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Caen 14 Day Long Range Forecast

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

France

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

Reviewing the forecast for Caen Over the next 14 days and the average daytime maximum temperature will be around 7°C, with a high for the two weeks of 13°C expected on the afternoon of Thursday 18th. The average minimum temperature will be 3°C, dipping to its lowest on the morning of Sunday 28th at -4°C. Expect the coming 14 days to have mixed weather with some days dry and some seeing a little rain. Predictions are Friday 19th will have the most precipitation with an accumulation of around 4.0mm. On the whole winds are likely to be moderate. The strongest wind will be experienced on the afternoon of Thursday 18th, coming from a southerly direction, and reaching around 26mph.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 18
Dec		19:00

SSW
SSW

 23 / 31 mph 55 / 49°F 83% 1006 mb
Low level cloud: 75%
Mid level cloud: 63%
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

 19 / 32 mph 54 / 49°F 87% 1008 mb
Low level cloud: 91%
Mid level cloud: 82%
High level cloud: 29%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 19
Dec		01:00

SW
SW

 15 / 23 mph 54 / 50°F 91% 1009 mb
Low level cloud: 85%
Mid level cloud: 68%
High level cloud: 82%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
04:00

W
W

 10 / 16 mph 49 / 44°F 84% 1013 mb
Low level cloud: 15%
Mid level cloud: 100%
High level cloud: 99%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 7 / 13 mph 45 / 42°F 87% 1017 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 37%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 7 / 13 mph 45 / 42°F 81% 1019 mb
Low level cloud: 0%
Mid level cloud: 97%
High level cloud: 36%
Most Significant Cloud Type: medium
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 10 / 13 mph 51 / 47°F 71% 1020 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 20%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

 7 / 11 mph 49 / 46°F 78% 1020 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 29%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 7 / 14 mph 43 / 39°F 87% 1021 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 6 / 13 mph 42 / 38°F 87% 1021 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 41%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 20
Dec		01:00

S
S

 6 / 12 mph 42 / 38°F 85% 1019 mb
Low level cloud: 0%
Mid level cloud: 66%
High level cloud: 100%
Most Significant Cloud Type: medium
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 7 / 15 mph 42 / 37°F 85% 1017 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 36%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 8 / 14 mph 41 / 36°F 86% 1015 mb
Low level cloud: 0%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: medium
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 7 / 13 mph 40 / 35°F 89% 1013 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
13:00

S
S

 10 / 13 mph 47 / 42°F 70% 1011 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 16%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

 10 / 15 mph 47 / 42°F 74% 1008 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 100%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

 13 / 22 mph 44 / 37°F 83% 1007 mb
Low level cloud: 0%
Mid level cloud: 84%
High level cloud: 39%
Most Significant Cloud Type: medium
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 13 / 21 mph 46 / 40°F 87% 1005 mb
Low level cloud: 48%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 21
Dec		01:00

SSE
SSE

 11 / 22 mph 42 / 36°F 87% 1003 mb
Low level cloud: 35%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 11 / 24 mph 41 / 34°F 88% 1001 mb
Low level cloud: 66%
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

SSE
SSE

 12 / 26 mph 41 / 34°F 88% 999 mb
Low level cloud: 75%
Mid level cloud: 95%
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

S
S

 13 / 21 mph 45 / 38°F 83% 1000 mb
Low level cloud: 31%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 14 / 19 mph 48 / 42°F 74% 1000 mb
Low level cloud: 32%
Mid level cloud: 13%
High level cloud: 32%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 13 / 17 mph 48 / 43°F 70% 1001 mb
Low level cloud: 15%
Mid level cloud: 73%
High level cloud: 16%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 11 / 13 mph 46 / 41°F 79% 1003 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 15%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 9 / 13 mph 44 / 39°F 82% 1004 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 22
Dec		01:00

SSE
SSE

 7 / 15 mph 39 / 34°F 88% 1004 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 100%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 7 / 14 mph 38 / 33°F 90% 1005 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

