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Messe Duesseldorf 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Messe Duesseldorf

Germany

Long range weather outlook for Messe Duesseldorf includes 14 day forecast summary:

Reviewing the forecast for Messe Duesseldorf Over the next 14 days and 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 Tuesday 2nd. The average minimum temperature will be 4°C, dipping to its lowest on the morning of Sunday 23rd at 0°C. Expect the following 14 days ahead to have most days seeing a little rain. Predictions are Monday 1st will have the most precipitation with an accumulation of around 6.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 23
Nov
16:00

SSE
SSE

16 / 21 mph 34 / 24°F 79% 1003 mb
Low level cloud: 96%
Mid level cloud: 76%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

S
S

11 / 17 mph 36 / 29°F 88% 1000 mb
Low level cloud: 100%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

S
S

9 / 15 mph 39 / 33°F 92% 1000 mb
Low level cloud: 91%
Mid level cloud: 69%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 24
Nov
01:00

SSW
SSW

10 / 18 mph 38 / 31°F 91% 998 mb
Low level cloud: 100%
Mid level cloud: 14%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

9 / 18 mph 37 / 30°F 93% 997 mb
Low level cloud: 68%
Mid level cloud: 9%
High level cloud: 13%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

8 / 15 mph 37 / 31°F 95% 997 mb
Low level cloud: 54%
Mid level cloud: 46%
High level cloud: 6%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

8 / 13 mph 40 / 35°F 90% 997 mb
Low level cloud: 98%
Mid level cloud: 44%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

7 / 9 mph 43 / 38°F 93% 996 mb
Low level cloud: 99%
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
16:00

S
S

6 / 7 mph 43 / 40°F 91% 996 mb
Low level cloud: 95%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

SSE
SSE

5 / 7 mph 42 / 38°F 91% 996 mb
Low level cloud: 100%
Mid level cloud: 19%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SE
SE

4 / 8 mph 39 / 37°F 89% 998 mb
Low level cloud: 99%
Mid level cloud: 91%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 25
Nov
01:00

SSE
SSE

4 / 7 mph 40 / 38°F 87% 999 mb
Low level cloud: 83%
Mid level cloud: 52%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

4 / 7 mph 40 / 38°F 86% 1000 mb
Low level cloud: 36%
Mid level cloud: 80%
High level cloud: 96%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ESE
ESE

2 / 4 mph 40 / 40°F 85% 1002 mb
Low level cloud: 98%
Mid level cloud: 60%
High level cloud: 91%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ESE
ESE

2 / 2 mph 41 / 41°F 83% 1005 mb
Low level cloud: 95%
Mid level cloud: 50%
High level cloud: 91%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

N
N

3 / 4 mph 42 / 41°F 86% 1007 mb
Low level cloud: 96%
Mid level cloud: 49%
High level cloud: 45%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNW
NNW

6 / 8 mph 42 / 38°F 88% 1009 mb
Low level cloud: 86%
Mid level cloud: 80%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

7 / 8 mph 42 / 38°F 87% 1011 mb
Low level cloud: 93%
Mid level cloud: 59%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NW
NW

4 / 6 mph 41 / 39°F 81% 1013 mb
Low level cloud: 38%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 26
Nov
01:00

NW
NW

5 / 8 mph 38 / 35°F 84% 1014 mb
Low level cloud: 47%
Mid level cloud: 93%
High level cloud: 0%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

4 / 6 mph 37 / 35°F 86% 1015 mb
Low level cloud: 99%
Mid level cloud: 84%
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

NW
NW

3 / 5 mph 37 / 35°F 88% 1017 mb
Low level cloud: 69%
Mid level cloud: 59%
High level cloud: 0%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

N
N

3 / 4 mph 40 / 38°F 85% 1018 mb
Low level cloud: 85%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNE
NNE

3 / 4 mph 42 / 40°F 64% 1019 mb
Low level cloud: 78%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

N
N

3 / 4 mph 42 / 41°F 70% 1020 mb
Low level cloud: 13%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

0 / 0 mph 42 / 42°F 79% 1022 mb
Low level cloud: 6%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

3 / 4 mph 40 / 38°F 82% 1023 mb
Low level cloud: 9%
Mid level cloud: 6%
High level cloud: 2%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 27
Nov
01:00

SSW
SSW

4 / 5 mph 37 / 34°F 84% 1023 mb
Low level cloud: 11%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

