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Leesburg 14 Day Long Range Forecast

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

Virginia, United States Of America

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

The next 14 day outlook for Leesburg shows the average daytime maximum temperature will be around 26°C, with a high for the two weeks of 31°C expected on the afternoon of Wednesday 22nd. The average minimum temperature will be 14°C, dipping to its lowest on the morning of Saturday 25th at 7°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. The indicators are that Saturday 18th will have the most precipitation with an accumulation of around 20.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 17
May		01:00

NNE
NNE

 2 / 5 mph 57 / 58°F 96% 1012 mb
Low level cloud: 32%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

 4 / 8 mph 55 / 55°F 98% 1013 mb
Low level cloud: 59%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 3 / 4 mph 61 / 60°F 92% 1014 mb
Low level cloud: 97%
Mid level cloud: 8%
High level cloud: 12%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSE
SSE

 1 / 1 mph 67 / 67°F 75% 1015 mb
Low level cloud: 90%
Mid level cloud: 13%
High level cloud: 51%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 1 / 1 mph 71 / 70°F 71% 1014 mb
Low level cloud: 73%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 2 / 2 mph 70 / 68°F 87% 1014 mb
Low level cloud: 49%
Mid level cloud: 63%
High level cloud: 100%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

 3 / 3 mph 69 / 67°F 91% 1014 mb
Low level cloud: 55%
Mid level cloud: 60%
High level cloud: 45%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 5 / 6 mph 65 / 65°F 87% 1014 mb
Low level cloud: 100%
Mid level cloud: 83%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May		19:00

ENE
ENE

 4 / 4 mph 62 / 62°F 99% 1015 mb
Low level cloud: 98%
Mid level cloud: 82%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 3 / 3 mph 60 / 60°F 99% 1016 mb
Low level cloud: 100%
Mid level cloud: 88%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May		01:00

NE
NE

 3 / 4 mph 58 / 58°F 99% 1015 mb
Low level cloud: 100%
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
04:00

E
E

 3 / 4 mph 57 / 58°F 98% 1016 mb
Low level cloud: 100%
Mid level cloud: 78%
High level cloud: 21%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 2 / 3 mph 58 / 59°F 97% 1017 mb
Low level cloud: 96%
Mid level cloud: 85%
High level cloud: 3%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNE
NNE

 2 / 2 mph 62 / 61°F 89% 1017 mb
Low level cloud: 88%
Mid level cloud: 50%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

N
N

 3 / 3 mph 70 / 69°F 73% 1016 mb
Low level cloud: 83%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

 3 / 4 mph 74 / 76°F 71% 1015 mb
Low level cloud: 59%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

 3 / 5 mph 67 / 66°F 85% 1016 mb
Low level cloud: 15%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NW
NW

 1 / 2 mph 64 / 64°F 88% 1016 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		01:00

NNE
NNE

 2 / 4 mph 59 / 59°F 93% 1016 mb
Low level cloud: 5%
Mid level cloud: 40%
High level cloud: 0%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ESE
ESE

 2 / 4 mph 56 / 58°F 97% 1017 mb
Low level cloud: 42%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

 2 / 2 mph 62 / 61°F 95% 1018 mb
Low level cloud: 78%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ESE
ESE

 3 / 4 mph 68 / 67°F 81% 1018 mb
Low level cloud: 87%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ENE
ENE

 1 / 1 mph 80 / 78°F 62% 1017 mb
Low level cloud: 19%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

 0 / 0 mph 80 / 79°F 59% 1016 mb
Low level cloud: 14%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

 2 / 4 mph 74 / 76°F 76% 1016 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
22:00

S
S

 5 / 8 mph 67 / 67°F 90% 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
Tue 21
May		01:00

SSW
SSW

 5 / 11 mph 60 / 60°F 93% 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
04:00

SSW
SSW

 4 / 9 mph 57 / 56°F 95% 1016 mb
Low level cloud: 1%
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
07:00

