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Juazeiro 14 Day Long Range Forecast

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

Brazil

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

Over the next 14 days the Juazeiro forecast suggests 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 Saturday 4th. The mean minimum temperature will be 22°C, dipping to its lowest on the morning of Saturday 4th at 20°C. Expect the following 14 days ahead to remain predominantly dry. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 28
Apr
15:00

ESE
ESE

15 / 17 mph 92 / 90°F 29% 1009 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

11 / 18 mph 85 / 85°F 37% 1010 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

10 / 17 mph 80 / 80°F 47% 1012 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
Mon 29
Apr
00:00

SE
SE

15 / 23 mph 76 / 78°F 60% 1013 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
03:00

SE
SE

15 / 22 mph 73 / 77°F 73% 1012 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
06:00

SE
SE

11 / 15 mph 73 / 76°F 80% 1013 mb
Low level cloud: 2%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

17 / 20 mph 82 / 83°F 54% 1015 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

15 / 17 mph 92 / 93°F 41% 1012 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

SE
SE

17 / 20 mph 89 / 91°F 45% 1010 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
18:00

SSE
SSE

16 / 24 mph 83 / 85°F 55% 1011 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

SE
SE

17 / 26 mph 78 / 81°F 69% 1014 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
Tue 30
Apr
00:00

SE
SE

17 / 24 mph 76 / 79°F 76% 1014 mb
Low level cloud: 1%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

17 / 25 mph 73 / 77°F 87% 1012 mb
Low level cloud: 32%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

13 / 18 mph 73 / 76°F 90% 1014 mb
Low level cloud: 72%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

17 / 19 mph 82 / 83°F 65% 1015 mb
Low level cloud: 46%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

18 / 21 mph 88 / 90°F 47% 1012 mb
Low level cloud: 7%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

15 / 18 mph 92 / 93°F 39% 1009 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

16 / 26 mph 87 / 87°F 39% 1010 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

20 / 26 mph 81 / 84°F 62% 1013 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
Wed 01
May
00:00

SE
SE

20 / 27 mph 76 / 79°F 77% 1013 mb
Low level cloud: 7%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

18 / 26 mph 73 / 77°F 86% 1012 mb
Low level cloud: 25%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

13 / 17 mph 72 / 76°F 89% 1013 mb
Low level cloud: 98%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

17 / 20 mph 82 / 85°F 60% 1014 mb
Low level cloud: 94%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

16 / 19 mph 91 / 92°F 43% 1011 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

18 / 21 mph 91 / 92°F 43% 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
18:00

SSE
SSE

19 / 28 mph 82 / 85°F 60% 1010 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
21:00

SE
SE

19 / 27 mph 77 / 80°F 74% 1012 mb
Low level cloud: 1%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 02
May
00:00

SE
SE

19 / 27 mph 74 / 78°F 85% 1012 mb
Low level cloud: 19%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

16 / 22 mph 72 / 76°F 87% 1011 mb
Low level cloud: 73%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

14 / 19 mph 74 / 77°F 85% 1012 mb
Low level cloud: 82%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

17 / 20 mph 80 / 83°F 66% 1013 mb
Low level cloud: 90%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

15 / 17 mph 86 / 88°F 54% 1011 mb
Low level cloud: 40%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

18 / 21 mph 93 / 96°F 39% 1007 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
18:00

SSE
SSE

19 / 27 mph 82 / 86°F 60% 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

SE
SE

20 / 29 mph 76 / 80°F 79% 1011 mb
Low level cloud: 2%
Mid level cloud: 18%
High level cloud: 2%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 03
May
00:00

SE
SE

19 / 27 mph 73 / 77°F 89% 1011 mb
Low level cloud: 40%
Mid level cloud: 12%
High level cloud: 22%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

17 / 22 mph 75 / 78°F 81% 1010 mb
Low level cloud: 100%
Mid level cloud: 18%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

14 / 18 mph 75 / 78°F 83% 1011 mb
Low level cloud: 99%
Mid level cloud: 28%
High level cloud: 6%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

17 / 20 mph 77 / 80°F 76% 1013 mb
Low level cloud: 87%
Mid level cloud: 91%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

15 / 17 mph 82 / 84°F 63% 1012 mb
Low level cloud: 71%
Mid level cloud: 53%
High level cloud: 1%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

15 / 17 mph 90 / 92°F 45% 1008 mb
Low level cloud: 0%
Mid level cloud: 81%
High level cloud: 0%
Most Significant Cloud Type: medium
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

13 / 20 mph 84 / 86°F 53% 1009 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

14 / 19 mph 82 / 84°F 55% 1011 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 04
May
00:00

ESE
ESE

13 / 20 mph 75 / 78°F 64% 1012 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
03:00

SE
SE

12 / 19 mph 70 / 70°F 80% 1012 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 2%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

12 / 19 mph 70 / 68°F 90% 1013 mb
Low level cloud: 36%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

18 / 21 mph 83 / 84°F 59% 1015 mb
Low level cloud: 74%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

18 / 21 mph 93 / 92°F 34% 1012 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
15:00

SE
SE

19 / 21 mph 95 / 93°F 22% 1009 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

