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Antioch 14 Day Long Range Forecast

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

California, United States Of America

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

Reviewing the forecast for Antioch Over the next 14 days and the average daytime maximum temperature will be around 16°C, with a high for the two weeks of 20°C expected on the afternoon of Thursday 18th. The average minimum temperature will be 12°C, dipping to its lowest on the morning of Thursday 18th at 10°C. The next 14 days will have some days seeing a little precipitation and some days with rain. Predictions are Tuesday 23rd will have the most precipitation with an accumulation of around 22.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 17
Dec
01:00

SE
SE

5 / 10 mph 48 / 46°F 79% 1022 mb
Low level cloud: 65%
Mid level cloud: 8%
High level cloud: 2%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

5 / 11 mph 54 / 53°F 85% 1021 mb
Low level cloud: 88%
Mid level cloud: 55%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

6 / 12 mph 54 / 53°F 91% 1021 mb
Low level cloud: 98%
Mid level cloud: 91%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

4 / 7 mph 57 / 58°F 88% 1024 mb
Low level cloud: 83%
Mid level cloud: 67%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

6 / 7 mph 69 / 68°F 65% 1021 mb
Low level cloud: 9%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

8 / 9 mph 65 / 64°F 73% 1020 mb
Low level cloud: 2%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

5 / 9 mph 57 / 56°F 91% 1020 mb
Low level cloud: 8%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WNW
WNW

3 / 6 mph 54 / 54°F 92% 1021 mb
Low level cloud: 8%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 18
Dec
16:00

WNW
WNW

3 / 4 mph 66 / 65°F 46% 1018 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

4 / 6 mph 61 / 61°F 59% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

4 / 9 mph 54 / 54°F 69% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 19
Dec
01:00

SSW
SSW

4 / 9 mph 53 / 52°F 81% 1019 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 99%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

2 / 5 mph 51 / 52°F 90% 1019 mb
Low level cloud: 33%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

3 / 7 mph 52 / 51°F 91% 1019 mb
Low level cloud: 20%
Mid level cloud: 5%
High level cloud: 99%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

4 / 4 mph 61 / 60°F 74% 1020 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 32%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

5 / 5 mph 67 / 67°F 56% 1018 mb
Low level cloud: 77%
Mid level cloud: 44%
High level cloud: 97%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

4 / 6 mph 64 / 64°F 65% 1017 mb
Low level cloud: 96%
Mid level cloud: 77%
High level cloud: 56%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

3 / 4 mph 61 / 61°F 76% 1018 mb
Low level cloud: 99%
Mid level cloud: 43%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

3 / 4 mph 60 / 60°F 80% 1018 mb
Low level cloud: 90%
Mid level cloud: 61%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 20
Dec
01:00

W
W

2 / 4 mph 59 / 60°F 86% 1019 mb
Low level cloud: 77%
Mid level cloud: 27%
High level cloud: 89%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

2 / 4 mph 58 / 60°F 87% 1019 mb
Low level cloud: 73%
Mid level cloud: 82%
High level cloud: 21%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SE
SE

1 / 1 mph 58 / 58°F 92% 1018 mb
Low level cloud: 81%
Mid level cloud: 43%
High level cloud: 16%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ESE
ESE

4 / 5 mph 61 / 61°F 85% 1018 mb
Low level cloud: 55%
Mid level cloud: 85%
High level cloud: 3%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

2 / 3 mph 64 / 63°F 74% 1016 mb
Low level cloud: 39%
Mid level cloud: 96%
High level cloud: 19%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

4 / 8 mph 63 / 63°F 77% 1014 mb
Low level cloud: 95%
Mid level cloud: 95%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

7 / 11 mph 62 / 62°F 87% 1015 mb
Low level cloud: 84%
Mid level cloud: 64%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

12 / 22 mph 60 / 60°F 83% 1015 mb
Low level cloud: 86%
Mid level cloud: 89%
High level cloud: 90%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 21
Dec
01:00

SSW
SSW

11 / 20 mph 58 / 55°F 88% 1014 mb
Low level cloud: 80%
Mid level cloud: 45%
High level cloud: 33%
Most Significant Cloud Type: low
99%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
04:00

S
S

8 / 15 mph 57 / 55°F 89% 1014 mb
Low level cloud: 76%
Mid level cloud: 61%
High level cloud: 74%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

