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Hambantota 14 Day Long Range Forecast

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

Sri Lanka

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

The forecast for Hambantota in the coming two weeks is predicting the average daytime maximum temperature will be around 34°C, with a high for the two weeks of 35°C expected on the morning of Sunday 6th. The mean minimum temperature will be 25°C, dipping to its lowest on the morning of Sunday 6th at 25°C. The next 14 days will remain predominantly dry. On the whole winds are likely to be fresh.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityCloud AmountPrecip AmountWeather
Wed 02
Jul		04:00

WSW
WSW

 18 / 25 mph 83 / 87°F 71%
Low level cloud: 4%
Mid level cloud: 3%
High level cloud: 12%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 21 / 24 mph 92 / 105°F 62%
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 32%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 23 / 27 mph 94 / 108°F 58%
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 12%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 23 / 27 mph 90 / 100°F 62%
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 9%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 22 / 37 mph 80 / 85°F 74%
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 13%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

 18 / 31 mph 79 / 83°F 81%
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 37%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 16 / 28 mph 78 / 82°F 84%
Low level cloud: 1%
Mid level cloud: 7%
High level cloud: 52%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 03
Jul		01:00

WSW
WSW

 14 / 26 mph 77 / 81°F 83%
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 21%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

 18 / 20 mph 87 / 96°F 70%
Low level cloud: 4%
Mid level cloud: 10%
High level cloud: 20%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 21 / 24 mph 93 / 107°F 64%
Low level cloud: 2%
Mid level cloud: 18%
High level cloud: 33%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 24 / 28 mph 92 / 105°F 65%
Low level cloud: 2%
Mid level cloud: 22%
High level cloud: 94%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 23 / 26 mph 88 / 97°F 69%
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 79%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 18 / 30 mph 79 / 84°F 77%
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 93%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

 15 / 27 mph 78 / 82°F 81%
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 46%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 16 / 27 mph 78 / 82°F 83%
Low level cloud: 1%
Mid level cloud: 11%
High level cloud: 51%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 04
Jul		01:00

WSW
WSW

 16 / 27 mph 78 / 82°F 85%
Low level cloud: 4%
Mid level cloud: 9%
High level cloud: 65%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

 18 / 24 mph 84 / 88°F 71%
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 63%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 21 / 24 mph 91 / 102°F 62%
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 70%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 25 / 28 mph 92 / 102°F 60%
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 22%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 24 / 28 mph 88 / 96°F 64%
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 17%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 21 / 34 mph 80 / 84°F 75%
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 12%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 18 / 30 mph 79 / 83°F 75%
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 41%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 17 / 27 mph 79 / 83°F 78%
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 53%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 05
Jul		01:00

WSW
WSW

 17 / 29 mph 78 / 83°F 80%
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

W
W

 19 / 27 mph 83 / 87°F 70%
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 32%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 20 / 23 mph 92 / 104°F 61%
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 33%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 23 / 26 mph 93 / 106°F 60%
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 20%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 23 / 27 mph 89 / 99°F 65%
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 20%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 19 / 32 mph 80 / 84°F 77%
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 17%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

 17 / 29 mph 79 / 83°F 80%
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 32%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 16 / 28 mph 78 / 82°F 81%
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 32%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 06
Jul		01:00

W
W

 15 / 29 mph 76 / 80°F 83%
Low level cloud: 1%
Mid level cloud: 24%
High level cloud: 15%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

 18 / 26 mph 84 / 88°F 70%
Low level cloud: 1%
Mid level cloud: 32%
High level cloud: 40%
Most Significant Cloud Type: medium
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 20 / 23 mph 94 / 109°F 61%
Low level cloud: 0%
Mid level cloud: 38%
High level cloud: 38%
Most Significant Cloud Type: medium
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 23 / 27 mph 95 / 110°F 60%
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 33%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 23 / 26 mph 91 / 103°F 63%
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 34%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 21 / 37 mph 79 / 84°F 76%
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 33%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 18 / 33 mph 78 / 82°F 80%
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 20%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 16 / 30 mph 77 / 81°F 83%
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 22%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 07
Jul		01:00

W
W

 16 / 28 mph 78 / 82°F 81%
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 17%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

