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Key West 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Key West

Florida, United States Of America

Long range weather outlook for Key West includes 14 day forecast summary:

The next 14 day outlook for Key West shows the average daytime maximum temperature will be around 33°C, with a high for the two weeks of 35°C expected on the afternoon of Monday 8th. The mean minimum temperature will be 28°C, dipping to its lowest on the morning of Saturday 6th at 26°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. Current predictions suggest Friday 5th will have the most precipitation with an accumulation of around 27.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 04
Sep		01:00

W
W

 13 / 24 mph 83 / 91°F 77% 1011 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 39%
Most Significant Cloud Type: medium
34%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
04:00

WSW
WSW

 14 / 27 mph 89 / 106°F 74% 1011 mb
Low level cloud: 36%
Mid level cloud: 17%
High level cloud: 8%
Most Significant Cloud Type: low
43%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
07:00

WSW
WSW

 11 / 18 mph 90 / 107°F 73% 1012 mb
Low level cloud: 65%
Mid level cloud: 12%
High level cloud: 6%
Most Significant Cloud Type: low
69%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

WSW
WSW

 13 / 26 mph 85 / 92°F 76% 1013 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: medium
46%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
13:00

W
W

 18 / 38 mph 89 / 112°F 90% 1012 mb
Low level cloud: 27%
Mid level cloud: 46%
High level cloud: 89%
Most Significant Cloud Type: low
53%
Expect 0.5 In of precipitation over the past 3 hours.
0.5 In
16:00

WNW
WNW

 15 / 18 mph 87 / 102°F 91% 1011 mb
Low level cloud: 35%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: low
63%
Expect 0.5 In of precipitation over the past 3 hours.
0.5 In
19:00

SSW
SSW

 12 / 13 mph 84 / 90°F 78% 1010 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 96%
Most Significant Cloud Type: medium
47%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
22:00

SW
SW

 9 / 17 mph 80 / 84°F 74% 1012 mb
Low level cloud: 2%
Mid level cloud: 22%
High level cloud: 28%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 05
Sep		19:00

SSW
SSW

 11 / 17 mph 86 / 92°F 71% 1013 mb
Low level cloud: 3%
Mid level cloud: 36%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

SSW
SSW

 15 / 24 mph 82 / 88°F 75% 1015 mb
Low level cloud: 4%
Mid level cloud: 25%
High level cloud: 38%
Most Significant Cloud Type: medium
36%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Sat 06
Sep		01:00

SSW
SSW

 17 / 33 mph 80 / 84°F 72% 1014 mb
Low level cloud: 32%
Mid level cloud: 25%
High level cloud: 9%
Most Significant Cloud Type: low
41%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
04:00

SW
SW

 15 / 32 mph 78 / 82°F 73% 1013 mb
Low level cloud: 60%
Mid level cloud: 29%
High level cloud: 4%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 12 / 25 mph 78 / 82°F 73% 1014 mb
Low level cloud: 69%
Mid level cloud: 28%
High level cloud: 1%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 8 / 13 mph 85 / 88°F 73% 1016 mb
Low level cloud: 23%
Mid level cloud: 22%
High level cloud: 5%
Most Significant Cloud Type: low
31%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
13:00

S
S

 14 / 28 mph 87 / 97°F 77% 1015 mb
Low level cloud: 10%
Mid level cloud: 43%
High level cloud: 39%
Most Significant Cloud Type: medium
72%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
16:00

WSW
WSW

 6 / 13 mph 89 / 101°F 83% 1015 mb
Low level cloud: 26%
Mid level cloud: 51%
High level cloud: 100%
Most Significant Cloud Type: low
56%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
19:00

SSW
SSW

 5 / 6 mph 88 / 96°F 84% 1015 mb
Low level cloud: 4%
Mid level cloud: 43%
High level cloud: 45%
Most Significant Cloud Type: medium
56%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

S
S

 6 / 9 mph 81 / 87°F 75% 1016 mb
Low level cloud: 0%
Mid level cloud: 39%
High level cloud: 13%
Most Significant Cloud Type: medium
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 07
Sep		01:00