4 / 6 mph 35 / 32°F 85% 1024 mb
Low level cloud: 6%
Mid level cloud: 1%
High level cloud: 28%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

4 / 8 mph 34 / 30°F 84% 1024 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
10:00

SSE
SSE

5 / 6 mph 38 / 34°F 75% 1025 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

S
S

7 / 10 mph 41 / 36°F 64% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 83%
Most Significant Cloud Type: high
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

6 / 10 mph 41 / 37°F 70% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: high
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

9 / 13 mph 39 / 34°F 80% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 92%
Most Significant Cloud Type: high
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

10 / 14 mph 38 / 31°F 79% 1023 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 32%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 28
Nov
01:00

SSE
SSE

10 / 15 mph 37 / 30°F 76% 1022 mb
Low level cloud: 41%
Mid level cloud: 19%
High level cloud: 2%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

11 / 16 mph 37 / 29°F 70% 1021 mb
Low level cloud: 73%
Mid level cloud: 16%
High level cloud: 1%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

11 / 18 mph 36 / 29°F 68% 1020 mb
Low level cloud: 96%
Mid level cloud: 27%
High level cloud: 7%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSE
SSE

12 / 18 mph 38 / 31°F 67% 1020 mb
Low level cloud: 98%
Mid level cloud: 80%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

10 / 14 mph 40 / 33°F 77% 1020 mb
Low level cloud: 100%
Mid level cloud: 98%
High level cloud: 81%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

7 / 10 mph 40 / 35°F 89% 1020 mb
Low level cloud: 100%
Mid level cloud: 44%
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

S
S

5 / 9 mph 40 / 36°F 91% 1021 mb
Low level cloud: 100%
Mid level cloud: 0%
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

S
S

5 / 10 mph 38 / 34°F 92% 1021 mb
Low level cloud: 99%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 29
Nov
01:00

S
S

5 / 8 mph 40 / 37°F 91% 1020 mb
Low level cloud: 92%
Mid level cloud: 1%
High level cloud: 14%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

6 / 9 mph 40 / 36°F 91% 1019 mb
Low level cloud: 52%
Mid level cloud: 4%
High level cloud: 84%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

8 / 13 mph 38 / 32°F 91% 1017 mb
Low level cloud: 32%
Mid level cloud: 13%
High level cloud: 3%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

7 / 11 mph 39 / 34°F 87% 1016 mb
Low level cloud: 14%
Mid level cloud: 7%
High level cloud: 7%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

9 / 13 mph 45 / 40°F 74% 1013 mb
Low level cloud: 51%
Mid level cloud: 41%
High level cloud: 32%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

10 / 16 mph 45 / 40°F 77% 1011 mb
Low level cloud: 50%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

11 / 15 mph 44 / 38°F 85% 1010 mb
Low level cloud: 98%
Mid level cloud: 70%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

8 / 12 mph 43 / 38°F 92% 1010 mb
Low level cloud: 100%
Mid level cloud: 94%
High level cloud: 29%
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
Sun 30
Nov
01:00

SE
SE

9 / 13 mph 42 / 37°F 61% 1021 mb
Low level cloud: 22%
Mid level cloud: 84%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
07:00

SSE
SSE

6 / 10 mph 48 / 45°F 96% 1020 mb
Low level cloud: 30%
Mid level cloud: 15%
High level cloud: 98%
Most Significant Cloud Type: low
46%
0.0 In
13:00

SW
SW

6 / 10 mph 52 / 50°F 75% 1017 mb
Low level cloud: 44%
Mid level cloud: 0%
High level cloud: 52%
Most Significant Cloud Type: low
50%
0.0 In
19:00

SSE
SSE

4 / 5 mph 52 / 51°F 67% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Mon 01
Dec
01:00

S
S

4 / 6 mph 40 / 37°F 65% 1024 mb
Low level cloud: 2%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
33%
0.0 In
07:00

SSE
SSE

4 / 6 mph 36 / 32°F 56% 1026 mb
Low level cloud: 4%
Mid level cloud: 66%
High level cloud: 0%
Most Significant Cloud Type: medium
75%
0.0 In
13:00

SSW
SSW

9 / 13 mph 47 / 43°F 62% 1022 mb
Low level cloud: 3%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: medium
55%
0.0 In
19:00

SW
SW

11 / 18 mph 46 / 41°F 88% 1019 mb
Low level cloud: 100%
Mid level cloud: 98%
High level cloud: 5%
Most Significant Cloud Type: low
100%
0.0 In
Tue 02
Dec
01:00