 19 / 26 mph 84 / 88°F 70%
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 16%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 20 / 23 mph 93 / 105°F 61%
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 34%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 23 / 27 mph 94 / 106°F 59%
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 11%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 21 / 25 mph 90 / 98°F 63%
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 17%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 17 / 30 mph 80 / 84°F 76%
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 63%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 13 / 24 mph 79 / 83°F 78%
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 53%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 14 / 26 mph 78 / 82°F 79%
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 97%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 08
Jul		01:00

W
W

 16 / 27 mph 78 / 83°F 81%
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 65%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

 19 / 28 mph 84 / 88°F 69%
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 41%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 19 / 21 mph 93 / 104°F 59%
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 32%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 23 / 26 mph 94 / 107°F 58%
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 19%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 20 / 27 mph 88 / 96°F 66%
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 18%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 14 / 26 mph 79 / 84°F 80%
Low level cloud: 1%
Mid level cloud: 16%
High level cloud: 11%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 15 / 26 mph 78 / 83°F 82%
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 20%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 13 / 23 mph 78 / 82°F 83%
Low level cloud: 1%
Mid level cloud: 30%
High level cloud: 32%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityCloud AmountPrecip AmountWeather
Wed 09
Jul		01:00

W
W

 16 / 27 mph 78 / 82°F 82%
Low level cloud: 1%
Mid level cloud: 9%
High level cloud: 33%
Most Significant Cloud Type: medium
14%
0.0 In
07:00

WSW
WSW

 19 / 24 mph 92 / 105°F 60%
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 32%
Most Significant Cloud Type: medium
17%
0.0 In
13:00

WSW
WSW

 21 / 29 mph 90 / 106°F 70%
Low level cloud: 6%
Mid level cloud: 43%
High level cloud: 37%
Most Significant Cloud Type: medium
62%
0.0 In
19:00

W
W

 15 / 20 mph 85 / 98°F 80%
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 32%
Most Significant Cloud Type: medium
19%
0.0 In
Thu 10
Jul		01:00

W
W

 15 / 28 mph 79 / 83°F 75%
Low level cloud: 0%
Mid level cloud: 35%
High level cloud: 33%
Most Significant Cloud Type: medium
36%
0.0 In
07:00

WSW
WSW

 20 / 30 mph 94 / 108°F 57%
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 9%
Most Significant Cloud Type: medium
21%
0.0 In
13:00

WSW
WSW

 24 / 43 mph 86 / 93°F 66%
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 7%
Most Significant Cloud Type: medium
22%
0.0 In
19:00

W
W

 18 / 27 mph 83 / 91°F 79%
Low level cloud: 1%
Mid level cloud: 24%
High level cloud: 20%
Most Significant Cloud Type: medium
26%
0.0 In
Fri 11
Jul		01:00

W
W

 21 / 38 mph 83 / 90°F 77%
Low level cloud: 5%
Mid level cloud: 44%
High level cloud: 8%
Most Significant Cloud Type: medium
58%
0.0 In
07:00

WSW
WSW

 21 / 32 mph 93 / 108°F 61%
Low level cloud: 1%
Mid level cloud: 31%
High level cloud: 15%
Most Significant Cloud Type: medium
35%
0.0 In
13:00

W
W

 23 / 42 mph 90 / 102°F 66%
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 32%
Most Significant Cloud Type: medium
16%
0.0 In
19:00

WSW
WSW

 18 / 28 mph 83 / 91°F 78%
Low level cloud: 4%
Mid level cloud: 46%
High level cloud: 79%
Most Significant Cloud Type: medium
61%
0.0 In
Sat 12
Jul		01:00

W
W

 21 / 38 mph 83 / 90°F 77%
Low level cloud: 4%
Mid level cloud: 39%
High level cloud: 97%
Most Significant Cloud Type: medium
53%
0.0 In
07:00

WSW
WSW

 26 / 40 mph 92 / 105°F 61%
Low level cloud: 7%
Mid level cloud: 30%
High level cloud: 21%
Most Significant Cloud Type: medium
48%
0.0 In
13:00

W
W

 22 / 41 mph 88 / 100°F 70%
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 32%
Most Significant Cloud Type: medium
19%
0.0 In
19:00