6 / 12 mph 56 / 55°F 92% 1014 mb
Low level cloud: 99%
Mid level cloud: 84%
High level cloud: 36%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
10:00

SSW
SSW

5 / 8 mph 59 / 59°F 93% 1016 mb
Low level cloud: 99%
Mid level cloud: 44%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
13:00

WSW
WSW

2 / 2 mph 62 / 62°F 94% 1016 mb
Low level cloud: 95%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

2 / 2 mph 62 / 62°F 88% 1016 mb
Low level cloud: 83%
Mid level cloud: 27%
High level cloud: 97%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ESE
ESE

1 / 2 mph 61 / 61°F 92% 1017 mb
Low level cloud: 56%
Mid level cloud: 27%
High level cloud: 11%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

2 / 2 mph 59 / 61°F 93% 1018 mb
Low level cloud: 74%
Mid level cloud: 58%
High level cloud: 87%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 22
Dec
01:00

NW
NW

3 / 5 mph 56 / 56°F 92% 1018 mb
Low level cloud: 70%
Mid level cloud: 54%
High level cloud: 40%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

3 / 5 mph 55 / 55°F 91% 1017 mb
Low level cloud: 84%
Mid level cloud: 94%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

2 / 4 mph 55 / 56°F 92% 1017 mb
Low level cloud: 54%
Mid level cloud: 77%
High level cloud: 100%
Most Significant Cloud Type: low
92%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

WNW
WNW

2 / 4 mph 58 / 58°F 82% 1018 mb
Low level cloud: 30%
Mid level cloud: 83%
High level cloud: 100%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ENE
ENE

1 / 1 mph 59 / 59°F 77% 1016 mb
Low level cloud: 53%
Mid level cloud: 72%
High level cloud: 100%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ENE
ENE

2 / 2 mph 59 / 59°F 88% 1015 mb
Low level cloud: 62%
Mid level cloud: 91%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNE
NNE

2 / 2 mph 58 / 60°F 94% 1014 mb
Low level cloud: 86%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

NNW
NNW

3 / 4 mph 57 / 57°F 96% 1014 mb
Low level cloud: 97%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
Tue 23
Dec
01:00

ENE
ENE

2 / 2 mph 54 / 55°F 97% 1011 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
04:00

NNE
NNE

2 / 2 mph 54 / 54°F 98% 1010 mb
Low level cloud: 99%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
07:00

E
E

4 / 5 mph 54 / 53°F 98% 1009 mb
Low level cloud: 93%
Mid level cloud: 83%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

ESE
ESE

3 / 4 mph 57 / 58°F 90% 1009 mb
Low level cloud: 54%
Mid level cloud: 100%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

5 / 6 mph 64 / 63°F 69% 1006 mb
Low level cloud: 36%
Mid level cloud: 96%
High level cloud: 100%
Most Significant Cloud Type: low
81%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

SSE
SSE

11 / 18 mph 61 / 61°F 69% 1003 mb
Low level cloud: 63%
Mid level cloud: 57%
High level cloud: 67%
Most Significant Cloud Type: low
90%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

SSE
SSE

16 / 25 mph 59 / 56°F 78% 1003 mb
Low level cloud: 31%
Mid level cloud: 93%
High level cloud: 97%
Most Significant Cloud Type: medium
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
22:00

S
S

15 / 23 mph 59 / 56°F 82% 1003 mb
Low level cloud: 95%
Mid level cloud: 72%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 24
Dec
04:00

WSW
WSW

6 / 9 mph 52 / 50°F 79% 1014 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 32%
Most Significant Cloud Type: medium
31%
0.0 In
10:00

W
W

5 / 9 mph 52 / 50°F 67% 1018 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
0.0 In
16:00

SSE
SSE

4 / 8 mph 58 / 58°F 85% 1000 mb
Low level cloud: 30%
Mid level cloud: 100%
High level cloud: 33%
Most Significant Cloud Type: medium
100%
0.0 In
22:00

SE
SE

8 / 16 mph 54 / 52°F 95% 1010 mb
Low level cloud: 68%
Mid level cloud: 70%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Thu 25
Dec
04:00

NNE
NNE

10 / 19 mph 49 / 45°F 98% 1009 mb
Low level cloud: 100%
Mid level cloud: 92%
High level cloud: 34%
Most Significant Cloud Type: low
100%
0.0 In
10:00

