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La Union 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for La Union

El Salvador

Long range weather outlook for La Union includes 14 day forecast summary:

Reviewing the forecast for La Union Over the next 14 days and the average daytime maximum temperature will be around 34°C, with a high for the two weeks of 36°C expected on the afternoon of Thursday 9th. The mean minimum temperature will be 26°C, dipping to its lowest on the morning of Friday 10th at 25°C. Expect the following 14 days ahead to have some days seeing a little precipitation and some days with rain. The indicators are that Thursday 2nd will have the most precipitation with an accumulation of around 9.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 01
May
15:00

SSW
SSW

9 / 10 mph 95 / 104°F 53% 1005 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
18:00

SW
SW

6 / 8 mph 90 / 98°F 65% 1006 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

4 / 5 mph 85 / 93°F 74% 1008 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 02
May
00:00

WSW
WSW

3 / 4 mph 82 / 90°F 81% 1008 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

2 / 4 mph 80 / 87°F 85% 1006 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

S
S

2 / 5 mph 83 / 84°F 81% 1008 mb
Low level cloud: 7%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
65%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
09:00

S
S

4 / 6 mph 88 / 94°F 68% 1010 mb
Low level cloud: 12%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
78%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

S
S

6 / 7 mph 93 / 100°F 56% 1009 mb
Low level cloud: 26%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

9 / 10 mph 92 / 99°F 58% 1007 mb
Low level cloud: 26%
Mid level cloud: 26%
High level cloud: 6%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

6 / 7 mph 88 / 93°F 69% 1007 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 8%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

3 / 4 mph 82 / 89°F 78% 1009 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 03
May
00:00

NW
NW

3 / 4 mph 81 / 86°F 80% 1008 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 11%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

2 / 3 mph 79 / 84°F 82% 1007 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 46%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

2 / 2 mph 82 / 83°F 82% 1008 mb
Low level cloud: 1%
Mid level cloud: 15%
High level cloud: 33%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

4 / 4 mph 92 / 99°F 61% 1010 mb
Low level cloud: 14%
Mid level cloud: 14%
High level cloud: 3%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

4 / 5 mph 95 / 104°F 54% 1008 mb
Low level cloud: 13%
Mid level cloud: 29%
High level cloud: 10%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

10 / 12 mph 93 / 102°F 56% 1005 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 2%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

8 / 9 mph 88 / 96°F 72% 1006 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 16%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

3 / 4 mph 83 / 92°F 83% 1009 mb
Low level cloud: 8%
Mid level cloud: 17%
High level cloud: 95%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 04
May
00:00

WNW
WNW

2 / 3 mph 82 / 90°F 87% 1008 mb
Low level cloud: 16%
Mid level cloud: 19%
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

NW
NW

2 / 3 mph 80 / 87°F 88% 1007 mb
Low level cloud: 18%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

1 / 2 mph 83 / 86°F 87% 1009 mb
Low level cloud: 13%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

3 / 4 mph 92 / 100°F 62% 1010 mb
Low level cloud: 17%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

6 / 7 mph 94 / 101°F 53% 1009 mb
Low level cloud: 20%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

9 / 11 mph 94 / 101°F 54% 1006 mb
Low level cloud: 2%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

7 / 8 mph 88 / 95°F 69% 1008 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
21:00

WSW
WSW

2 / 3 mph 84 / 92°F 77% 1010 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 1%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 05
May
00:00

W
W

2 / 4 mph 82 / 89°F 79% 1009 mb
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 0%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

0 / 1 mph 80 / 85°F 82% 1008 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
06:00

NNE
NNE

0 / 1 mph 84 / 85°F 79% 1010 mb
Low level cloud: 5%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

4 / 5 mph 92 / 99°F 57% 1011 mb
Low level cloud: 20%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

7 / 8 mph 94 / 101°F 54% 1010 mb
Low level cloud: 21%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

10 / 12 mph 94 / 102°F 54% 1007 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