SSW
SSW

 4 / 6 mph 65 / 63°F 86% 1017 mb
Low level cloud: 10%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 7 / 8 mph 76 / 77°F 65% 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
13:00

S
S

 6 / 7 mph 83 / 81°F 51% 1015 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
16:00

SSE
SSE

 6 / 8 mph 84 / 83°F 55% 1014 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

 8 / 17 mph 74 / 76°F 74% 1014 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 6 / 12 mph 64 / 64°F 87% 1015 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May		01:00

S
S

 6 / 11 mph 62 / 62°F 92% 1015 mb
Low level cloud: 7%
Mid level cloud: 11%
High level cloud: 28%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 5 / 10 mph 59 / 59°F 94% 1014 mb
Low level cloud: 15%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 6 / 7 mph 68 / 65°F 86% 1016 mb
Low level cloud: 14%
Mid level cloud: 9%
High level cloud: 16%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 8 / 9 mph 80 / 80°F 67% 1014 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
13:00

S
S

 8 / 9 mph 88 / 89°F 56% 1013 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 21%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 10 / 15 mph 87 / 90°F 61% 1011 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 83%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

 9 / 19 mph 78 / 79°F 71% 1010 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 71%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 13 / 23 mph 75 / 78°F 69% 1010 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 26%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May		01:00

SSW
SSW

 9 / 17 mph 71 / 71°F 79% 1009 mb
Low level cloud: 0%
Mid level cloud: 4%
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

SSW
SSW

 6 / 13 mph 66 / 65°F 93% 1009 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 5 / 9 mph 73 / 70°F 88% 1010 mb
Low level cloud: 15%
Mid level cloud: 16%
High level cloud: 35%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

W
W

 8 / 11 mph 78 / 78°F 81% 1010 mb
Low level cloud: 10%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

 10 / 11 mph 80 / 80°F 67% 1010 mb
Low level cloud: 57%
Mid level cloud: 27%
High level cloud: 58%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 6 / 9 mph 81 / 81°F 67% 1010 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNW
NNW

 8 / 15 mph 71 / 69°F 74% 1011 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

NW
NW

 9 / 17 mph 63 / 63°F 61% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: high
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 24
May		01:00

NW
NW

 5 / 9 mph 61 / 61°F 77% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: high
10%
0.0 In
07:00

NW
NW

 7 / 10 mph 66 / 66°F 71% 1013 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
13:00

SSW
SSW

 8 / 14 mph 84 / 84°F 43% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
19:00

SE
SE

 6 / 13 mph 73 / 77°F 69% 1014 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
Sat 25
May		01:00

NNE
NNE

 4 / 7 mph 67 / 67°F 86% 1016 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
07:00

NW
NW

 9 / 18 mph 59 / 59°F 75% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

NNW
NNW

 8 / 15 mph 71 / 71°F 50% 1018 mb
Low level cloud: 7%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
8%
0.0 In
19:00

ESE
ESE

 3 / 5 mph 71 / 71°F 68% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sun 26
May		01:00

SSE
SSE

 8 / 13 mph 56 / 55°F 73% 1019 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
07:00

S
S

 5 / 10 mph 59 / 59°F 70% 1026 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 9%
Most Significant Cloud Type: medium
3%
0.0 In
13:00

S
S

 9 / 15 mph 84 / 86°F 53% 1016 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 77%
Most Significant Cloud Type: medium
46%
0.0 In
19:00

SSE
SSE

 8 / 18 mph 69 / 69°F 67% 1021 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 5%
Most Significant Cloud Type: medium
21%
0.0 In
Mon 27
May		01:00

SSW
SSW

 3 / 6 mph 70 / 70°F 94% 1017 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 14%
Most Significant Cloud Type: medium
23%
0.2 In
07:00

