C. The next 14 days will have some days seeing a little precipitation and some days with rain or snow. The indicators are that Wednesday 11th will have the most precipitation with an accumulation of around 11.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 05
Feb		16:00

NE
NE

 9 / 11 mph 44 / 39°F 74% 991 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNE
NNE

 11 / 21 mph 37 / 29°F 90% 990 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 100%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 12 / 23 mph 36 / 28°F 89% 988 mb
Low level cloud: 6%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 06
Feb		01:00

NNE
NNE

 9 / 16 mph 35 / 28°F 90% 988 mb
Low level cloud: 1%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

 4 / 7 mph 35 / 31°F 89% 990 mb
Low level cloud: 2%
Mid level cloud: 81%
High level cloud: 100%
Most Significant Cloud Type: medium
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 1 / 2 mph 34 / 35°F 90% 992 mb
Low level cloud: 51%
Mid level cloud: 100%
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

SSW
SSW

 2 / 4 mph 39 / 37°F 86% 994 mb
Low level cloud: 86%
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
13:00

SW
SW

 5 / 9 mph 39 / 36°F 98% 995 mb
Low level cloud: 100%
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
16:00

SSW
SSW

 7 / 12 mph 42 / 37°F 97% 996 mb
Low level cloud: 92%
Mid level cloud: 57%
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

SSW
SSW

 8 / 14 mph 43 / 38°F 97% 998 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

 8 / 15 mph 43 / 38°F 96% 1000 mb
Low level cloud: 96%
Mid level cloud: 48%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 07
Feb		01:00

SSW
SSW

 7 / 13 mph 42 / 38°F 94% 1002 mb
Low level cloud: 31%
Mid level cloud: 44%
High level cloud: 1%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 6 / 12 mph 42 / 38°F 92% 1003 mb
Low level cloud: 11%
Mid level cloud: 21%
High level cloud: 14%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

 4 / 8 mph 39 / 36°F 93% 1003 mb
Low level cloud: 23%
Mid level cloud: 5%
High level cloud: 11%
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 / 3 mph 44 / 43°F 88% 1005 mb
Low level cloud: 39%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ENE
ENE

 4 / 5 mph 50 / 48°F 77% 1005 mb
Low level cloud: 18%
Mid level cloud: 3%
High level cloud: 16%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NE
NE

 5 / 6 mph 50 / 48°F 77% 1005 mb
Low level cloud: 4%
Mid level cloud: 1%
High level cloud: 7%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNE
NNE

 6 / 13 mph 42 / 37°F 89% 1007 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 20%
Most Significant Cloud Type: high
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

 7 / 14 mph 40 / 35°F 93% 1008 mb
Low level cloud: 14%
Mid level cloud: 2%
High level cloud: 15%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 08
Feb		01:00

NNE
NNE

 7 / 14 mph 38 / 33°F 95% 1009 mb
Low level cloud: 21%
Mid level cloud: 0%
High level cloud: 14%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

 7 / 14 mph 36 / 31°F 95% 1009 mb
Low level cloud: 25%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNE
NNE

 9 / 17 mph 35 / 29°F 96% 1009 mb
Low level cloud: 40%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

 11 / 14 mph 41 / 34°F 88% 1010 mb
Low level cloud: 30%
Mid level cloud: 3%
High level cloud: 11%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ENE
ENE

 15 / 17 mph 47 / 41°F 76% 1009 mb
Low level cloud: 50%
Mid level cloud: 1%
High level cloud: 7%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NE
NE

 14 / 17 mph 46 / 39°F 77% 1009 mb
Low level cloud: 88%
Mid level cloud: 0%
High level cloud: 16%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

 12 / 17 mph 42 / 36°F 80% 1010 mb
Low level cloud: 77%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 11 / 16 mph 41 / 34°F 80% 1010 mb
Low level cloud: 50%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 09
Feb		01:00

NE
NE

 12 / 15 mph 39 / 31°F 89% 1010 mb
Low level cloud: 53%
Mid level cloud: 3%
High level cloud: 100%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

 11 / 15 mph 37 / 30°F 86% 1010 mb
Low level cloud: 97%
Mid level cloud: 7%
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

NE
NE

 11 / 12 mph 37 / 30°F 88% 1009 mb
Low level cloud: 86%
Mid level cloud: 12%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