S
S

 8 / 12 mph 81 / 86°F 72% 1015 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 13%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 6 / 11 mph 80 / 83°F 69% 1014 mb
Low level cloud: 10%
Mid level cloud: 23%
High level cloud: 11%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

 2 / 5 mph 80 / 83°F 67% 1015 mb
Low level cloud: 11%
Mid level cloud: 19%
High level cloud: 8%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 3 / 4 mph 87 / 90°F 68% 1016 mb
Low level cloud: 2%
Mid level cloud: 22%
High level cloud: 17%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 4 / 5 mph 90 / 97°F 67% 1015 mb
Low level cloud: 4%
Mid level cloud: 32%
High level cloud: 2%
Most Significant Cloud Type: medium
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 4 / 6 mph 89 / 98°F 65% 1014 mb
Low level cloud: 12%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: medium
80%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

NW
NW

 3 / 3 mph 89 / 94°F 66% 1015 mb
Low level cloud: 20%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNW
NNW

 2 / 3 mph 83 / 89°F 66% 1016 mb
Low level cloud: 8%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 08
Sep		01:00

SSW
SSW

 1 / 2 mph 85 / 92°F 67% 1015 mb
Low level cloud: 8%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

 3 / 6 mph 84 / 90°F 71% 1014 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 2%
Most Significant Cloud Type: medium
29%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
07:00

NNW
NNW

 5 / 7 mph 83 / 89°F 70% 1014 mb
Low level cloud: 1%
Mid level cloud: 25%
High level cloud: 10%
Most Significant Cloud Type: medium
27%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

N
N

 6 / 6 mph 90 / 98°F 67% 1016 mb
Low level cloud: 2%
Mid level cloud: 22%
High level cloud: 4%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

N
N

 5 / 6 mph 94 / 108°F 66% 1014 mb
Low level cloud: 22%
Mid level cloud: 24%
High level cloud: 2%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

N
N

 6 / 6 mph 95 / 110°F 67% 1013 mb
Low level cloud: 34%
Mid level cloud: 24%
High level cloud: 1%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNE
NNE

 5 / 6 mph 92 / 104°F 69% 1013 mb
Low level cloud: 11%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 6 / 11 mph 87 / 97°F 72% 1014 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 4%
Most Significant Cloud Type: medium
24%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
Tue 09
Sep		01:00

E
E

 6 / 9 mph 85 / 92°F 68% 1013 mb
Low level cloud: 1%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
04:00

ESE
ESE

 6 / 9 mph 83 / 89°F 68% 1012 mb
Low level cloud: 36%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

 8 / 11 mph 83 / 89°F 70% 1013 mb
Low level cloud: 49%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SE
SE

 5 / 6 mph 90 / 98°F 70% 1014 mb
Low level cloud: 18%
Mid level cloud: 15%
High level cloud: 5%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

 2 / 3 mph 93 / 107°F 68% 1013 mb
Low level cloud: 5%
Mid level cloud: 17%
High level cloud: 15%
Most Significant Cloud Type: medium
31%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

NNE
NNE

 4 / 7 mph 94 / 107°F 66% 1012 mb
Low level cloud: 0%
Mid level cloud: 40%
High level cloud: 100%
Most Significant Cloud Type: medium
44%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

ENE
ENE

 5 / 6 mph 92 / 101°F 65% 1013 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 21%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

 9 / 10 mph 86 / 95°F 69% 1014 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 21%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 10
Sep		01:00

SE
SE

 11 / 16 mph 84 / 91°F 72% 1013 mb
Low level cloud: 28%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
54%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
04:00

SSE
SSE

 10 / 16 mph 83 / 88°F 72% 1012 mb
Low level cloud: 54%
Mid level cloud: 46%
High level cloud: 38%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

 7 / 10 mph 83 / 89°F 74% 1014 mb
Low level cloud: 19%
Mid level cloud: 13%
High level cloud: 32%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSE
SSE

 4 / 5 mph 89 / 94°F 72% 1015 mb
Low level cloud: 8%
Mid level cloud: 25%
High level cloud: 33%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 2 / 3 mph 90 / 99°F 71% 1015 mb
Low level cloud: 3%
Mid level cloud: 30%
High level cloud: 7%
Most Significant Cloud Type: medium
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ESE
ESE

