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Derrylin 14 Day Long Range Forecast

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

County Fermanagh, United Kingdom

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

Over the next 14 days the Derrylin forecast suggests the average daytime maximum temperature will be around 5°C, with a high for the two weeks of 9°C expected on the afternoon of Monday 22nd. The mean minimum temperature will be 0°C, dipping to its lowest on the morning of Monday 29th at -3°C. Expect the coming 14 days to have mixed overhead conditions with some days dry and some seeing a significant amount of rain. The indicators are that Sunday 21st will have the most precipitation with an accumulation of around 10.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 21
Dec		18:00

NNE
NNE

 3 / 4 mph 45 / 44°F 98% 1008 mb
Low level cloud: 85%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 3 / 5 mph 43 / 42°F 98% 1009 mb
Low level cloud: 97%
Mid level cloud: 88%
High level cloud: 18%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 22
Dec		00:00

NE
NE

 4 / 7 mph 43 / 41°F 98% 1008 mb
Low level cloud: 99%
Mid level cloud: 52%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 4 / 8 mph 41 / 38°F 98% 1007 mb
Low level cloud: 90%
Mid level cloud: 62%
High level cloud: 18%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

 4 / 7 mph 40 / 38°F 98% 1006 mb
Low level cloud: 96%
Mid level cloud: 44%
High level cloud: 18%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 3 / 5 mph 43 / 42°F 99% 1006 mb
Low level cloud: 99%
Mid level cloud: 70%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 2 / 4 mph 46 / 46°F 99% 1006 mb
Low level cloud: 99%
Mid level cloud: 64%
High level cloud: 12%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 2 / 4 mph 48 / 48°F 99% 1007 mb
Low level cloud: 99%
Mid level cloud: 45%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

 3 / 5 mph 46 / 45°F 99% 1009 mb
Low level cloud: 91%
Mid level cloud: 30%
High level cloud: 76%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 3 / 5 mph 44 / 43°F 97% 1012 mb
Low level cloud: 37%
Mid level cloud: 48%
High level cloud: 19%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 23
Dec		00:00

E
E

 2 / 4 mph 42 / 42°F 97% 1014 mb
Low level cloud: 33%
Mid level cloud: 17%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 2 / 4 mph 40 / 40°F 98% 1015 mb
Low level cloud: 86%
Mid level cloud: 96%
High level cloud: 72%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

 2 / 5 mph 39 / 38°F 98% 1016 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 77%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 3 / 6 mph 42 / 41°F 99% 1019 mb
Low level cloud: 96%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 2 / 4 mph 45 / 45°F 98% 1022 mb
Low level cloud: 76%
Mid level cloud: 100%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 2 / 4 mph 47 / 47°F 97% 1024 mb
Low level cloud: 61%
Mid level cloud: 73%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

 3 / 4 mph 46 / 45°F 98% 1027 mb
Low level cloud: 59%
Mid level cloud: 73%
High level cloud: 10%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 2 / 4 mph 43 / 42°F 97% 1030 mb
Low level cloud: 44%
Mid level cloud: 83%
High level cloud: 5%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 24
Dec		00:00

NE
NE

 2 / 5 mph 39 / 38°F 98% 1032 mb
Low level cloud: 44%
Mid level cloud: 5%
High level cloud: 3%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 3 / 6 mph 38 / 35°F 98% 1034 mb
Low level cloud: 60%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 3 / 5 mph 38 / 36°F 98% 1034 mb
Low level cloud: 57%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 2 / 5 mph 36 / 35°F 98% 1036 mb
Low level cloud: 45%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 3 / 3 mph 43 / 42°F 95% 1037 mb
Low level cloud: 50%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

 2 / 4 mph 42 / 41°F 98% 1037 mb
Low level cloud: 49%
Mid level cloud: 3%
High level cloud: 3%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

 2 / 5 mph 36 / 35°F 98% 1037 mb
Low level cloud: 37%
Mid level cloud: 4%
High level cloud: 8%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 2 / 5 mph 34 / 33°F 97% 1038 mb
Low level cloud: 15%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 25
Dec		00:00

