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Guiseley 14 Day Long Range Forecast

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

North Yorkshire, United Kingdom

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

The outlook for Guiseley in the two weeks ahead shows 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 Saturday 22nd. The average minimum temperature will be 4°C, dipping to its lowest on the morning of Saturday 1st at 1°C. The coming 14 days will have some days seeing a little precipitation and some days with rain. The indicators are that Wednesday 26th will have the most precipitation with an accumulation of around 8.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 22
Feb		18:00

WSW
WSW

 11 / 15 mph 47 / 42°F 80% 1014 mb
Low level cloud: 1%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 7 / 11 mph 46 / 42°F 84% 1017 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 23
Feb		00:00

SW
SW

 7 / 12 mph 42 / 38°F 89% 1018 mb
Low level cloud: 8%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 9 / 16 mph 41 / 35°F 89% 1017 mb
Low level cloud: 10%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

 11 / 18 mph 42 / 36°F 82% 1015 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 76%
Most Significant Cloud Type: medium
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 18 / 26 mph 46 / 39°F 75% 1014 mb
Low level cloud: 14%
Mid level cloud: 63%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 24 / 33 mph 48 / 40°F 75% 1010 mb
Low level cloud: 33%
Mid level cloud: 85%
High level cloud: 100%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 23 / 32 mph 49 / 41°F 84% 1007 mb
Low level cloud: 98%
Mid level cloud: 70%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 21 / 31 mph 50 / 43°F 87% 1006 mb
Low level cloud: 97%
Mid level cloud: 90%
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

SW
SW

 16 / 24 mph 50 / 44°F 86% 1007 mb
Low level cloud: 23%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: low
51%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Mon 24
Feb		00:00

SW
SW

 17 / 25 mph 48 / 42°F 82% 1007 mb
Low level cloud: 78%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 16 / 23 mph 48 / 41°F 83% 1007 mb
Low level cloud: 51%
Mid level cloud: 21%
High level cloud: 91%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 13 / 19 mph 46 / 40°F 86% 1007 mb
Low level cloud: 62%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 12 / 15 mph 48 / 43°F 83% 1008 mb
Low level cloud: 44%
Mid level cloud: 100%
High level cloud: 59%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 15 / 17 mph 52 / 47°F 68% 1007 mb
Low level cloud: 31%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

 13 / 15 mph 50 / 45°F 71% 1007 mb
Low level cloud: 23%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 7 / 9 mph 45 / 42°F 83% 1009 mb
Low level cloud: 7%
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
21:00

SW
SW

 4 / 7 mph 42 / 39°F 88% 1009 mb
Low level cloud: 2%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 25
Feb		00:00

SW
SW

 7 / 12 mph 41 / 36°F 90% 1009 mb
Low level cloud: 20%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

 8 / 14 mph 40 / 34°F 89% 1009 mb
Low level cloud: 44%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

 9 / 15 mph 38 / 32°F 90% 1010 mb
Low level cloud: 55%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

 11 / 13 mph 41 / 35°F 83% 1011 mb
Low level cloud: 56%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 12 / 14 mph 44 / 38°F 92% 1012 mb
Low level cloud: 95%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 14 / 16 mph 46 / 39°F 78% 1011 mb
Low level cloud: 82%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 13 / 15 mph 44 / 38°F 85% 1013 mb
Low level cloud: 52%
Mid level cloud: 26%
High level cloud: 74%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 12 / 15 mph 42 / 35°F 85% 1015 mb
Low level cloud: 4%
Mid level cloud: 27%
High level cloud: 32%
Most Significant Cloud Type: medium
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 26
Feb		00:00

W
W

 12 / 19 mph 39 / 31°F 87% 1016 mb
Low level cloud: 5%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

 11 / 18 mph 37 / 30°F 87% 1017 mb
Low level cloud: 3%
Mid level cloud: 8%
High level cloud: 41%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