 5 / 10 mph 38 / 34°F 91% 1006 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 100%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSE
SSE

 5 / 9 mph 38 / 34°F 89% 1007 mb
Low level cloud: 2%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: medium
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 5 / 6 mph 45 / 42°F 74% 1008 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 2 / 3 mph 45 / 45°F 77% 1008 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 14%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 3 / 5 mph 40 / 39°F 87% 1009 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 14%
Most Significant Cloud Type: high
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 4 / 8 mph 39 / 36°F 90% 1011 mb
Low level cloud: 1%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 23
Dec		01:00

SE
SE

 5 / 11 mph 38 / 34°F 92% 1010 mb
Low level cloud: 2%
Mid level cloud: 3%
High level cloud: 45%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SE
SE

 6 / 13 mph 36 / 31°F 92% 1009 mb
Low level cloud: 1%
Mid level cloud: 3%
High level cloud: 18%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SE
SE

 7 / 15 mph 34 / 28°F 93% 1009 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: high
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SE
SE

 7 / 15 mph 35 / 29°F 91% 1009 mb
Low level cloud: 1%
Mid level cloud: 7%
High level cloud: 33%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ESE
ESE

 10 / 14 mph 43 / 37°F 77% 1008 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

E
E

 9 / 13 mph 43 / 38°F 83% 1007 mb
Low level cloud: 9%
Mid level cloud: 58%
High level cloud: 100%
Most Significant Cloud Type: medium
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

 8 / 14 mph 40 / 35°F 94% 1008 mb
Low level cloud: 29%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 6 / 10 mph 39 / 35°F 97% 1010 mb
Low level cloud: 71%
Mid level cloud: 22%
High level cloud: 94%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 24
Dec		01:00

ENE
ENE

 5 / 10 mph 40 / 37°F 93% 1010 mb
Low level cloud: 95%
Mid level cloud: 92%
High level cloud: 93%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

 8 / 17 mph 39 / 34°F 90% 1011 mb
Low level cloud: 48%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 10 / 22 mph 39 / 32°F 84% 1012 mb
Low level cloud: 73%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

 11 / 19 mph 43 / 36°F 82% 1014 mb
Low level cloud: 38%
Mid level cloud: 32%
High level cloud: 12%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NE
NE

 13 / 18 mph 45 / 39°F 72% 1016 mb
Low level cloud: 25%
Mid level cloud: 24%
High level cloud: 79%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NE
NE

 13 / 17 mph 46 / 39°F 77% 1017 mb
Low level cloud: 85%
Mid level cloud: 3%
High level cloud: 32%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

 16 / 21 mph 44 / 36°F 82% 1019 mb
Low level cloud: 53%
Mid level cloud: 2%
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

ENE
ENE

 15 / 18 mph 41 / 34°F 87% 1022 mb
Low level cloud: 30%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 25
Dec		01:00

ENE
ENE

 12 / 21 mph 36 / 28°F 80% 1018 mb
Low level cloud: 24%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
51%
0.0 In
07:00

S
S

 2 / 4 mph 44 / 43°F 93% 1012 mb
Low level cloud: 21%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: low
38%
0.0 In
13:00

S
S

 8 / 12 mph 48 / 44°F 77% 1008 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
19:00

ENE
ENE

 5 / 7 mph 46 / 44°F 93% 1017 mb
Low level cloud: 44%
Mid level cloud: 46%
High level cloud: 49%
Most Significant Cloud Type: low
65%
0.0 In
Fri 26
Dec		01:00

ENE
ENE

 12 / 22 mph 38 / 30°F 90% 1015 mb
Low level cloud: 29%
Mid level cloud: 40%
High level cloud: 100%
Most Significant Cloud Type: low
54%
0.0 In
07:00

E
E

 5 / 8 mph 40 / 37°F 91% 1017 mb
Low level cloud: 17%
Mid level cloud: 43%
High level cloud: 2%
Most Significant Cloud Type: low
32%
0.0 In
13:00

