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Douai 14 Day Long Range Forecast

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

France

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

The forecast for Douai in the coming two weeks is predicting the average daytime maximum temperature will be around 29°C, with a high for the two weeks of 38°C expected on the afternoon of Tuesday 1st. The average minimum temperature will be 15°C, dipping to its lowest on the morning of Wednesday 9th at 11°C. The fortnight ahead will have mostly dry days although Wednesday is likely to see a little rain. Predictions are Wednesday 2nd will have the most precipitation with an accumulation of around 1.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 01
Jul		19:00

WNW
WNW

 11 / 13 mph 93 / 93°F 34% 1013 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 11%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WNW
WNW

 4 / 9 mph 79 / 78°F 54% 1015 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 9%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 02
Jul		01:00

NW
NW

 5 / 10 mph 72 / 76°F 62% 1015 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

 4 / 7 mph 69 / 69°F 62% 1013 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNW
NNW

 6 / 8 mph 74 / 76°F 62% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

N
N

 6 / 6 mph 84 / 82°F 47% 1014 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

 12 / 14 mph 91 / 90°F 37% 1014 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 11%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNW
NNW

 15 / 20 mph 76 / 78°F 68% 1016 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 33%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NW
NW

 13 / 15 mph 72 / 76°F 69% 1018 mb
Low level cloud: 60%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

N
N

 8 / 11 mph 68 / 66°F 77% 1021 mb
Low level cloud: 3%
Mid level cloud: 9%
High level cloud: 42%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 03
Jul		01:00

NNW
NNW

 7 / 10 mph 63 / 63°F 92% 1023 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNW
NNW

 7 / 11 mph 58 / 57°F 94% 1024 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

N
N

 8 / 10 mph 62 / 61°F 66% 1026 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

N
N

 9 / 11 mph 71 / 70°F 40% 1027 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

N
N

 10 / 11 mph 78 / 76°F 28% 1027 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

NNW
NNW

 11 / 13 mph 79 / 76°F 26% 1026 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNW
NNW

 13 / 15 mph 76 / 75°F 30% 1026 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

 6 / 11 mph 67 / 65°F 41% 1027 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 04
Jul		01:00

N
N

 5 / 8 mph 59 / 59°F 51% 1027 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

 0 / 1 mph 55 / 55°F 57% 1027 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 3 / 4 mph 63 / 61°F 45% 1027 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

 6 / 7 mph 77 / 75°F 33% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 14%
Most Significant Cloud Type: high
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NW
NW

 8 / 9 mph 82 / 77°F 25% 1026 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNW
NNW

 9 / 10 mph 82 / 78°F 24% 1024 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNW
NNW

 8 / 9 mph 80 / 77°F 31% 1024 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NW
NW

 6 / 13 mph 65 / 64°F 44% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 82%
Most Significant Cloud Type: high
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 05
Jul		01:00

W
W

 5 / 10 mph 58 / 57°F 57% 1023 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

 5 / 11 mph 55 / 54°F 68% 1022 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 6 / 9 mph 64 / 62°F 59% 1020 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 7%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 9 / 11 mph 78 / 76°F 34% 1019 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 85%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 12 / 14 mph 85 / 80°F 21% 1016 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 14 / 16 mph 87 / 82°F 19% 1013 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 3%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

 15 / 17 mph 77 / 76°F 29% 1012 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 7 / 12 mph 65 / 62°F 47% 1012 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 21%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 06
Jul		01:00

SSW
SSW

 6 / 9 mph 61 / 61°F 63% 1011 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 97%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 11 / 16 mph 59 / 59°F 72% 1010 mb
Low level cloud: 95%
Mid level cloud: 43%
High level cloud: 34%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 12 / 16 mph 62 / 62°F 81% 1009 mb
Low level cloud: 92%
Mid level cloud: 21%
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

W
W

 15 / 17 mph 68 / 67°F 55% 1010 mb
Low level cloud: 48%
Mid level cloud: 1%
High level cloud: 93%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 17 / 20 mph 73 / 75°F 42% 1010 mb
Low level cloud: 23%
Mid level cloud: 66%
High level cloud: 66%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 18 / 20 mph 72 / 75°F 40% 1010 mb
Low level cloud: 1%
Mid level cloud: 58%
High level cloud: 0%
Most Significant Cloud Type: medium
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 18 / 21 mph 69 / 68°F 50% 1011 mb
Low level cloud: 14%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 12 / 18 mph 62 / 60°F 74% 1012 mb
Low level cloud: 3%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 07
Jul		01:00

WSW
WSW

 10 / 17 mph 57 / 55°F 84% 1013 mb
Low level cloud: 6%
Mid level cloud: 18%
High level cloud: 63%
Most Significant Cloud Type: medium
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

 9 / 16 mph 55 / 52°F 88% 1013 mb
Low level cloud: 3%
Mid level cloud: 11%
High level cloud: 7%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

 11 / 13 mph 60 / 59°F 73% 1015 mb
Low level cloud: 11%
Mid level cloud: 2%
High level cloud: 11%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

W
W

 12 / 14 mph 71 / 69°F 41% 1015 mb
Low level cloud: 11%
Mid level cloud: 7%
High level cloud: 2%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

 15 / 17 mph 77 / 75°F 29% 1014 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 17 / 19 mph 74 / 75°F 34% 1014 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 14 / 16 mph 69 / 67°F 49% 1014 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 9 / 13 mph 61 / 61°F 73% 1014 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 08
Jul		01:00