 11 / 13 mph 40 / 34°F 86% 1009 mb
Low level cloud: 84%
Mid level cloud: 33%
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

NE
NE

 10 / 12 mph 43 / 37°F 77% 1008 mb
Low level cloud: 80%
Mid level cloud: 33%
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

NE
NE

 7 / 9 mph 44 / 39°F 73% 1007 mb
Low level cloud: 53%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNE
NNE

 6 / 7 mph 42 / 39°F 79% 1008 mb
Low level cloud: 76%
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
22:00

NNE
NNE

 4 / 5 mph 40 / 38°F 84% 1008 mb
Low level cloud: 87%
Mid level cloud: 46%
High level cloud: 22%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 10
Feb		01:00

ENE
ENE

 2 / 3 mph 39 / 39°F 84% 1007 mb
Low level cloud: 29%
Mid level cloud: 76%
High level cloud: 2%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

 1 / 2 mph 38 / 38°F 87% 1006 mb
Low level cloud: 67%
Mid level cloud: 100%
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 / 4 mph 36 / 35°F 94% 1006 mb
Low level cloud: 52%
Mid level cloud: 22%
High level cloud: 7%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 5 / 6 mph 42 / 39°F 84% 1006 mb
Low level cloud: 14%
Mid level cloud: 12%
High level cloud: 19%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 7 / 8 mph 49 / 45°F 66% 1004 mb
Low level cloud: 8%
Mid level cloud: 32%
High level cloud: 5%
Most Significant Cloud Type: medium
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 6 / 8 mph 49 / 46°F 66% 1002 mb
Low level cloud: 37%
Mid level cloud: 94%
High level cloud: 3%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 4 / 6 mph 45 / 44°F 76% 1000 mb
Low level cloud: 96%
Mid level cloud: 86%
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

SSW
SSW

 8 / 12 mph 45 / 41°F 76% 998 mb
Low level cloud: 100%
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
Wed 11
Feb		01:00

SSW
SSW

 11 / 16 mph 46 / 41°F 90% 993 mb
Low level cloud: 100%
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
04:00

SSW
SSW

 17 / 27 mph 45 / 37°F 94% 990 mb
Low level cloud: 100%
Mid level cloud: 70%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
07:00

WSW
WSW

 20 / 43 mph 45 / 37°F 82% 989 mb
Low level cloud: 87%
Mid level cloud: 78%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

SW
SW

 24 / 40 mph 49 / 41°F 72% 991 mb
Low level cloud: 76%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

 22 / 25 mph 52 / 46°F 83% 991 mb
Low level cloud: 96%
Mid level cloud: 66%
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

WSW
WSW

 21 / 25 mph 52 / 47°F 76% 992 mb
Low level cloud: 86%
Mid level cloud: 53%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

SW
SW

 15 / 17 mph 50 / 45°F 78% 992 mb
Low level cloud: 35%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

 16 / 18 mph 48 / 41°F 82% 993 mb
Low level cloud: 71%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 12
Feb		01:00

SW
SW

 19 / 32 mph 46 / 39°F 80% 992 mb
Low level cloud: 98%
Mid level cloud: 83%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
07:00

WSW
WSW

 22 / 33 mph 41 / 32°F 86% 1001 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
13:00

NNE
NNE

 11 / 14 mph 39 / 32°F 81% 998 mb
Low level cloud: 85%
Mid level cloud: 74%
High level cloud: 59%
Most Significant Cloud Type: low
100%
0.0 In
19:00

SSW
SSW

 12 / 15 mph 43 / 37°F 92% 1000 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Fri 13
Feb		01:00

SSW
SSW

 6 / 8 mph 42 / 39°F 96% 999 mb
Low level cloud: 89%
Mid level cloud: 68%
High level cloud: 19%
Most Significant Cloud Type: low
100%
0.0 In
07:00

SSW
SSW

 14 / 20 mph 44 / 37°F 92% 995 mb
Low level cloud: 98%
Mid level cloud: 63%
High level cloud: 2%
Most Significant Cloud Type: low
100%
0.0 In
13:00

SSW
SSW

 14 / 18 mph 52 / 47°F 65% 1002 mb
Low level cloud: 4%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: medium
33%
0.0 In
19:00