E
E

 2 / 5 mph 33 / 31°F 97% 1038 mb
Low level cloud: 17%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

 2 / 5 mph 32 / 31°F 97% 1038 mb
Low level cloud: 30%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 3 / 6 mph 32 / 30°F 98% 1037 mb
Low level cloud: 27%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 2 / 5 mph 31 / 30°F 97% 1037 mb
Low level cloud: 21%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 3 / 4 mph 39 / 38°F 94% 1036 mb
Low level cloud: 27%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 2 / 4 mph 38 / 37°F 96% 1035 mb
Low level cloud: 53%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

 3 / 6 mph 36 / 34°F 92% 1034 mb
Low level cloud: 52%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 2 / 5 mph 31 / 30°F 96% 1035 mb
Low level cloud: 19%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 26
Dec		00:00

NE
NE

 2 / 4 mph 31 / 31°F 98% 1035 mb
Low level cloud: 47%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 2 / 4 mph 30 / 28°F 98% 1035 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
06:00

NE
NE

 2 / 4 mph 28 / 28°F 98% 1035 mb
Low level cloud: 27%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

 2 / 4 mph 32 / 31°F 97% 1037 mb
Low level cloud: 17%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNW
NNW

 2 / 3 mph 35 / 35°F 90% 1037 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNW
NNW

 3 / 4 mph 37 / 35°F 93% 1038 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
18:00

N
N

 3 / 5 mph 36 / 34°F 96% 1039 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNW
NNW

 3 / 6 mph 33 / 30°F 96% 1041 mb
Low level cloud: 83%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 27
Dec		00:00

NE
NE

 4 / 7 mph 31 / 28°F 97% 1041 mb
Low level cloud: 22%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

 3 / 7 mph 30 / 26°F 97% 1042 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NE
NE

 5 / 10 mph 33 / 29°F 94% 1043 mb
Low level cloud: 87%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 7 / 11 mph 40 / 36°F 88% 1044 mb
Low level cloud: 59%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

 7 / 10 mph 43 / 39°F 85% 1045 mb
Low level cloud: 55%
Mid level cloud: 0%
High level cloud: 13%
Most Significant Cloud Type: low
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 6 / 10 mph 42 / 38°F 92% 1044 mb
Low level cloud: 76%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

 6 / 11 mph 41 / 37°F 92% 1045 mb
Low level cloud: 90%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 5 / 9 mph 40 / 36°F 94% 1046 mb
Low level cloud: 31%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 28
Dec		00:00

N
N

 3 / 7 mph 32 / 28°F 96% 1034 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
6%
0.0 In
06:00

NE
NE

 6 / 12 mph 31 / 26°F 82% 1034 mb
Low level cloud: 54%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
54%
0.0 In
12:00

NNE
NNE

 2 / 3 mph 42 / 41°F 90% 1042 mb
Low level cloud: 18%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
18%
0.0 In
18:00

NNE
NNE

 3 / 4 mph 39 / 37°F 95% 1040 mb
Low level cloud: 25%
Mid level cloud: 1%
High level cloud: 9%
Most Significant Cloud Type: low
26%
0.0 In
Mon 29
Dec		00:00

NW
NW

 4 / 8 mph 33 / 30°F 98% 1046 mb
Low level cloud: 31%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
31%
0.0 In
06:00

E
E

 1 / 2 mph 30 / 30°F 86% 1039 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
0.0 In
12:00

ENE
ENE

 2 / 2 mph 43 / 43°F 93% 1035 mb
Low level cloud: 46%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
46%
0.0 In
18:00

N
N

 4 / 5 mph 45 / 43°F 95% 1036 mb
Low level cloud: 18%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
18%
0.0 In
Tue 30
Dec		00:00

NNW
NNW

 2 / 4 mph 34 / 34°F 95% 1041 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 17%
Most Significant Cloud Type: high
17%
0.0 In
06:00

NNW
NNW

 6 / 13 mph 39 / 35°F 84% 1035 mb
Low level cloud: 64%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
64%
0.0 In
12:00