7 / 9 mph 88 / 95°F 66% 1008 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

4 / 5 mph 82 / 90°F 79% 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 06
May
00:00

W
W

2 / 3 mph 81 / 87°F 80% 1010 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

1 / 2 mph 80 / 86°F 83% 1009 mb
Low level cloud: 0%
Mid level cloud: 35%
High level cloud: 0%
Most Significant Cloud Type: medium
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

2 / 3 mph 81 / 85°F 78% 1010 mb
Low level cloud: 16%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
90%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
09:00

SSE
SSE

4 / 4 mph 92 / 98°F 59% 1012 mb
Low level cloud: 46%
Mid level cloud: 42%
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

S
S

5 / 6 mph 95 / 102°F 52% 1010 mb
Low level cloud: 25%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

10 / 11 mph 91 / 98°F 60% 1008 mb
Low level cloud: 8%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

7 / 9 mph 88 / 95°F 68% 1007 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

5 / 6 mph 83 / 90°F 77% 1010 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
Tue 07
May
00:00

WNW
WNW

3 / 4 mph 82 / 88°F 78% 1009 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

2 / 3 mph 80 / 86°F 82% 1008 mb
Low level cloud: 1%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

2 / 2 mph 83 / 85°F 81% 1010 mb
Low level cloud: 0%
Mid level cloud: 30%
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 93 / 99°F 57% 1011 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

6 / 8 mph 94 / 101°F 53% 1009 mb
Low level cloud: 11%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

9 / 10 mph 93 / 100°F 56% 1007 mb
Low level cloud: 12%
Mid level cloud: 32%
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

SSW
SSW

6 / 8 mph 89 / 93°F 68% 1008 mb
Low level cloud: 3%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

4 / 5 mph 83 / 91°F 78% 1010 mb
Low level cloud: 8%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 08
May
00:00

WNW
WNW

2 / 5 mph 82 / 90°F 81% 1009 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 3%
Most Significant Cloud Type: medium
31%
0.0 In
06:00

NW
NW

2 / 4 mph 80 / 87°F 85% 1009 mb
Low level cloud: 2%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
0.0 In
12:00

S
S

5 / 11 mph 99 / 118°F 54% 1009 mb
Low level cloud: 10%
Mid level cloud: 18%
High level cloud: 1%
Most Significant Cloud Type: low
16%
0.0 In
18:00

SSW
SSW

8 / 16 mph 84 / 91°F 71% 1008 mb
Low level cloud: 1%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.0 In
Thu 09
May
00:00

WNW
WNW

2 / 4 mph 86 / 100°F 84% 1011 mb
Low level cloud: 13%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
06:00

NNE
NNE

1 / 1 mph 81 / 89°F 88% 1011 mb
Low level cloud: 29%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.0 In
12:00

SSE
SSE

6 / 12 mph 95 / 111°F 55% 1010 mb
Low level cloud: 13%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
22%
0.0 In
18:00

SW
SW

7 / 15 mph 85 / 91°F 66% 1007 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
Fri 10
May
00:00

NW
NW

2 / 5 mph 84 / 95°F 84% 1010 mb
Low level cloud: 14%
Mid level cloud: 34%
High level cloud: 0%
Most Significant Cloud Type: low
25%
0.0 In
06:00

NNE
NNE

1 / 2 mph 81 / 87°F 84% 1010 mb
Low level cloud: 9%
Mid level cloud: 30%
High level cloud: 4%
Most Significant Cloud Type: medium
54%
0.1 In
12:00

SSE
SSE

5 / 10 mph 98 / 118°F 53% 1009 mb
Low level cloud: 11%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
20%
0.0 In
18:00

SSW
SSW

7 / 15 mph 88 / 98°F 68% 1007 mb
Low level cloud: 1%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.0 In
Sat 11
May
00:00

NW
NW

2 / 4 mph 86 / 101°F 84% 1010 mb
Low level cloud: 14%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
22%
0.0 In
06:00