 2 / 2 mph 91 / 99°F 68% 1014 mb
Low level cloud: 3%
Mid level cloud: 27%
High level cloud: 3%
Most Significant Cloud Type: medium
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

 4 / 5 mph 89 / 97°F 68% 1015 mb
Low level cloud: 7%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 6 / 8 mph 85 / 92°F 69% 1015 mb
Low level cloud: 7%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 11
Sep		01:00

ENE
ENE

 15 / 31 mph 85 / 93°F 70% 1013 mb
Low level cloud: 6%
Mid level cloud: 23%
High level cloud: 14%
Most Significant Cloud Type: medium
40%
0.0 In
07:00

N
N

 4 / 8 mph 85 / 92°F 69% 1012 mb
Low level cloud: 52%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
54%
0.0 In
13:00

W
W

 4 / 8 mph 90 / 105°F 67% 1012 mb
Low level cloud: 28%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
30%
0.0 In
19:00

NW
NW

 8 / 17 mph 86 / 95°F 70% 1011 mb
Low level cloud: 43%
Mid level cloud: 6%
High level cloud: 16%
Most Significant Cloud Type: low
47%
0.0 In
Fri 12
Sep		01:00

ENE
ENE

 6 / 12 mph 83 / 88°F 66% 1011 mb
Low level cloud: 21%
Mid level cloud: 14%
High level cloud: 17%
Most Significant Cloud Type: low
28%
0.0 In
07:00

ESE
ESE

 6 / 12 mph 82 / 87°F 70% 1012 mb
Low level cloud: 6%
Mid level cloud: 27%
High level cloud: 18%
Most Significant Cloud Type: medium
43%
0.0 In
13:00

NE
NE

 8 / 17 mph 88 / 100°F 72% 1014 mb
Low level cloud: 5%
Mid level cloud: 22%
High level cloud: 17%
Most Significant Cloud Type: medium
37%
0.0 In
19:00

ESE
ESE

 7 / 15 mph 85 / 93°F 68% 1012 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 67%
Most Significant Cloud Type: medium
48%
0.0 In
Sat 13
Sep		01:00

ESE
ESE

 10 / 21 mph 84 / 90°F 68% 1011 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 16%
Most Significant Cloud Type: medium
22%
0.0 In
07:00

ENE
ENE

 9 / 18 mph 76 / 80°F 85% 1012 mb
Low level cloud: 15%
Mid level cloud: 50%
High level cloud: 32%
Most Significant Cloud Type: medium
94%
0.7 In
13:00

ENE
ENE

 4 / 9 mph 88 / 100°F 72% 1012 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 32%
Most Significant Cloud Type: medium
21%
0.1 In
19:00

SE
SE

 9 / 19 mph 83 / 88°F 70% 1011 mb
Low level cloud: 16%
Mid level cloud: 62%
High level cloud: 97%
Most Significant Cloud Type: medium
100%
0.3 In
Sun 14
Sep		01:00

E
E

 12 / 26 mph 84 / 91°F 72% 1011 mb
Low level cloud: 32%
Mid level cloud: 21%
High level cloud: 10%
Most Significant Cloud Type: low
40%
0.0 In
07:00

SSE
SSE

 20 / 42 mph 79 / 84°F 80% 1011 mb
Low level cloud: 47%
Mid level cloud: 43%
High level cloud: 91%
Most Significant Cloud Type: low
72%
0.4 In
13:00

E
E

 7 / 14 mph 87 / 99°F 74% 1010 mb
Low level cloud: 26%
Mid level cloud: 21%
High level cloud: 17%
Most Significant Cloud Type: low
35%
0.0 In
19:00

SSW
SSW

 13 / 28 mph 82 / 90°F 79% 1012 mb
Low level cloud: 0%
Mid level cloud: 58%
High level cloud: 34%
Most Significant Cloud Type: medium
59%
0.3 In
Mon 15
Sep		01:00