W
W

 13 / 19 mph 42 / 35°F 76% 1000 mb
Low level cloud: 6%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
42%
0.0 In
Sat 14
Feb		01:00

SSW
SSW

 18 / 36 mph 45 / 38°F 91% 990 mb
Low level cloud: 99%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.5 In
07:00

SW
SW

 9 / 15 mph 33 / 26°F 90% 1000 mb
Low level cloud: 42%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
48%
0.0 In
13:00

SSW
SSW

 12 / 16 mph 49 / 44°F 82% 990 mb
Low level cloud: 98%
Mid level cloud: 76%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.6 In
19:00

W
W

 12 / 20 mph 38 / 30°F 72% 1005 mb
Low level cloud: 2%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
0.0 In
Sun 15
Feb		01:00

SW
SW

 17 / 30 mph 43 / 35°F 78% 993 mb
Low level cloud: 65%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
70%
0.6 In
07:00

WSW
WSW

 6 / 10 mph 32 / 26°F 89% 1012 mb
Low level cloud: 12%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
77%
0.0 In
13:00

WSW
WSW

 17 / 26 mph 45 / 38°F 86% 994 mb
Low level cloud: 94%
Mid level cloud: 58%
High level cloud: 11%
Most Significant Cloud Type: low
100%
0.1 In
19:00

NE
NE

 6 / 11 mph 40 / 35°F 71% 1016 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
Mon 16
Feb		01:00

SW
SW

 18 / 28 mph 39 / 29°F 87% 998 mb
Low level cloud: 98%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
07:00

NE
NE

 6 / 10 mph 32 / 26°F 72% 1016 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
13:00

W
W

 19 / 31 mph 43 / 35°F 81% 1010 mb
Low level cloud: 71%
Mid level cloud: 46%
High level cloud: 3%
Most Significant Cloud Type: low
87%
0.1 In
19:00

NNE
NNE

 7 / 12 mph 37 / 32°F 68% 1013 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
Tue 17
Feb		01:00

WSW
WSW

 12 / 21 mph 37 / 28°F 93% 1014 mb
Low level cloud: 100%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
07:00

NE
NE

 14 / 22 mph 28 / 17°F 67% 1006 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
13:00

W
W

 10 / 18 mph 41 / 35°F 61% 1018 mb
Low level cloud: 62%
Mid level cloud: 5%
High level cloud: 21%
Most Significant Cloud Type: low
66%
0.0 In
19:00

NNE
NNE

 16 / 26 mph 32 / 22°F 52% 1006 mb
Low level cloud: 83%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Wed 18
Feb		01:00

WNW
WNW

 4 / 7 mph 35 / 32°F 83% 1021 mb
Low level cloud: 1%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
33%
0.0 In
07:00

NE
NE

 13 / 21 mph 24 / 13°F 61% 1013 mb
Low level cloud: 100%
Mid level cloud: 45%
High level cloud: 15%
Most Significant Cloud Type: low
100%
0.0 In
13:00

NW
NW

 6 / 11 mph 43 / 38°F 56% 1027 mb
Low level cloud: 100%
Mid level cloud: 88%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
19:00

NNE
NNE

 9 / 14 mph 30 / 22°F 56% 1021 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 3%
Most Significant Cloud Type: medium
100%
0.0 In
Thu 19
Feb		01:00

SW
SW

 4 / 7 mph 37 / 33°F 76% 1033 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 19%
Most Significant Cloud Type: medium
14%
0.0 In
07:00

NE
NE

 10 / 17 mph 24 / 13°F 76% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

SW
SW

 7 / 12 mph 45 / 41°F 46% 1029 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: medium
11%
0.0 In
19:00

NE
NE

 7 / 14 mph 31 / 24°F 58% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Fri 20
Feb		01:00

SW
SW

 6 / 11 mph 36 / 31°F 76% 1025 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 100%
Most Significant Cloud Type: medium
23%
0.0 In
07:00

ENE
ENE

 3 / 5 mph 30 / 28°F 79% 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

SW
SW

 10 / 18 mph 49 / 45°F 52% 1018 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
19:00

SW
SW

 2 / 3 mph 38 / 37°F 73% 1032 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In

Other Locations Near to Heidelberg

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