NNW
NNW

2 / 4 mph 79 / 85°F 85% 1009 mb
Low level cloud: 9%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: medium
71%
0.1 In
12:00

SSE
SSE

5 / 11 mph 96 / 111°F 55% 1008 mb
Low level cloud: 11%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
60%
0.0 In
18:00

SW
SW

7 / 15 mph 89 / 101°F 66% 1006 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
Sun 12
May
00:00

WSW
WSW

3 / 6 mph 84 / 96°F 85% 1009 mb
Low level cloud: 7%
Mid level cloud: 44%
High level cloud: 8%
Most Significant Cloud Type: medium
62%
0.2 In
06:00

N
N

2 / 4 mph 80 / 86°F 86% 1009 mb
Low level cloud: 5%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
41%
0.1 In
12:00

S
S

6 / 12 mph 94 / 110°F 59% 1009 mb
Low level cloud: 32%
Mid level cloud: 25%
High level cloud: 6%
Most Significant Cloud Type: low
41%
0.1 In
18:00

SW
SW

6 / 13 mph 89 / 102°F 67% 1007 mb
Low level cloud: 4%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
Mon 13
May
00:00

SW
SW

2 / 5 mph 85 / 101°F 89% 1009 mb
Low level cloud: 13%
Mid level cloud: 31%
High level cloud: 5%
Most Significant Cloud Type: low
24%
0.1 In
06:00

N
N

2 / 4 mph 79 / 85°F 89% 1010 mb
Low level cloud: 4%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
37%
0.3 In
12:00

SSE
SSE

4 / 10 mph 96 / 115°F 57% 1010 mb
Low level cloud: 37%
Mid level cloud: 32%
High level cloud: 7%
Most Significant Cloud Type: low
48%
0.1 In
18:00

SW
SW

7 / 14 mph 89 / 100°F 66% 1007 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
Tue 14
May
00:00

WNW
WNW

3 / 6 mph 81 / 90°F 89% 1011 mb
Low level cloud: 9%
Mid level cloud: 30%
High level cloud: 7%
Most Significant Cloud Type: medium
55%
0.1 In
06:00

N
N

2 / 4 mph 80 / 87°F 87% 1010 mb
Low level cloud: 24%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.2 In
12:00

SSE
SSE

4 / 10 mph 96 / 111°F 53% 1010 mb
Low level cloud: 14%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
82%
0.1 In
18:00

SSW
SSW

6 / 13 mph 88 / 100°F 67% 1007 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
0.0 In
Wed 15
May
00:00

W
W

3 / 7 mph 82 / 91°F 84% 1011 mb
Low level cloud: 5%
Mid level cloud: 28%
High level cloud: 8%
Most Significant Cloud Type: medium
41%
0.1 In
06:00

N
N

2 / 4 mph 79 / 85°F 88% 1010 mb
Low level cloud: 27%
Mid level cloud: 32%
High level cloud: 1%
Most Significant Cloud Type: low
38%
0.2 In
12:00

SE
SE

3 / 7 mph 99 / 114°F 48% 1010 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 2%
Most Significant Cloud Type: medium
29%
0.0 In
18:00

SSW
SSW

6 / 13 mph 88 / 100°F 70% 1007 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
Thu 16
May
00:00

W
W

3 / 6 mph 86 / 97°F 78% 1012 mb
Low level cloud: 1%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
0.0 In
06:00

NW
NW

2 / 5 mph 78 / 83°F 89% 1010 mb
Low level cloud: 40%
Mid level cloud: 36%
High level cloud: 22%
Most Significant Cloud Type: low
55%
0.3 In
12:00

SE
SE

4 / 9 mph 99 / 111°F 43% 1010 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 11%
Most Significant Cloud Type: medium
5%
0.0 In
18:00

SSW
SSW

6 / 13 mph 85 / 93°F 74% 1007 mb
Low level cloud: 9%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
14%
0.0 In

Other Locations Near to La Union

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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