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Songjiang 14 Day Long Range Forecast

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

China

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

The outlook for Songjiang in the two weeks ahead shows the average daytime maximum temperature will be around 23°C, with a high for the two weeks of 29°C expected on the afternoon of Saturday 11th. The average minimum temperature will be 15°C, dipping to its lowest on the morning of Thursday 2nd at 13°C. The next 14 days will have some days seeing a little precipitation and some days with rain. The current forecast indicates Sunday 12th will have the most precipitation with an accumulation of around 17.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 02
May
17:00

ESE
ESE

10 / 12 mph 69 / 68°F 62% 1017 mb
Low level cloud: 88%
Mid level cloud: 13%
High level cloud: 3%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

ESE
ESE

8 / 9 mph 63 / 63°F 79% 1019 mb
Low level cloud: 1%
Mid level cloud: 11%
High level cloud: 13%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

E
E

6 / 8 mph 60 / 60°F 88% 1019 mb
Low level cloud: 10%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 03
May
02:00

E
E

6 / 9 mph 58 / 57°F 91% 1018 mb
Low level cloud: 21%
Mid level cloud: 13%
High level cloud: 4%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

E
E

6 / 11 mph 56 / 55°F 93% 1018 mb
Low level cloud: 19%
Mid level cloud: 12%
High level cloud: 89%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

E
E

11 / 13 mph 65 / 63°F 68% 1019 mb
Low level cloud: 5%
Mid level cloud: 24%
High level cloud: 7%
Most Significant Cloud Type: medium
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

ESE
ESE

12 / 14 mph 70 / 69°F 49% 1019 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 3%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

ESE
ESE

13 / 14 mph 71 / 69°F 45% 1017 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 69%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

ESE
ESE

11 / 12 mph 69 / 67°F 56% 1016 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 3%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

ESE
ESE

7 / 10 mph 62 / 62°F 77% 1017 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 37%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

E
E

7 / 10 mph 59 / 59°F 84% 1017 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 92%
Most Significant Cloud Type: medium
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 04
May
02:00

E
E

7 / 11 mph 58 / 57°F 84% 1015 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 100%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

E
E

7 / 12 mph 58 / 56°F 78% 1015 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

ESE
ESE

11 / 14 mph 65 / 63°F 64% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 16%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

SE
SE

11 / 14 mph 65 / 63°F 67% 1014 mb
Low level cloud: 0%
Mid level cloud: 35%
High level cloud: 10%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

SE
SE

10 / 14 mph 65 / 63°F 69% 1012 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 21%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

SE
SE

10 / 13 mph 64 / 63°F 76% 1012 mb
Low level cloud: 1%
Mid level cloud: 80%
High level cloud: 32%
Most Significant Cloud Type: medium
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

SE
SE

8 / 11 mph 61 / 62°F 88% 1012 mb
Low level cloud: 56%
Mid level cloud: 77%
High level cloud: 67%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

SE
SE

9 / 13 mph 60 / 60°F 95% 1011 mb
Low level cloud: 65%
Mid level cloud: 53%
High level cloud: 100%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 05
May
02:00

SSE
SSE

5 / 8 mph 60 / 60°F 96% 1009 mb
Low level cloud: 60%
Mid level cloud: 56%
High level cloud: 100%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

S
S

3 / 5 mph 60 / 60°F 97% 1008 mb
Low level cloud: 98%
Mid level cloud: 90%
High level cloud: 94%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
08:00

WSW
WSW

3 / 4 mph 60 / 60°F 97% 1008 mb
Low level cloud: 100%
Mid level cloud: 99%
High level cloud: 86%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
11:00

WNW
WNW

3 / 5 mph 62 / 61°F 98% 1008 mb
Low level cloud: 100%
Mid level cloud: 95%
High level cloud: 90%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
14:00

WNW
WNW

8 / 12 mph 63 / 62°F 98% 1008 mb
Low level cloud: 91%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
17:00

WNW
WNW

9 / 11 mph 63 / 62°F 96% 1009 mb
Low level cloud: 78%
Mid level cloud: 92%
High level cloud: 18%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
20:00

WNW
WNW

6 / 8 mph 62 / 62°F 95% 1010 mb
Low level cloud: 57%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

WNW
WNW

6 / 8 mph 61 / 61°F 96% 1011 mb
Low level cloud: 62%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 06
May
02:00

WNW
WNW

6 / 9 mph 60 / 60°F 94% 1012 mb
Low level cloud: 38%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

WNW
WNW

3 / 6 mph 59 / 59°F 96% 1012 mb
Low level cloud: 27%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

