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Antwerp 14 Day Long Range Forecast

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

Belgium

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

Taking a look at Antwerp over the coming two weeks and the average daytime maximum temperature will be around 9°C, with a high for the two weeks of 12°C expected on the afternoon of Thursday 18th. The average minimum temperature will be 5°C, dipping to its lowest on the morning of Wednesday 24th at 3°C. The fortnight ahead will have mostly dry days although Friday 19th and Saturday 20th are likely to see a little rain. Predictions are Saturday 20th will have the most precipitation with an accumulation of around 4.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 16
Dec		19:00

SSE
SSE

 4 / 6 mph 52 / 51°F 56% 1013 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 34%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 5 / 7 mph 50 / 49°F 72% 1014 mb
Low level cloud: 31%
Mid level cloud: 46%
High level cloud: 10%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 17
Dec		01:00

SSW
SSW

 6 / 9 mph 47 / 44°F 91% 1015 mb
Low level cloud: 98%
Mid level cloud: 34%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 5 / 10 mph 46 / 43°F 93% 1015 mb
Low level cloud: 91%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 5 / 10 mph 46 / 43°F 95% 1016 mb
Low level cloud: 98%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 6 / 9 mph 48 / 46°F 93% 1018 mb
Low level cloud: 76%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

 6 / 8 mph 50 / 47°F 87% 1018 mb
Low level cloud: 97%
Mid level cloud: 4%
High level cloud: 2%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

 5 / 6 mph 51 / 49°F 92% 1018 mb
Low level cloud: 28%
Mid level cloud: 0%
High level cloud: 99%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 7 / 9 mph 50 / 47°F 90% 1018 mb
Low level cloud: 14%
Mid level cloud: 3%
High level cloud: 100%
Most Significant Cloud Type: low
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 9 / 13 mph 48 / 44°F 84% 1019 mb
Low level cloud: 2%
Mid level cloud: 55%
High level cloud: 33%
Most Significant Cloud Type: medium
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 18
Dec		01:00

SSW
SSW

 12 / 17 mph 48 / 43°F 87% 1017 mb
Low level cloud: 14%
Mid level cloud: 44%
High level cloud: 48%
Most Significant Cloud Type: medium
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 15 / 27 mph 47 / 40°F 80% 1017 mb
Low level cloud: 0%
Mid level cloud: 54%
High level cloud: 100%
Most Significant Cloud Type: medium
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

 15 / 29 mph 47 / 40°F 76% 1016 mb
Low level cloud: 34%
Mid level cloud: 59%
High level cloud: 13%
Most Significant Cloud Type: low
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 15 / 20 mph 50 / 45°F 77% 1017 mb
Low level cloud: 100%
Mid level cloud: 100%
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

S
S

 13 / 15 mph 54 / 49°F 77% 1015 mb
Low level cloud: 82%
Mid level cloud: 67%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 15 / 20 mph 54 / 50°F 74% 1012 mb
Low level cloud: 4%
Mid level cloud: 31%
High level cloud: 1%
Most Significant Cloud Type: medium
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 18 / 35 mph 52 / 46°F 63% 1011 mb
Low level cloud: 0%
Mid level cloud: 42%
High level cloud: 20%
Most Significant Cloud Type: medium
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 17 / 36 mph 49 / 43°F 65% 1011 mb
Low level cloud: 1%
Mid level cloud: 75%
High level cloud: 100%
Most Significant Cloud Type: medium
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 19
Dec		01:00

SSW
SSW

 18 / 27 mph 52 / 47°F 79% 1011 mb
Low level cloud: 98%
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
04:00

SSW
SSW

 14 / 21 mph 52 / 47°F 88% 1013 mb
Low level cloud: 93%
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
07:00

W
W

 11 / 16 mph 51 / 46°F 75% 1015 mb
Low level cloud: 12%
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

WSW
WSW

 8 / 12 mph 48 / 45°F 68% 1018 mb
Low level cloud: 0%
Mid level cloud: 47%
High level cloud: 1%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

 9 / 11 mph 51 / 47°F 64% 1019 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 15%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

 7 / 11 mph 50 / 47°F 71% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 96%
Most Significant Cloud Type: high
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 6 / 10 mph 46 / 44°F 83% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 19%
Most Significant Cloud Type: high
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 5 / 10 mph 44 / 41°F 88% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: high
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 20
Dec		01:00

SSW
SSW

 4 / 8 mph 43 / 40°F 89% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 34%
Most Significant Cloud Type: high
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 4 / 7 mph 42 / 40°F 89% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 85%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ESE
ESE

 5 / 9 mph 41 / 38°F 87% 1015 mb
Low level cloud: 0%
Mid level cloud: 52%
High level cloud: 100%
Most Significant Cloud Type: medium
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