 11 / 18 mph 37 / 29°F 91% 1017 mb
Low level cloud: 27%
Mid level cloud: 2%
High level cloud: 39%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 8 / 10 mph 40 / 35°F 83% 1017 mb
Low level cloud: 8%
Mid level cloud: 100%
High level cloud: 43%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 11 / 12 mph 47 / 41°F 70% 1015 mb
Low level cloud: 21%
Mid level cloud: 43%
High level cloud: 49%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 12 / 14 mph 47 / 41°F 75% 1011 mb
Low level cloud: 88%
Mid level cloud: 100%
High level cloud: 97%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

 7 / 9 mph 43 / 39°F 95% 1006 mb
Low level cloud: 100%
Mid level cloud: 50%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
21:00

WNW
WNW

 22 / 28 mph 39 / 29°F 88% 1009 mb
Low level cloud: 89%
Mid level cloud: 36%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 27
Feb		00:00

WNW
WNW

 20 / 27 mph 40 / 31°F 76% 1011 mb
Low level cloud: 43%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

 18 / 27 mph 37 / 28°F 77% 1014 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
06:00

WNW
WNW

 15 / 25 mph 36 / 27°F 75% 1016 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
09:00

WNW
WNW

 13 / 17 mph 40 / 32°F 71% 1019 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
12:00

WNW
WNW

 13 / 14 mph 46 / 40°F 55% 1020 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
15:00

NW
NW

 10 / 12 mph 47 / 42°F 53% 1021 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 8%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 4 / 7 mph 41 / 38°F 72% 1022 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 7%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 4 / 6 mph 38 / 35°F 79% 1024 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 27%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 28
Feb		00:00

W
W

 3 / 6 mph 35 / 33°F 82% 1024 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

 3 / 6 mph 34 / 32°F 83% 1023 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

 2 / 3 mph 34 / 34°F 85% 1023 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 2 / 3 mph 39 / 38°F 75% 1024 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
12:00

SE
SE

 7 / 8 mph 45 / 41°F 58% 1022 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
15:00

SSE
SSE

 9 / 10 mph 47 / 42°F 53% 1020 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

SE
SE

 7 / 13 mph 40 / 35°F 69% 1020 mb
Low level cloud: 11%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

 7 / 11 mph 37 / 32°F 81% 1020 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 16%
Most Significant Cloud Type: high
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 01
Mar		00:00

SW
SW

 13 / 21 mph 37 / 29°F 72% 1011 mb
Low level cloud: 0%
Mid level cloud: 71%
High level cloud: 67%
Most Significant Cloud Type: medium
73%
0.0 In
06:00

SW
SW

 22 / 35 mph 44 / 35°F 78% 975 mb
Low level cloud: 66%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
71%
0.2 In
12:00

W
W

 18 / 26 mph 40 / 31°F 86% 995 mb
Low level cloud: 63%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
70%
0.1 In
18:00

WNW
WNW

 19 / 26 mph 45 / 38°F 75% 1006 mb
Low level cloud: 26%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
29%
0.0 In
Sun 02
Mar		00:00

WSW
WSW

 9 / 13 mph 45 / 40°F 88% 1021 mb
Low level cloud: 16%
Mid level cloud: 3%
High level cloud: 10%
Most Significant Cloud Type: low
18%
0.0 In
06:00

N
N

 14 / 24 mph 38 / 29°F 92% 1003 mb
Low level cloud: 92%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ENE
ENE

 14 / 19 mph 39 / 31°F 96% 1017 mb
Low level cloud: 100%
Mid level cloud: 97%
High level cloud: 34%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WSW
WSW

 17 / 22 mph 50 / 44°F 73% 1019 mb
Low level cloud: 8%
Mid level cloud: 26%
High level cloud: 97%
Most Significant Cloud Type: medium
52%
0.0 In
Mon 03
Mar		00:00

WSW
WSW

 14 / 18 mph 44 / 37°F 82% 1017 mb
Low level cloud: 13%
Mid level cloud: 48%
High level cloud: 34%
Most Significant Cloud Type: medium
86%
0.0 In
06:00

WNW
WNW

 12 / 21 mph 42 / 35°F 82% 1016 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 49%
Most Significant Cloud Type: low
21%
0.1 In
12:00