SW
SW

 7 / 13 mph 56 / 54°F 90% 1011 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
0.0 In
07:00

SE
SE

 4 / 6 mph 65 / 65°F 59% 1023 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 2%
Most Significant Cloud Type: medium
3%
0.0 In
13:00

SSW
SSW

 3 / 5 mph 79 / 78°F 35% 1013 mb
Low level cloud: 0%
Mid level cloud: 79%
High level cloud: 52%
Most Significant Cloud Type: medium
80%
0.0 In
19:00

WNW
WNW

 15 / 24 mph 75 / 75°F 31% 1013 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 94%
Most Significant Cloud Type: medium
14%
0.0 In
Wed 09
Jul		01:00

SW
SW

 4 / 8 mph 54 / 53°F 81% 1020 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 14%
Most Significant Cloud Type: medium
25%
0.0 In
07:00

W
W

 6 / 13 mph 60 / 60°F 68% 1022 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 9%
Most Significant Cloud Type: medium
13%
0.0 In
13:00

W
W

 11 / 17 mph 85 / 82°F 27% 1022 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 3%
Most Significant Cloud Type: medium
17%
0.0 In
19:00

N
N

 8 / 15 mph 74 / 76°F 44% 1021 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: medium
8%
0.0 In
Thu 10
Jul		01:00

WSW
WSW

 9 / 14 mph 61 / 61°F 93% 1019 mb
Low level cloud: 26%
Mid level cloud: 14%
High level cloud: 11%
Most Significant Cloud Type: low
32%
0.0 In
07:00

WSW
WSW

 7 / 12 mph 63 / 64°F 76% 1021 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
13:00

WSW
WSW

 16 / 22 mph 81 / 81°F 42% 1018 mb
Low level cloud: 64%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
83%
0.0 In
19:00

N
N

 11 / 19 mph 75 / 78°F 52% 1020 mb
Low level cloud: 2%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
0.0 In
Fri 11
Jul		01:00

WSW
WSW

 11 / 16 mph 63 / 64°F 88% 1018 mb
Low level cloud: 7%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
8%
0.0 In
07:00

N
N

 1 / 2 mph 68 / 68°F 74% 1020 mb
Low level cloud: 8%
Mid level cloud: 46%
High level cloud: 4%
Most Significant Cloud Type: medium
68%
0.0 In
13:00

W
W

 17 / 23 mph 83 / 82°F 39% 1018 mb
Low level cloud: 16%
Mid level cloud: 8%
High level cloud: 7%
Most Significant Cloud Type: low
19%
0.0 In
19:00

NNE
NNE

 6 / 11 mph 78 / 80°F 55% 1018 mb
Low level cloud: 3%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
53%
0.0 In
Sat 12
Jul		01:00

W
W

 6 / 8 mph 67 / 67°F 91% 1020 mb
Low level cloud: 1%
Mid level cloud: 5%
High level cloud: 5%
Most Significant Cloud Type: medium
6%
0.0 In
07:00

NE
NE

 2 / 3 mph 75 / 78°F 75% 1019 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 26%
Most Significant Cloud Type: medium
15%
0.0 In
13:00

W
W

 11 / 15 mph 89 / 88°F 31% 1020 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 28%
Most Significant Cloud Type: medium
5%
0.0 In
19:00

NNW
NNW

 3 / 5 mph 81 / 83°F 54% 1018 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: medium
47%
0.0 In
Sun 13
Jul		01:00

W
W

 4 / 6 mph 72 / 76°F 77% 1021 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
07:00

NNW
NNW

 3 / 6 mph 76 / 79°F 66% 1020 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
13:00

NW
NW

 6 / 8 mph 99 / 99°F 25% 1020 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
19:00

NNW
NNW

 11 / 21 mph 86 / 86°F 37% 1019 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 5%
Most Significant Cloud Type: medium
14%
0.0 In
Mon 14
Jul		01:00

NNW
NNW

 4 / 6 mph 79 / 81°F 59% 1019 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 1%
Most Significant Cloud Type: medium
19%
0.0 In
07:00

NNE
NNE

 3 / 5 mph 76 / 78°F 54% 1021 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
0.0 In
13:00

NNW
NNW

 11 / 15 mph 95 / 94°F 27% 1018 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
19:00

N
N

 14 / 26 mph 88 / 87°F 33% 1019 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
Tue 15
Jul		01:00

N
N

 3 / 5 mph 74 / 77°F 63% 1019 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
07:00

ENE
ENE

 9 / 16 mph 75 / 78°F 62% 1019 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 2%
Most Significant Cloud Type: medium
7%
0.0 In
13:00

N
N

 8 / 12 mph 93 / 91°F 25% 1018 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 18%
Most Significant Cloud Type: medium
29%
0.0 In
19:00

N
N

 16 / 30 mph 85 / 84°F 35% 1016 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
Wed 16
Jul		01:00

NNE
NNE

 12 / 20 mph 67 / 67°F 53% 1021 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 1%
Most Significant Cloud Type: medium
8%
0.0 In
07:00

NE
NE

 11 / 20 mph 70 / 70°F 66% 1016 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 2%
Most Significant Cloud Type: medium
44%
0.0 In
13:00

NE
NE

 13 / 19 mph 88 / 84°F 21% 1019 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
19:00

NNE
NNE

 15 / 27 mph 90 / 88°F 29% 1013 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
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