ENE
ENE

 16 / 21 mph 30 / 19°F 84% 1016 mb
Low level cloud: 85%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
19:00

ENE
ENE

 12 / 16 mph 36 / 27°F 69% 1019 mb
Low level cloud: 100%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Sat 27
Dec		01:00

ENE
ENE

 13 / 21 mph 34 / 24°F 50% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

ENE
ENE

 9 / 14 mph 29 / 21°F 70% 1018 mb
Low level cloud: 18%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.0 In
13:00

ENE
ENE

 14 / 19 mph 38 / 30°F 40% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 34%
Most Significant Cloud Type: high
34%
0.0 In
19:00

E
E

 7 / 9 mph 35 / 29°F 66% 1017 mb
Low level cloud: 29%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
38%
0.0 In
Sun 28
Dec		01:00

E
E

 5 / 8 mph 31 / 26°F 55% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

ESE
ESE

 4 / 7 mph 30 / 25°F 89% 1021 mb
Low level cloud: 1%
Mid level cloud: 2%
High level cloud: 3%
Most Significant Cloud Type: low
1%
0.0 In
13:00

E
E

 7 / 9 mph 37 / 31°F 38% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
19:00

ENE
ENE

 6 / 11 mph 35 / 30°F 87% 1024 mb
Low level cloud: 5%
Mid level cloud: 3%
High level cloud: 3%
Most Significant Cloud Type: low
6%
0.0 In
Mon 29
Dec		01:00

SSE
SSE

 5 / 8 mph 29 / 24°F 67% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: high
6%
0.0 In
07:00

E
E

 6 / 10 mph 31 / 25°F 93% 1026 mb
Low level cloud: 11%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
11%
0.0 In
13:00

SSW
SSW

 5 / 6 mph 40 / 37°F 54% 1026 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
19:00

E
E

 8 / 16 mph 34 / 27°F 90% 1027 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
Tue 30
Dec		01:00

S
S

 4 / 7 mph 34 / 30°F 89% 1027 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
07:00

E
E

 7 / 14 mph 30 / 23°F 93% 1027 mb
Low level cloud: 7%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
7%
0.0 In
13:00

E
E

 4 / 4 mph 41 / 39°F 69% 1027 mb
Low level cloud: 51%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
53%
0.0 In
19:00

E
E

 10 / 21 mph 30 / 21°F 72% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Wed 31
Dec		01:00

ESE
ESE

 5 / 9 mph 36 / 32°F 84% 1028 mb
Low level cloud: 85%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
87%
0.0 In
07:00

E
E

 6 / 11 mph 27 / 20°F 82% 1027 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

ESE
ESE

 9 / 11 mph 41 / 35°F 69% 1028 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
19:00

E
E

 7 / 12 mph 32 / 25°F 74% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Thu 01
Jan		01:00

ESE
ESE

 7 / 14 mph 31 / 24°F 84% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

E
E

 5 / 10 mph 27 / 22°F 80% 1024 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 21%
Most Significant Cloud Type: medium
46%
0.0 In
13:00

ESE
ESE

 7 / 9 mph 39 / 34°F 55% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: high
32%
0.0 In
19:00

E
E

 7 / 15 mph 30 / 23°F 70% 1022 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 36%
Most Significant Cloud Type: medium
46%
0.0 In
Fri 02
Jan		01:00

S
S

 6 / 12 mph 33 / 27°F 80% 1026 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 15%
Most Significant Cloud Type: medium
44%
0.0 In
07:00

E
E

 9 / 19 mph 26 / 17°F 94% 1019 mb
Low level cloud: 10%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
12%
0.0 In
13:00

S
S

 7 / 10 mph 45 / 41°F 77% 1028 mb
Low level cloud: 40%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: low
53%
0.0 In
19:00

E
E

 17 / 27 mph 32 / 21°F 76% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In

Other Locations Near to Caen

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