NW
NW

 2 / 2 mph 43 / 43°F 93% 1039 mb
Low level cloud: 18%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
17%
0.0 In
18:00

NNW
NNW

 6 / 8 mph 45 / 42°F 84% 1032 mb
Low level cloud: 88%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: low
88%
0.0 In
Wed 31
Dec		00:00

WNW
WNW

 2 / 4 mph 34 / 33°F 97% 1037 mb
Low level cloud: 17%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
17%
0.0 In
06:00

NW
NW

 6 / 12 mph 40 / 36°F 72% 1026 mb
Low level cloud: 64%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
64%
0.0 In
12:00

WNW
WNW

 4 / 7 mph 42 / 40°F 88% 1033 mb
Low level cloud: 77%
Mid level cloud: 3%
High level cloud: 19%
Most Significant Cloud Type: low
80%
0.0 In
18:00

W
W

 11 / 15 mph 46 / 40°F 78% 1009 mb
Low level cloud: 35%
Mid level cloud: 66%
High level cloud: 0%
Most Significant Cloud Type: low
58%
0.1 In
Thu 01
Jan		00:00

WNW
WNW

 5 / 10 mph 38 / 34°F 94% 1027 mb
Low level cloud: 26%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.0 In
06:00

NW
NW

 6 / 11 mph 34 / 29°F 90% 1003 mb
Low level cloud: 17%
Mid level cloud: 28%
High level cloud: 6%
Most Significant Cloud Type: low
27%
0.2 In
12:00

NNW
NNW

 9 / 12 mph 42 / 37°F 72% 1024 mb
Low level cloud: 48%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
54%
0.0 In
18:00

N
N

 6 / 10 mph 38 / 34°F 87% 1002 mb
Low level cloud: 3%
Mid level cloud: 46%
High level cloud: 45%
Most Significant Cloud Type: medium
54%
0.0 In
Fri 02
Jan		00:00

N
N

 7 / 15 mph 35 / 29°F 79% 1024 mb
Low level cloud: 13%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.0 In
06:00

NW
NW

 4 / 8 mph 28 / 24°F 91% 1001 mb
Low level cloud: 0%
Mid level cloud: 55%
High level cloud: 44%
Most Significant Cloud Type: medium
56%
0.0 In
12:00

NNW
NNW

 2 / 3 mph 41 / 40°F 76% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

NW
NW

 3 / 5 mph 36 / 33°F 91% 1002 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
Sat 03
Jan		00:00

WNW
WNW

 6 / 11 mph 40 / 35°F 81% 1021 mb
Low level cloud: 83%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: low
83%
0.0 In
06:00

NNW
NNW

 3 / 7 mph 29 / 25°F 89% 1004 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
0.0 In
12:00

N
N

 9 / 12 mph 41 / 36°F 79% 1017 mb
Low level cloud: 1%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
33%
0.0 In
18:00

NW
NW

 3 / 5 mph 36 / 33°F 83% 1004 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
Sun 04
Jan		00:00

NNW
NNW

 3 / 6 mph 31 / 29°F 84% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

ENE
ENE

 2 / 3 mph 28 / 27°F 87% 1004 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
12:00

SW
SW

 1 / 2 mph 41 / 41°F 66% 1024 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 18%
Most Significant Cloud Type: medium
7%
0.0 In
18:00

NNE
NNE

 3 / 5 mph 33 / 29°F 97% 1007 mb
Low level cloud: 30%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
35%
0.0 In
Mon 05
Jan		00:00

SSE
SSE

 2 / 5 mph 29 / 26°F 83% 1021 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 22%
Most Significant Cloud Type: medium
100%
0.0 In
06:00

N
N

 3 / 6 mph 26 / 23°F 91% 1013 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
12:00

SE
SE

 4 / 5 mph 37 / 34°F 87% 1017 mb
Low level cloud: 96%
Mid level cloud: 15%
High level cloud: 44%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WSW
WSW

 2 / 3 mph 34 / 34°F 94% 1018 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 6%
Most Significant Cloud Type: high
6%
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

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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