WSW
WSW

5 / 7 mph 67 / 65°F 82% 1013 mb
Low level cloud: 7%
Mid level cloud: 4%
High level cloud: 20%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

W
W

6 / 7 mph 76 / 77°F 61% 1014 mb
Low level cloud: 4%
Mid level cloud: 3%
High level cloud: 17%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

WSW
WSW

6 / 6 mph 81 / 80°F 52% 1011 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 15%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

SSW
SSW

5 / 5 mph 81 / 80°F 62% 1011 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 100%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

SSE
SSE

7 / 8 mph 71 / 71°F 81% 1012 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 99%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

SE
SE

7 / 10 mph 66 / 66°F 86% 1013 mb
Low level cloud: 3%
Mid level cloud: 48%
High level cloud: 18%
Most Significant Cloud Type: medium
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 07
May
02:00

SSE
SSE

5 / 8 mph 64 / 64°F 91% 1013 mb
Low level cloud: 20%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

SSE
SSE

5 / 10 mph 64 / 64°F 93% 1013 mb
Low level cloud: 0%
Mid level cloud: 66%
High level cloud: 71%
Most Significant Cloud Type: medium
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

SSE
SSE

6 / 11 mph 66 / 65°F 88% 1013 mb
Low level cloud: 0%
Mid level cloud: 76%
High level cloud: 32%
Most Significant Cloud Type: medium
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

SE
SE

6 / 8 mph 65 / 65°F 86% 1014 mb
Low level cloud: 14%
Mid level cloud: 53%
High level cloud: 76%
Most Significant Cloud Type: medium
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

SSE
SSE

7 / 8 mph 74 / 76°F 71% 1013 mb
Low level cloud: 39%
Mid level cloud: 20%
High level cloud: 12%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

SSE
SSE

8 / 9 mph 72 / 69°F 77% 1013 mb
Low level cloud: 62%
Mid level cloud: 13%
High level cloud: 8%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

SSE
SSE

6 / 8 mph 64 / 64°F 92% 1014 mb
Low level cloud: 24%
Mid level cloud: 19%
High level cloud: 12%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

SE
SE

2 / 3 mph 62 / 62°F 92% 1015 mb
Low level cloud: 47%
Mid level cloud: 5%
High level cloud: 6%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 08
May
02:00

S
S

2 / 4 mph 61 / 61°F 93% 1014 mb
Low level cloud: 56%
Mid level cloud: 4%
High level cloud: 16%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

NNW
NNW

2 / 4 mph 60 / 60°F 93% 1015 mb
Low level cloud: 96%
Mid level cloud: 3%
High level cloud: 91%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

N
N

4 / 5 mph 68 / 65°F 85% 1016 mb
Low level cloud: 70%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

N
N

9 / 10 mph 77 / 76°F 44% 1016 mb
Low level cloud: 2%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

NW
NW

11 / 13 mph 79 / 77°F 38% 1014 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

NNW
NNW

9 / 11 mph 78 / 77°F 43% 1013 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
20:00

NNE
NNE

6 / 8 mph 66 / 66°F 66% 1016 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

N
N

3 / 5 mph 63 / 63°F 67% 1016 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 14%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 09
May
02:00

NNW
NNW

1 / 2 mph 65 / 65°F 93% 1015 mb
Low level cloud: 28%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
38%
0.0 In
08:00

NW
NW

10 / 19 mph 62 / 62°F 77% 1013 mb
Low level cloud: 60%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
67%
0.0 In
14:00

S
S

3 / 4 mph 85 / 85°F 42% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
20:00

NE
NE

6 / 9 mph 77 / 79°F 67% 1016 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
Fri 10
May
02:00

ESE
ESE

4 / 8 mph 67 / 67°F 91% 1014 mb
Low level cloud: 10%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
10%
0.0 In
08:00

WSW
WSW

1 / 2 mph 72 / 76°F 72% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 20%
Most Significant Cloud Type: high
20%
0.0 In
14:00

SSE
SSE

6 / 11 mph 82 / 83°F 46% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
20:00

SE
SE

11 / 15 mph 68 / 68°F 83% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sat 11
May
02:00

SE
SE

8 / 14 mph 62 / 62°F 86% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 98%
Most Significant Cloud Type: high
97%
0.0 In
08:00

SSE
SSE

11 / 14 mph 72 / 76°F 70% 1012 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 16%
Most Significant Cloud Type: medium
24%
0.0 In
14:00

SSE
SSE

9 / 17 mph 83 / 85°F 54% 1012 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
20:00