SSW
SSW

 6 / 11 mph 68 / 68°F 88% 1018 mb
Low level cloud: 21%
Mid level cloud: 16%
High level cloud: 1%
Most Significant Cloud Type: low
27%
0.0 In
13:00

S
S

 7 / 12 mph 84 / 89°F 62% 1015 mb
Low level cloud: 31%
Mid level cloud: 29%
High level cloud: 2%
Most Significant Cloud Type: low
41%
0.0 In
19:00

WNW
WNW

 3 / 6 mph 74 / 78°F 89% 1013 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 15%
Most Significant Cloud Type: medium
44%
0.2 In
Tue 28
May		01:00

SW
SW

 5 / 10 mph 72 / 77°F 83% 1012 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 16%
Most Significant Cloud Type: medium
14%
0.1 In
07:00

NW
NW

 8 / 17 mph 68 / 68°F 91% 1014 mb
Low level cloud: 10%
Mid level cloud: 4%
High level cloud: 11%
Most Significant Cloud Type: low
12%
0.1 In
13:00

W
W

 8 / 15 mph 81 / 85°F 67% 1010 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 42%
Most Significant Cloud Type: medium
47%
0.0 In
19:00

NW
NW

 1 / 3 mph 77 / 80°F 76% 1012 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 100%
Most Significant Cloud Type: medium
27%
0.0 In
Wed 29
May		01:00

W
W

 4 / 9 mph 69 / 69°F 87% 1013 mb
Low level cloud: 7%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
9%
0.0 In
07:00

NNE
NNE

 3 / 6 mph 67 / 67°F 92% 1013 mb
Low level cloud: 12%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: medium
79%
0.1 In
13:00

WNW
WNW

 13 / 26 mph 81 / 81°F 42% 1014 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
19:00

NNE
NNE

 3 / 6 mph 66 / 66°F 98% 1012 mb
Low level cloud: 74%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
Thu 30
May		01:00

WNW
WNW

 6 / 12 mph 67 / 67°F 76% 1017 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: medium
4%
0.0 In
07:00

WNW
WNW

 2 / 3 mph 67 / 67°F 90% 1012 mb
Low level cloud: 23%
Mid level cloud: 69%
High level cloud: 22%
Most Significant Cloud Type: medium
100%
0.0 In
13:00

NNE
NNE

 6 / 12 mph 75 / 78°F 66% 1018 mb
Low level cloud: 94%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
19:00

SSW
SSW

 6 / 12 mph 68 / 68°F 91% 1009 mb
Low level cloud: 14%
Mid level cloud: 44%
High level cloud: 60%
Most Significant Cloud Type: medium
84%
0.3 In
Fri 31
May		01:00

NNE
NNE

 6 / 12 mph 60 / 60°F 96% 1019 mb
Low level cloud: 24%
Mid level cloud: 47%
High level cloud: 98%
Most Significant Cloud Type: low
52%
0.3 In
07:00

WNW
WNW

 8 / 17 mph 64 / 64°F 90% 1011 mb
Low level cloud: 7%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
7%
0.4 In
13:00

ENE
ENE

 8 / 17 mph 74 / 77°F 51% 1021 mb
Low level cloud: 30%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
30%
0.0 In
19:00

NW
NW

 4 / 9 mph 67 / 67°F 77% 1010 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
0.0 In
Sat 01
Jun		01:00

SSW
SSW

 4 / 8 mph 58 / 58°F 93% 1024 mb
Low level cloud: 1%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
2%
0.0 In
07:00

WNW
WNW

 8 / 16 mph 57 / 55°F 83% 1014 mb
Low level cloud: 18%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
22%
0.0 In
13:00

SSE
SSE

 9 / 18 mph 75 / 77°F 42% 1021 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 7%
Most Significant Cloud Type: medium
4%
0.0 In
19:00

WNW
WNW

 7 / 15 mph 61 / 62°F 68% 1014 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 5%
Most Significant Cloud Type: medium
25%
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