SSW
SSW

9 / 13 mph 47 / 43°F 82% 1022 mb
Low level cloud: 84%
Mid level cloud: 11%
High level cloud: 8%
Most Significant Cloud Type: low
89%
0.0 In
07:00

SW
SW

12 / 21 mph 48 / 44°F 91% 1021 mb
Low level cloud: 100%
Mid level cloud: 74%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
13:00

SW
SW

9 / 13 mph 54 / 51°F 69% 1024 mb
Low level cloud: 46%
Mid level cloud: 16%
High level cloud: 4%
Most Significant Cloud Type: low
52%
0.0 In
19:00

SW
SW

10 / 14 mph 53 / 49°F 89% 1023 mb
Low level cloud: 100%
Mid level cloud: 63%
High level cloud: 7%
Most Significant Cloud Type: low
100%
0.0 In
Wed 03
Dec
01:00

SSE
SSE

6 / 8 mph 52 / 50°F 86% 1025 mb
Low level cloud: 11%
Mid level cloud: 15%
High level cloud: 11%
Most Significant Cloud Type: low
17%
0.0 In
07:00

S
S

7 / 11 mph 52 / 49°F 85% 1022 mb
Low level cloud: 100%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
13:00

S
S

7 / 10 mph 49 / 46°F 76% 1023 mb
Low level cloud: 62%
Mid level cloud: 66%
High level cloud: 11%
Most Significant Cloud Type: low
86%
0.0 In
19:00

S
S

11 / 15 mph 55 / 52°F 76% 1019 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 48%
Most Significant Cloud Type: medium
48%
0.0 In
Thu 04
Dec
01:00

S
S

5 / 8 mph 49 / 46°F 76% 1026 mb
Low level cloud: 100%
Mid level cloud: 46%
High level cloud: 60%
Most Significant Cloud Type: low
100%
0.0 In
07:00

W
W

7 / 9 mph 49 / 46°F 81% 1027 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: medium
7%
0.0 In
13:00

S
S

4 / 5 mph 52 / 51°F 71% 1028 mb
Low level cloud: 87%
Mid level cloud: 4%
High level cloud: 66%
Most Significant Cloud Type: low
96%
0.0 In
19:00

E
E

1 / 1 mph 58 / 58°F 82% 1031 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: low
2%
0.0 In
Fri 05
Dec
01:00

ESE
ESE

4 / 5 mph 53 / 53°F 81% 1026 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 100%
Most Significant Cloud Type: medium
7%
0.0 In
07:00

ESE
ESE

5 / 7 mph 41 / 38°F 67% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 98%
Most Significant Cloud Type: high
98%
0.0 In
13:00

SE
SE

8 / 11 mph 50 / 46°F 64% 1020 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: medium
44%
0.0 In
19:00

SE
SE

10 / 14 mph 47 / 42°F 53% 1023 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 87%
Most Significant Cloud Type: medium
23%
0.0 In
Sat 06
Dec
01:00

ESE
ESE

6 / 8 mph 47 / 44°F 71% 1021 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 6%
Most Significant Cloud Type: medium
18%
0.0 In
07:00

SE
SE

9 / 13 mph 42 / 37°F 64% 1021 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: medium
32%
0.0 In
13:00

E
E

4 / 6 mph 48 / 46°F 53% 1028 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 55%
Most Significant Cloud Type: medium
29%
0.0 In
19:00

ESE
ESE

6 / 9 mph 47 / 44°F 53% 1025 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 87%
Most Significant Cloud Type: medium
47%
0.0 In
Sun 07
Dec
01:00

ENE
ENE

6 / 8 mph 45 / 42°F 70% 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

ENE
ENE

3 / 4 mph 43 / 42°F 50% 1026 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
0.0 In
13:00

ENE
ENE

4 / 6 mph 52 / 51°F 44% 1036 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: high
10%
0.0 In
19:00

ENE
ENE

9 / 13 mph 45 / 40°F 50% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Mon 08
Dec
01:00

E
E

5 / 7 mph 44 / 42°F 48% 1037 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

12 / 17 mph 30 / 21°F 37% 1028 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
13:00

ENE
ENE

4 / 6 mph 51 / 49°F 31% 1035 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
5%
0.0 In
19:00

ENE
ENE

15 / 21 mph 34 / 24°F 35% 1026 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In

Other Locations Near to Messe Duesseldorf

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