W
W

 16 / 21 mph 48 / 41°F 55% 1018 mb
Low level cloud: 31%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: low
31%
0.0 In
18:00

WSW
WSW

 21 / 27 mph 47 / 39°F 72% 1014 mb
Low level cloud: 13%
Mid level cloud: 3%
High level cloud: 21%
Most Significant Cloud Type: low
16%
0.0 In
Tue 04
Mar		00:00

WSW
WSW

 16 / 21 mph 43 / 36°F 79% 1022 mb
Low level cloud: 9%
Mid level cloud: 5%
High level cloud: 10%
Most Significant Cloud Type: low
12%
0.0 In
06:00

W
W

 21 / 30 mph 42 / 32°F 87% 1012 mb
Low level cloud: 89%
Mid level cloud: 39%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.1 In
12:00

WSW
WSW

 22 / 30 mph 46 / 38°F 73% 1022 mb
Low level cloud: 86%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
87%
0.0 In
18:00

W
W

 20 / 32 mph 46 / 38°F 86% 1017 mb
Low level cloud: 71%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Wed 05
Mar		00:00

WSW
WSW

 22 / 31 mph 46 / 38°F 83% 1021 mb
Low level cloud: 17%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
29%
0.0 In
06:00

W
W

 19 / 27 mph 45 / 37°F 90% 1017 mb
Low level cloud: 46%
Mid level cloud: 25%
High level cloud: 80%
Most Significant Cloud Type: low
64%
0.0 In
12:00

W
W

 21 / 28 mph 51 / 45°F 74% 1021 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: medium
4%
0.0 In
18:00

WSW
WSW

 16 / 26 mph 50 / 45°F 86% 1016 mb
Low level cloud: 26%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.0 In
Thu 06
Mar		00:00

WSW
WSW

 10 / 19 mph 42 / 37°F 83% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

SW
SW

 23 / 31 mph 50 / 43°F 75% 1009 mb
Low level cloud: 86%
Mid level cloud: 19%
High level cloud: 98%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSW
SSW

 11 / 15 mph 57 / 54°F 42% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

WSW
WSW

 9 / 13 mph 43 / 37°F 73% 1020 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
50%
0.0 In
Fri 07
Mar		00:00

SSW
SSW

 5 / 8 mph 46 / 44°F 77% 1010 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
4%
0.0 In
06:00

WSW
WSW

 12 / 17 mph 40 / 33°F 80% 1017 mb
Low level cloud: 9%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
12%
0.0 In
12:00

SW
SW

 8 / 10 mph 53 / 51°F 64% 1008 mb
Low level cloud: 45%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: low
48%
0.0 In
18:00

SSW
SSW

 18 / 25 mph 45 / 37°F 72% 1007 mb
Low level cloud: 30%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
58%
0.0 In
Sat 08
Mar		00:00

NNE
NNE

 6 / 8 mph 46 / 43°F 88% 1008 mb
Low level cloud: 92%
Mid level cloud: 68%
High level cloud: 82%
Most Significant Cloud Type: low
100%
0.0 In
06:00

WSW
WSW

 16 / 23 mph 36 / 26°F 94% 992 mb
Low level cloud: 91%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
98%
0.2 In
12:00

NNW
NNW

 12 / 16 mph 36 / 28°F 98% 1007 mb
Low level cloud: 92%
Mid level cloud: 49%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.5 In
18:00

W
W

 24 / 35 mph 41 / 31°F 81% 992 mb
Low level cloud: 87%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
98%
0.0 In
Sun 09
Mar		00:00

NW
NW

 16 / 21 mph 37 / 27°F 98% 1007 mb
Low level cloud: 87%
Mid level cloud: 64%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.5 In
06:00

WNW
WNW

 20 / 30 mph 40 / 31°F 79% 997 mb
Low level cloud: 87%
Mid level cloud: 56%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
12:00

N
N

 16 / 22 mph 39 / 31°F 88% 1012 mb
Low level cloud: 99%
Mid level cloud: 99%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
18:00

WNW
WNW

 17 / 25 mph 46 / 40°F 80% 1003 mb
Low level cloud: 79%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
86%
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