18 / 31 mph 85 / 84°F 37% 1010 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

17 / 28 mph 79 / 80°F 51% 1013 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 4%
Most Significant Cloud Type: medium
15%
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
03:00

SE
SE

16 / 23 mph 72 / 76°F 90% 1013 mb
Low level cloud: 50%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
54%
0.0 In
09:00

ESE
ESE

19 / 26 mph 80 / 83°F 67% 1015 mb
Low level cloud: 62%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
66%
0.0 In
15:00

SE
SE

20 / 24 mph 89 / 91°F 40% 1011 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
0.0 In
21:00

SE
SE

22 / 28 mph 80 / 83°F 66% 1014 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 3%
Most Significant Cloud Type: medium
25%
0.0 In
Mon 06
May
03:00

SE
SE

17 / 23 mph 72 / 76°F 85% 1013 mb
Low level cloud: 44%
Mid level cloud: 46%
High level cloud: 10%
Most Significant Cloud Type: low
60%
0.0 In
09:00

SE
SE

22 / 28 mph 79 / 82°F 66% 1015 mb
Low level cloud: 65%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
70%
0.0 In
15:00

SE
SE

19 / 24 mph 95 / 92°F 24% 1008 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 2%
Most Significant Cloud Type: medium
8%
0.0 In
21:00

SE
SE

19 / 26 mph 80 / 83°F 60% 1013 mb
Low level cloud: 2%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
35%
0.0 In
Tue 07
May
03:00

SE
SE

15 / 22 mph 73 / 77°F 81% 1011 mb
Low level cloud: 43%
Mid level cloud: 21%
High level cloud: 2%
Most Significant Cloud Type: low
50%
0.0 In
09:00

ESE
ESE

19 / 25 mph 81 / 83°F 62% 1014 mb
Low level cloud: 26%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
29%
0.0 In
15:00

ESE
ESE

16 / 21 mph 89 / 90°F 41% 1009 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
0.0 In
21:00

SE
SE

15 / 23 mph 78 / 81°F 67% 1013 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
Wed 08
May
03:00

SE
SE

16 / 23 mph 72 / 76°F 78% 1012 mb
Low level cloud: 10%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
54%
0.0 In
09:00

SE
SE

17 / 22 mph 78 / 81°F 68% 1015 mb
Low level cloud: 71%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
74%
0.0 In
15:00

SE
SE

17 / 22 mph 86 / 89°F 51% 1010 mb
Low level cloud: 19%
Mid level cloud: 64%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
21:00

SE
SE

16 / 25 mph 79 / 81°F 65% 1013 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
Thu 09
May
03:00

SE
SE

15 / 22 mph 71 / 71°F 85% 1014 mb
Low level cloud: 18%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.0 In
09:00

ESE
ESE

18 / 23 mph 81 / 83°F 62% 1015 mb
Low level cloud: 56%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
58%
0.0 In
15:00

SE
SE

14 / 21 mph 94 / 92°F 26% 1009 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
21:00

SE
SE

16 / 25 mph 80 / 82°F 56% 1012 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
03:00

SE
SE

15 / 22 mph 69 / 69°F 89% 1013 mb
Low level cloud: 45%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
47%
0.0 In
09:00

SE
SE

16 / 21 mph 78 / 81°F 68% 1015 mb
Low level cloud: 65%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
66%
0.0 In
15:00

ESE
ESE

12 / 18 mph 93 / 95°F 35% 1008 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
0.0 In
21:00

SE
SE

12 / 18 mph 79 / 81°F 64% 1012 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
Sat 11
May
03:00

SE
SE

11 / 15 mph 72 / 76°F 75% 1011 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
09:00

SE
SE

17 / 22 mph 82 / 85°F 60% 1014 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
15:00

ESE
ESE

13 / 19 mph 94 / 93°F 26% 1007 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
21:00

SE
SE

19 / 29 mph 81 / 83°F 58% 1012 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
Sun 12
May
03:00

SE
SE

12 / 17 mph 73 / 77°F 87% 1011 mb
Low level cloud: 46%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
50%
0.0 In
09:00

ESE
ESE

17 / 22 mph 81 / 83°F 58% 1015 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
4%
0.0 In
15:00

SE
SE

17 / 25 mph 95 / 95°F 30% 1008 mb
Low level cloud: 0%
Mid level cloud: 38%
High level cloud: 0%
Most Significant Cloud Type: medium
38%
0.0 In
21:00

SE
SE

20 / 28 mph 80 / 82°F 52% 1012 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
Mon 13
May
03:00

SE
SE

14 / 21 mph 71 / 71°F 85% 1012 mb
Low level cloud: 15%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.0 In
09:00

SE
SE

20 / 26 mph 81 / 83°F 57% 1015 mb
Low level cloud: 2%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
15:00

SE
SE

14 / 20 mph 92 / 91°F 27% 1009 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
21:00

SE
SE

18 / 27 mph 80 / 82°F 63% 1012 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 3%
Most Significant Cloud Type: medium
13%
0.0 In

Other Locations Near to Juazeiro

Cities and Towns: Petrolina, Brazil

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