ESE
ESE

 11 / 24 mph 84 / 91°F 73% 1011 mb
Low level cloud: 36%
Mid level cloud: 22%
High level cloud: 8%
Most Significant Cloud Type: low
44%
0.2 In
07:00

SE
SE

 14 / 29 mph 83 / 91°F 76% 1013 mb
Low level cloud: 80%
Mid level cloud: 11%
High level cloud: 1%
Most Significant Cloud Type: low
83%
0.0 In
13:00

SE
SE

 7 / 15 mph 86 / 96°F 72% 1012 mb
Low level cloud: 28%
Mid level cloud: 11%
High level cloud: 2%
Most Significant Cloud Type: low
32%
0.0 In
19:00

ESE
ESE

 11 / 22 mph 86 / 96°F 74% 1013 mb
Low level cloud: 20%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
Tue 16
Sep		01:00

ESE
ESE

 7 / 14 mph 85 / 94°F 73% 1011 mb
Low level cloud: 2%
Mid level cloud: 15%
High level cloud: 6%
Most Significant Cloud Type: medium
19%
0.1 In
07:00

ENE
ENE

 11 / 23 mph 84 / 92°F 75% 1013 mb
Low level cloud: 47%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
48%
0.0 In
13:00

S
S

 3 / 6 mph 92 / 109°F 68% 1011 mb
Low level cloud: 6%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
11%
0.0 In
19:00

NNE
NNE

 19 / 40 mph 89 / 104°F 73% 1009 mb
Low level cloud: 19%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
27%
0.1 In
Wed 17
Sep		01:00

SE
SE

 3 / 7 mph 87 / 97°F 69% 1010 mb
Low level cloud: 18%
Mid level cloud: 14%
High level cloud: 2%
Most Significant Cloud Type: low
23%
0.0 In
07:00

NW
NW

 38 / 79 mph 82 / 91°F 85% 1003 mb
Low level cloud: 86%
Mid level cloud: 20%
High level cloud: 33%
Most Significant Cloud Type: low
97%
0.1 In
13:00

SSW
SSW

 4 / 9 mph 90 / 105°F 70% 1010 mb
Low level cloud: 13%
Mid level cloud: 15%
High level cloud: 4%
Most Significant Cloud Type: low
18%
0.0 In
19:00

WSW
WSW

 31 / 65 mph 85 / 100°F 86% 1006 mb
Low level cloud: 91%
Mid level cloud: 72%
High level cloud: 33%
Most Significant Cloud Type: low
100%
1.2 In
Thu 18
Sep		01:00

NNW
NNW

 1 / 2 mph 86 / 96°F 72% 1010 mb
Low level cloud: 31%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
37%
0.1 In
07:00

SW
SW

 27 / 57 mph 81 / 87°F 79% 1008 mb
Low level cloud: 62%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
89%
1.3 In
13:00

WSW
WSW

 9 / 19 mph 87 / 99°F 73% 1010 mb
Low level cloud: 69%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
72%
0.2 In
19:00

SW
SW

 15 / 32 mph 84 / 92°F 71% 1009 mb
Low level cloud: 11%
Mid level cloud: 33%
High level cloud: 95%
Most Significant Cloud Type: medium
67%
0.5 In
Fri 19
Sep		01:00

WNW
WNW

 5 / 10 mph 84 / 92°F 72% 1011 mb
Low level cloud: 12%
Mid level cloud: 13%
High level cloud: 16%
Most Significant Cloud Type: low
18%
0.1 In
07:00

WSW
WSW

 9 / 19 mph 80 / 85°F 74% 1012 mb
Low level cloud: 16%
Mid level cloud: 65%
High level cloud: 78%
Most Significant Cloud Type: medium
100%
0.4 In
13:00

SW
SW

 15 / 31 mph 86 / 98°F 76% 1012 mb
Low level cloud: 53%
Mid level cloud: 32%
High level cloud: 32%
Most Significant Cloud Type: low
68%
0.0 In
19:00

NNW
NNW

 8 / 17 mph 84 / 93°F 80% 1013 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 3%
Most Significant Cloud Type: medium
48%
0.4 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