WSW
WSW

 19 / 30 mph 83 / 91°F 79%
Low level cloud: 15%
Mid level cloud: 27%
High level cloud: 40%
Most Significant Cloud Type: low
29%
0.0 In
Sun 13
Jul		01:00

W
W

 22 / 40 mph 82 / 89°F 77%
Low level cloud: 1%
Mid level cloud: 23%
High level cloud: 9%
Most Significant Cloud Type: medium
27%
0.0 In
07:00

W
W

 25 / 39 mph 91 / 102°F 60%
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 14%
Most Significant Cloud Type: medium
32%
0.0 In
13:00

W
W

 26 / 47 mph 88 / 97°F 66%
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 35%
Most Significant Cloud Type: medium
33%
0.0 In
19:00

W
W

 20 / 32 mph 82 / 89°F 78%
Low level cloud: 9%
Mid level cloud: 33%
High level cloud: 32%
Most Significant Cloud Type: medium
60%
0.0 In
Mon 14
Jul		01:00

W
W

 22 / 41 mph 83 / 90°F 77%
Low level cloud: 5%
Mid level cloud: 16%
High level cloud: 12%
Most Significant Cloud Type: medium
29%
0.0 In
07:00

W
W

 24 / 38 mph 91 / 102°F 59%
Low level cloud: 3%
Mid level cloud: 43%
High level cloud: 18%
Most Significant Cloud Type: medium
53%
0.0 In
13:00

W
W

 25 / 46 mph 89 / 102°F 68%
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 6%
Most Significant Cloud Type: medium
22%
0.0 In
19:00

W
W

 22 / 35 mph 82 / 89°F 79%
Low level cloud: 3%
Mid level cloud: 49%
High level cloud: 12%
Most Significant Cloud Type: medium
58%
0.0 In
Tue 15
Jul		01:00

W
W

 23 / 42 mph 83 / 91°F 75%
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 33%
Most Significant Cloud Type: medium
35%
0.0 In
07:00

W
W

 25 / 39 mph 91 / 101°F 60%
Low level cloud: 0%
Mid level cloud: 65%
High level cloud: 32%
Most Significant Cloud Type: medium
66%
0.0 In
13:00

W
W

 22 / 41 mph 90 / 101°F 63%
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 22%
Most Significant Cloud Type: medium
19%
0.0 In
19:00

W
W

 17 / 26 mph 82 / 89°F 81%
Low level cloud: 18%
Mid level cloud: 21%
High level cloud: 33%
Most Significant Cloud Type: low
29%
0.0 In
Wed 16
Jul		01:00

W
W

 21 / 39 mph 84 / 91°F 71%
Low level cloud: 2%
Mid level cloud: 45%
High level cloud: 16%
Most Significant Cloud Type: medium
51%
0.0 In
07:00

W
W

 23 / 37 mph 91 / 102°F 58%
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 20%
Most Significant Cloud Type: medium
14%
0.0 In
13:00

W
W

 23 / 43 mph 90 / 102°F 63%
Low level cloud: 0%
Mid level cloud: 42%
High level cloud: 12%
Most Significant Cloud Type: medium
42%
0.0 In
19:00

W
W

 19 / 30 mph 82 / 90°F 78%
Low level cloud: 4%
Mid level cloud: 25%
High level cloud: 48%
Most Significant Cloud Type: medium
37%
0.0 In
Thu 17
Jul		01:00

W
W

 22 / 41 mph 83 / 89°F 74%
Low level cloud: 1%
Mid level cloud: 25%
High level cloud: 20%
Most Significant Cloud Type: medium
28%
0.0 In
07:00

W
W

 22 / 40 mph 80 / 84°F 67%
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 48%
Most Significant Cloud Type: medium
46%
0.0 In
13:00

W
W

 23 / 43 mph 87 / 98°F 70%
Low level cloud: 0%
Mid level cloud: 57%
High level cloud: 32%
Most Significant Cloud Type: medium
58%
0.0 In
19:00

W
W

 20 / 33 mph 85 / 95°F 78%
Low level cloud: 5%
Mid level cloud: 43%
High level cloud: 39%
Most Significant Cloud Type: medium
59%
0.0 In

Other Locations Near to Hambantota

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.
(More Info)

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