SE
SE

10 / 13 mph 74 / 78°F 75% 1010 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: medium
47%
0.0 In
Sun 12
May
02:00

SE
SE

6 / 10 mph 74 / 78°F 91% 1011 mb
Low level cloud: 3%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
0.0 In
08:00

SE
SE

9 / 13 mph 70 / 70°F 94% 1009 mb
Low level cloud: 58%
Mid level cloud: 67%
High level cloud: 94%
Most Significant Cloud Type: low
93%
0.7 In
14:00

SSE
SSE

11 / 19 mph 82 / 85°F 61% 1011 mb
Low level cloud: 55%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
63%
0.0 In
20:00

SSE
SSE

6 / 12 mph 71 / 71°F 98% 1008 mb
Low level cloud: 89%
Mid level cloud: 53%
High level cloud: 88%
Most Significant Cloud Type: low
100%
0.4 In
Mon 13
May
02:00

SE
SE

12 / 21 mph 69 / 69°F 94% 1010 mb
Low level cloud: 69%
Mid level cloud: 21%
High level cloud: 10%
Most Significant Cloud Type: low
77%
0.0 In
08:00

N
N

9 / 18 mph 72 / 76°F 89% 1011 mb
Low level cloud: 44%
Mid level cloud: 5%
High level cloud: 14%
Most Significant Cloud Type: low
47%
0.0 In
14:00

SSE
SSE

17 / 30 mph 72 / 72°F 89% 1009 mb
Low level cloud: 98%
Mid level cloud: 51%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
20:00

ENE
ENE

6 / 12 mph 76 / 78°F 60% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 21%
Most Significant Cloud Type: high
21%
0.0 In
Tue 14
May
02:00

SE
SE

14 / 26 mph 69 / 69°F 97% 1006 mb
Low level cloud: 94%
Mid level cloud: 44%
High level cloud: 34%
Most Significant Cloud Type: low
100%
0.4 In
08:00

ESE
ESE

8 / 16 mph 73 / 77°F 52% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
14:00

W
W

6 / 12 mph 86 / 93°F 64% 1003 mb
Low level cloud: 71%
Mid level cloud: 28%
High level cloud: 18%
Most Significant Cloud Type: low
83%
0.0 In
20:00

ESE
ESE

11 / 20 mph 71 / 71°F 61% 1009 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Wed 15
May
02:00

SSE
SSE

2 / 5 mph 77 / 82°F 95% 1004 mb
Low level cloud: 33%
Mid level cloud: 37%
High level cloud: 0%
Most Significant Cloud Type: low
46%
0.0 In
08:00

ESE
ESE

1 / 3 mph 80 / 85°F 80% 1008 mb
Low level cloud: 14%
Mid level cloud: 14%
High level cloud: 15%
Most Significant Cloud Type: low
20%
0.0 In
14:00

NNW
NNW

4 / 9 mph 87 / 95°F 66% 1005 mb
Low level cloud: 84%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
94%
0.0 In
20:00

E
E

3 / 6 mph 76 / 81°F 85% 1008 mb
Low level cloud: 39%
Mid level cloud: 42%
High level cloud: 52%
Most Significant Cloud Type: low
60%
0.0 In
Thu 16
May
02:00

E
E

3 / 6 mph 78 / 83°F 90% 1007 mb
Low level cloud: 42%
Mid level cloud: 60%
High level cloud: 0%
Most Significant Cloud Type: low
62%
0.0 In
08:00

SE
SE

4 / 8 mph 75 / 79°F 86% 1008 mb
Low level cloud: 56%
Mid level cloud: 0%
High level cloud: 12%
Most Significant Cloud Type: low
57%
0.0 In
14:00

ENE
ENE

5 / 11 mph 81 / 86°F 70% 1008 mb
Low level cloud: 86%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
20:00

SE
SE

7 / 14 mph 76 / 80°F 88% 1008 mb
Low level cloud: 14%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
13%
0.0 In
Fri 17
May
02:00

E
E

5 / 11 mph 72 / 76°F 90% 1009 mb
Low level cloud: 48%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
64%
0.0 In
08:00

SE
SE

9 / 18 mph 76 / 80°F 78% 1006 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
4%
0.0 In
14:00

SE
SE

9 / 18 mph 82 / 86°F 69% 1008 mb
Low level cloud: 91%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
20:00

ESE
ESE

8 / 16 mph 77 / 82°F 88% 1004 mb
Low level cloud: 12%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
12%
0.0 In

Other Locations Near to Songjiang

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