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San Miguel 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for San Miguel

El Salvador

Long range weather outlook for San Miguel includes 14 day forecast summary:

Over the next 14 days the San Miguel forecast suggests the average daytime maximum temperature will be around 37°C, with a high for the two weeks of 38°C expected on the afternoon of Tuesday 7th. The average minimum temperature will be 25°C, dipping to its lowest on the morning of Monday 6th at 23°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. The current forecast indicates Monday 29th will have the most precipitation with an accumulation of around 15.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 28
Apr
00:00

SSW
SSW

1 / 2 mph 81 / 86°F 78% 1011 mb
Low level cloud: 4%
Mid level cloud: 65%
High level cloud: 0%
Most Significant Cloud Type: medium
77%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

SSW
SSW

1 / 2 mph 77 / 81°F 79% 1010 mb
Low level cloud: 14%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

0 / 0 mph 81 / 81°F 82% 1011 mb
Low level cloud: 46%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

1 / 1 mph 93 / 98°F 55% 1012 mb
Low level cloud: 25%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

2 / 3 mph 99 / 106°F 43% 1010 mb
Low level cloud: 2%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: medium
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

5 / 6 mph 97 / 103°F 48% 1007 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

4 / 4 mph 90 / 97°F 63% 1007 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
21:00

SSW
SSW

3 / 4 mph 84 / 93°F 78% 1010 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 29
Apr
18:00

WSW
WSW

4 / 5 mph 88 / 95°F 74% 1008 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

2 / 3 mph 81 / 88°F 85% 1011 mb
Low level cloud: 10%
Mid level cloud: 29%
High level cloud: 76%
Most Significant Cloud Type: medium
59%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Tue 30
Apr
00:00

WNW
WNW

2 / 3 mph 79 / 85°F 90% 1011 mb
Low level cloud: 6%
Mid level cloud: 25%
High level cloud: 18%
Most Significant Cloud Type: medium
41%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

NNW
NNW

2 / 4 mph 77 / 81°F 90% 1010 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 86%
Most Significant Cloud Type: medium
53%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

ENE
ENE

2 / 4 mph 79 / 80°F 91% 1011 mb
Low level cloud: 13%
Mid level cloud: 28%
High level cloud: 21%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

3 / 3 mph 89 / 96°F 69% 1012 mb
Low level cloud: 27%
Mid level cloud: 29%
High level cloud: 5%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

3 / 3 mph 98 / 107°F 49% 1010 mb
Low level cloud: 41%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

3 / 3 mph 98 / 108°F 50% 1007 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

5 / 6 mph 89 / 95°F 72% 1008 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

2 / 2 mph 83 / 93°F 81% 1010 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 12%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 01
May
00:00

WNW
WNW

2 / 4 mph 79 / 86°F 88% 1010 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

0 / 0 mph 78 / 83°F 89% 1009 mb
Low level cloud: 7%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

1 / 2 mph 80 / 82°F 88% 1010 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
09:00

ESE
ESE

4 / 5 mph 91 / 98°F 64% 1011 mb
Low level cloud: 8%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

S
S

4 / 6 mph 96 / 105°F 52% 1010 mb
Low level cloud: 31%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

7 / 8 mph 95 / 104°F 56% 1007 mb
Low level cloud: 14%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

4 / 5 mph 89 / 95°F 73% 1008 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
21:00

WSW
WSW

1 / 2 mph 80 / 87°F 87% 1010 mb
Low level cloud: 2%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Thu 02
May
00:00

WNW
WNW

2 / 3 mph 78 / 83°F 89% 1010 mb
Low level cloud: 2%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

2 / 3 mph 76 / 81°F 90% 1008 mb
Low level cloud: 2%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

2 / 4 mph 79 / 79°F 88% 1010 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

3 / 4 mph 92 / 99°F 60% 1010 mb
Low level cloud: 6%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

3 / 3 mph 97 / 105°F 47% 1008 mb
Low level cloud: 3%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: medium
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

7 / 8 mph 94 / 104°F 55% 1006 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

5 / 6 mph 88 / 93°F 71% 1007 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
21:00

WSW
WSW

1 / 1 mph 80 / 86°F 83% 1009 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 03
May
00:00

NW
NW

2 / 3 mph 78 / 82°F 86% 1009 mb
Low level cloud: 2%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

2 / 3 mph 76 / 81°F 89% 1008 mb
Low level cloud: 2%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

1 / 2 mph 79 / 80°F 88% 1009 mb
Low level cloud: 3%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

2 / 2 mph 94 / 100°F 55% 1010 mb
Low level cloud: 4%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

2 / 3 mph 100 / 107°F 41% 1008 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

9 / 10 mph 96 / 103°F 50% 1006 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

5 / 6 mph 88 / 92°F 68% 1007 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

2 / 2 mph 81 / 87°F 79% 1009 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 04
May
00:00

WNW
WNW

2 / 2 mph 79 / 84°F 82% 1009 mb
Low level cloud: 1%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

2 / 3 mph 77 / 81°F 85% 1008 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

2 / 3 mph 80 / 80°F 84% 1009 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

3 / 3 mph 94 / 100°F 52% 1010 mb
Low level cloud: 6%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

4 / 5 mph 97 / 104°F 44% 1008 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

7 / 8 mph 96 / 104°F 50% 1007 mb
Low level cloud: 1%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

5 / 6 mph 88 / 94°F 65% 1008 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

2 / 3 mph 80 / 85°F 82% 1010 mb
Low level cloud: 0%
Mid level cloud: 36%
High level cloud: 0%
Most Significant Cloud Type: medium
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 05
May
00:00