 4 / 6 mph 44 / 41°F 79% 1014 mb
Low level cloud: 88%
Mid level cloud: 100%
High level cloud: 87%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

 4 / 4 mph 46 / 44°F 90% 1012 mb
Low level cloud: 99%
Mid level cloud: 81%
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

ESE
ESE

 4 / 5 mph 46 / 45°F 95% 1009 mb
Low level cloud: 99%
Mid level cloud: 78%
High level cloud: 6%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 4 / 8 mph 45 / 43°F 98% 1009 mb
Low level cloud: 94%
Mid level cloud: 73%
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

S
S

 4 / 8 mph 43 / 41°F 98% 1008 mb
Low level cloud: 100%
Mid level cloud: 61%
High level cloud: 62%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 21
Dec		01:00

SSW
SSW

 6 / 11 mph 44 / 41°F 94% 1009 mb
Low level cloud: 46%
Mid level cloud: 7%
High level cloud: 33%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 5 / 9 mph 43 / 41°F 93% 1009 mb
Low level cloud: 9%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SE
SE

 5 / 11 mph 43 / 40°F 93% 1010 mb
Low level cloud: 5%
Mid level cloud: 41%
High level cloud: 75%
Most Significant Cloud Type: medium
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ESE
ESE

 6 / 10 mph 47 / 43°F 93% 1011 mb
Low level cloud: 20%
Mid level cloud: 18%
High level cloud: 51%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ESE
ESE

 5 / 7 mph 49 / 47°F 86% 1010 mb
Low level cloud: 11%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

E
E

 6 / 10 mph 49 / 47°F 92% 1010 mb
Low level cloud: 79%
Mid level cloud: 68%
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

E
E

 7 / 14 mph 48 / 45°F 93% 1010 mb
Low level cloud: 44%
Mid level cloud: 61%
High level cloud: 100%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 7 / 14 mph 46 / 42°F 88% 1011 mb
Low level cloud: 6%
Mid level cloud: 99%
High level cloud: 75%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 22
Dec		01:00

ESE
ESE

 6 / 12 mph 43 / 39°F 82% 1011 mb
Low level cloud: 7%
Mid level cloud: 94%
High level cloud: 33%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ESE
ESE

 6 / 13 mph 42 / 38°F 81% 1011 mb
Low level cloud: 0%
Mid level cloud: 50%
High level cloud: 100%
Most Significant Cloud Type: medium
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

E
E

 6 / 13 mph 41 / 37°F 83% 1010 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 90%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

 5 / 9 mph 45 / 42°F 82% 1011 mb
Low level cloud: 1%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ENE
ENE

 6 / 9 mph 48 / 45°F 72% 1010 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 100%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NE
NE

 6 / 9 mph 48 / 45°F 84% 1009 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 100%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

 7 / 9 mph 47 / 43°F 90% 1008 mb
Low level cloud: 12%
Mid level cloud: 6%
High level cloud: 39%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 8 / 9 mph 44 / 40°F 89% 1008 mb
Low level cloud: 22%
Mid level cloud: 39%
High level cloud: 34%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 23
Dec		01:00

NE
NE

 6 / 7 mph 41 / 38°F 92% 1013 mb
Low level cloud: 18%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: low
33%
0.0 In
07:00

NE
NE

 9 / 12 mph 34 / 27°F 90% 1015 mb
Low level cloud: 25%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
24%
0.0 In
13:00

N
N

 3 / 4 mph 49 / 48°F 86% 1018 mb
Low level cloud: 28%
Mid level cloud: 100%
High level cloud: 37%
Most Significant Cloud Type: medium
100%
0.0 In
19:00

SW
SW

 6 / 8 mph 44 / 40°F 81% 1027 mb
Low level cloud: 93%
Mid level cloud: 60%
High level cloud: 34%
Most Significant Cloud Type: low
100%
0.0 In
Wed 24
Dec		01:00

NE
NE

 14 / 30 mph 38 / 30°F 78% 1017 mb
Low level cloud: 90%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
90%
0.0 In
07:00

NE
NE

 14 / 19 mph 37 / 28°F 75% 1021 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 15%
Most Significant Cloud Type: medium
4%
0.0 In
13:00

NE
NE

 15 / 20 mph 43 / 35°F 81% 1017 mb
Low level cloud: 99%
Mid level cloud: 13%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
19:00

NE
NE

 11 / 15 mph 40 / 33°F 87% 1017 mb
Low level cloud: 99%
Mid level cloud: 12%
High level cloud: 5%
Most Significant Cloud Type: low
100%
0.0 In
Thu 25
Dec		01:00

NE
NE

 7 / 9 mph 39 / 34°F 84% 1020 mb
Low level cloud: 80%
Mid level cloud: 14%
High level cloud: 9%
Most Significant Cloud Type: low
86%
0.0 In
07:00

NE
NE

 9 / 12 mph 35 / 29°F 84% 1020 mb
Low level cloud: 90%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
13:00

ENE
ENE

 10 / 13 mph 41 / 35°F 79% 1025 mb
Low level cloud: 45%
Mid level cloud: 10%
High level cloud: 4%
Most Significant Cloud Type: low
49%
0.0 In
19:00

NE
NE

 7 / 10 mph 39 / 34°F 84% 1024 mb
Low level cloud: 83%
Mid level cloud: 11%
High level cloud: 2%
Most Significant Cloud Type: low
86%
0.0 In
Fri 26
Dec		01:00

ENE
ENE

 11 / 21 mph 39 / 32°F 73% 1027 mb
Low level cloud: 96%
Mid level cloud: 15%
High level cloud: 13%
Most Significant Cloud Type: low
100%
0.0 In
07:00

NE
NE

 6 / 9 mph 39 / 35°F 90% 1024 mb
Low level cloud: 97%
Mid level cloud: 32%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
13:00

ENE
ENE

 13 / 18 mph 42 / 35°F 83% 1027 mb
Low level cloud: 100%
Mid level cloud: 43%
High level cloud: 43%
Most Significant Cloud Type: low
100%
0.0 In
19:00

NE
NE

 5 / 7 mph 41 / 38°F 90% 1024 mb
Low level cloud: 71%
Mid level cloud: 89%
High level cloud: 31%
Most Significant Cloud Type: low
100%
0.0 In
Sat 27
Dec		01:00

ENE
ENE

 12 / 18 mph 39 / 32°F 74% 1026 mb
Low level cloud: 87%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
88%
0.0 In
07:00

NE
NE

 4 / 6 mph 42 / 39°F 93% 1024 mb
Low level cloud: 93%
Mid level cloud: 100%
High level cloud: 20%
Most Significant Cloud Type: low
100%
0.0 In
13:00

NE
NE

 11 / 14 mph 41 / 35°F 75% 1023 mb
Low level cloud: 57%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
72%
0.0 In
19:00

NE
NE

 5 / 6 mph 44 / 41°F 89% 1025 mb
Low level cloud: 66%
Mid level cloud: 100%
High level cloud: 2%
Most Significant Cloud Type: low
100%
0.0 In
Sun 28
Dec		01:00

NNE
NNE

 7 / 9 mph 37 / 31°F 88% 1023 mb
Low level cloud: 14%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
14%
0.0 In
07:00

NNE
NNE

 4 / 5 mph 41 / 39°F 85% 1025 mb
Low level cloud: 62%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
64%
0.0 In
13:00

NE
NE

 15 / 19 mph 36 / 27°F 65% 1026 mb
Low level cloud: 49%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
49%
0.0 In
19:00

N
N

 3 / 4 mph 43 / 42°F 82% 1025 mb
Low level cloud: 67%
Mid level cloud: 100%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.0 In
Mon 29
Dec		01:00

NE
NE

 10 / 13 mph 32 / 24°F 74% 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

NE
NE

 4 / 5 mph 39 / 36°F 97% 1026 mb
Low level cloud: 64%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
79%
0.0 In
13:00

NE
NE

 4 / 6 mph 39 / 36°F 47% 1030 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
19:00

NE
NE

 3 / 4 mph 42 / 41°F 75% 1025 mb
Low level cloud: 96%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Tue 30
Dec		01:00

WSW
WSW

 4 / 5 mph 36 / 32°F 74% 1028 mb
Low level cloud: 100%
Mid level cloud: 81%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
07:00

NE
NE

 5 / 8 mph 36 / 32°F 76% 1026 mb
Low level cloud: 22%
Mid level cloud: 12%
High level cloud: 8%
Most Significant Cloud Type: low
27%
0.0 In
13:00

NNE
NNE

 4 / 6 mph 41 / 38°F 78% 1028 mb
Low level cloud: 83%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: low
83%
0.0 In
19:00

NE
NE

 6 / 9 mph 41 / 36°F 80% 1026 mb
Low level cloud: 5%
Mid level cloud: 3%
High level cloud: 17%
Most Significant Cloud Type: low
8%
0.0 In
Wed 31
Dec		01:00

W
W

 5 / 7 mph 40 / 37°F 85% 1028 mb
Low level cloud: 89%
Mid level cloud: 7%
High level cloud: 4%
Most Significant Cloud Type: low
91%
0.0 In
07:00

N
N

 3 / 4 mph 36 / 33°F 80% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
0.0 In
13:00

NW
NW

 7 / 10 mph 45 / 41°F 83% 1024 mb
Low level cloud: 49%
Mid level cloud: 45%
High level cloud: 92%
Most Significant Cloud Type: low
75%
0.0 In
19:00

WNW
WNW

 9 / 16 mph 41 / 35°F 86% 1012 mb
Low level cloud: 78%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In

Other Locations Near to Antwerp

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