NW
NW

1 / 3 mph 81 / 89°F 85% 1009 mb
Low level cloud: 0%
Mid level cloud: 61%
High level cloud: 70%
Most Significant Cloud Type: medium
63%
0.0 In
06:00

E
E

1 / 2 mph 81 / 87°F 83% 1010 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 21%
Most Significant Cloud Type: medium
25%
0.0 In
12:00

E
E

3 / 6 mph 101 / 112°F 39% 1009 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 2%
Most Significant Cloud Type: medium
43%
0.0 In
18:00

WSW
WSW

4 / 9 mph 91 / 106°F 68% 1008 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
0.0 In
Mon 06
May
00:00

SSW
SSW

1 / 2 mph 80 / 87°F 89% 1010 mb
Low level cloud: 0%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: medium
40%
0.0 In
06:00

ESE
ESE

0 / 1 mph 79 / 84°F 85% 1012 mb
Low level cloud: 2%
Mid level cloud: 36%
High level cloud: 0%
Most Significant Cloud Type: medium
41%
0.0 In
12:00

ESE
ESE

1 / 2 mph 101 / 114°F 43% 1011 mb
Low level cloud: 0%
Mid level cloud: 55%
High level cloud: 0%
Most Significant Cloud Type: medium
56%
0.0 In
18:00

SW
SW

6 / 12 mph 87 / 97°F 70% 1008 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
0.0 In
Tue 07
May
00:00

WNW
WNW

2 / 4 mph 80 / 88°F 89% 1010 mb
Low level cloud: 1%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
0.0 In
06:00

N
N

1 / 3 mph 80 / 87°F 87% 1010 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
0.1 In
12:00

SE
SE

1 / 2 mph 101 / 116°F 44% 1009 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
49%
0.0 In
18:00

SW
SW

5 / 11 mph 90 / 103°F 69% 1006 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
Wed 08
May
00:00

NNW
NNW

1 / 3 mph 80 / 88°F 90% 1009 mb
Low level cloud: 4%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: medium
57%
0.2 In
06:00

NNE
NNE

1 / 2 mph 80 / 88°F 87% 1010 mb
Low level cloud: 5%
Mid level cloud: 32%
High level cloud: 32%
Most Significant Cloud Type: medium
47%
0.1 In
12:00

SE
SE

2 / 5 mph 100 / 116°F 45% 1009 mb
Low level cloud: 6%
Mid level cloud: 54%
High level cloud: 0%
Most Significant Cloud Type: medium
70%
0.0 In
18:00

SW
SW

5 / 10 mph 91 / 106°F 67% 1008 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
Thu 09
May
00:00

NW
NW

2 / 4 mph 82 / 91°F 89% 1010 mb
Low level cloud: 4%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
41%
0.1 In
06:00

N
N

1 / 2 mph 79 / 85°F 87% 1010 mb
Low level cloud: 13%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
84%
0.2 In
12:00

ESE
ESE

3 / 7 mph 99 / 114°F 47% 1010 mb
Low level cloud: 9%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
67%
0.0 In
18:00

WSW
WSW

6 / 12 mph 90 / 105°F 67% 1007 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
Fri 10
May
00:00

WNW
WNW

2 / 4 mph 80 / 89°F 92% 1011 mb
Low level cloud: 4%
Mid level cloud: 32%
High level cloud: 2%
Most Significant Cloud Type: medium
44%
0.2 In
06:00

NW
NW

1 / 2 mph 81 / 88°F 85% 1010 mb
Low level cloud: 11%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
64%
0.0 In
12:00

ESE
ESE

2 / 5 mph 102 / 118°F 43% 1010 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
0.0 In
18:00

SW
SW

5 / 10 mph 92 / 109°F 67% 1006 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
0.0 In
Sat 11
May
00:00

WNW
WNW

0 / 1 mph 82 / 92°F 87% 1011 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 4%
Most Significant Cloud Type: medium
44%
0.3 In
06:00

WSW
WSW

1 / 2 mph 80 / 87°F 83% 1009 mb
Low level cloud: 13%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
82%
0.1 In
12:00

ESE
ESE

2 / 4 mph 100 / 116°F 47% 1010 mb
Low level cloud: 10%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
72%
0.2 In
18:00

SW
SW

4 / 8 mph 91 / 104°F 63% 1005 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
0.1 In
Sun 12
May
00:00

SSE
SSE

0 / 1 mph 82 / 91°F 87% 1010 mb
Low level cloud: 1%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: medium
48%
0.2 In
06:00

WNW
WNW

1 / 2 mph 81 / 89°F 85% 1009 mb
Low level cloud: 22%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
37%
0.1 In
12:00

ESE
ESE

1 / 2 mph 100 / 119°F 49% 1008 mb
Low level cloud: 16%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.3 In
18:00

WSW
WSW

5 / 10 mph 92 / 109°F 68% 1006 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 1%
Most Significant Cloud Type: medium
19%
0.1 In
Mon 13
May
00:00

S
S

2 / 4 mph 80 / 88°F 90% 1010 mb
Low level cloud: 4%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
55%
0.4 In
06:00

SE
SE

1 / 2 mph 80 / 87°F 85% 1011 mb
Low level cloud: 23%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
39%
0.4 In
12:00

E
E

2 / 4 mph 99 / 115°F 47% 1009 mb
Low level cloud: 9%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
51%
0.2 In
18:00

SW
SW

4 / 9 mph 90 / 105°F 71% 1009 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In

Other Locations Near to San Miguel

Cities and Towns: La Union, El Salvador
Football: CD Aguila, El Salvador

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