NE
NE

6 / 13 mph 51 / 49°F 98% 1014 mb
Low level cloud: 100%
Mid level cloud: 63%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
16:00

SE
SE

11 / 21 mph 56 / 53°F 79% 1008 mb
Low level cloud: 95%
Mid level cloud: 100%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
22:00

SE
SE

19 / 40 mph 55 / 51°F 80% 1007 mb
Low level cloud: 17%
Mid level cloud: 34%
High level cloud: 100%
Most Significant Cloud Type: low
41%
0.0 In
Fri 26
Dec
04:00

N
N

4 / 7 mph 48 / 47°F 96% 1007 mb
Low level cloud: 78%
Mid level cloud: 69%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.7 In
10:00

ESE
ESE

10 / 22 mph 54 / 51°F 94% 1007 mb
Low level cloud: 62%
Mid level cloud: 53%
High level cloud: 100%
Most Significant Cloud Type: low
92%
0.5 In
16:00

NE
NE

5 / 11 mph 52 / 51°F 87% 1013 mb
Low level cloud: 82%
Mid level cloud: 44%
High level cloud: 8%
Most Significant Cloud Type: low
98%
0.2 In
22:00

NNE
NNE

4 / 10 mph 55 / 55°F 98% 1008 mb
Low level cloud: 92%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
Sat 27
Dec
04:00

N
N

2 / 4 mph 44 / 44°F 92% 1014 mb
Low level cloud: 29%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: low
51%
0.0 In
10:00

NNE
NNE

5 / 10 mph 55 / 54°F 86% 1012 mb
Low level cloud: 34%
Mid level cloud: 45%
High level cloud: 15%
Most Significant Cloud Type: low
51%
0.1 In
16:00

WNW
WNW

5 / 11 mph 56 / 55°F 62% 1014 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
22:00

NW
NW

2 / 5 mph 56 / 56°F 84% 1013 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 6%
Most Significant Cloud Type: medium
10%
0.0 In
Sun 28
Dec
04:00

W
W

1 / 2 mph 46 / 46°F 90% 1018 mb
Low level cloud: 27%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: low
39%
0.0 In
10:00

SSW
SSW

2 / 5 mph 58 / 59°F 72% 1015 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 1%
Most Significant Cloud Type: medium
43%
0.0 In
16:00

SSE
SSE

1 / 2 mph 56 / 56°F 66% 1020 mb
Low level cloud: 52%
Mid level cloud: 31%
High level cloud: 1%
Most Significant Cloud Type: low
62%
0.0 In
22:00

WSW
WSW

9 / 18 mph 49 / 46°F 81% 1016 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
0.0 In
Mon 29
Dec
04:00

ESE
ESE

5 / 11 mph 49 / 46°F 82% 1021 mb
Low level cloud: 100%
Mid level cloud: 94%
High level cloud: 35%
Most Significant Cloud Type: low
100%
0.0 In
10:00

W
W

6 / 13 mph 55 / 53°F 61% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
16:00

NNE
NNE

4 / 9 mph 54 / 53°F 78% 1023 mb
Low level cloud: 40%
Mid level cloud: 5%
High level cloud: 67%
Most Significant Cloud Type: low
49%
0.0 In
22:00

NW
NW

3 / 7 mph 51 / 50°F 80% 1020 mb
Low level cloud: 11%
Mid level cloud: 4%
High level cloud: 32%
Most Significant Cloud Type: low
16%
0.0 In
Tue 30
Dec
04:00

ESE
ESE

3 / 6 mph 45 / 44°F 90% 1024 mb
Low level cloud: 7%
Mid level cloud: 95%
High level cloud: 21%
Most Significant Cloud Type: medium
100%
0.0 In
10:00

N
N

4 / 7 mph 51 / 51°F 60% 1022 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 18%
Most Significant Cloud Type: medium
24%
0.0 In
16:00

NNE
NNE

5 / 10 mph 54 / 53°F 72% 1025 mb
Low level cloud: 76%
Mid level cloud: 46%
High level cloud: 4%
Most Significant Cloud Type: low
92%
0.0 In
22:00

SE
SE

1 / 3 mph 51 / 51°F 65% 1023 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 44%
Most Significant Cloud Type: medium
19%
0.0 In
Wed 31
Dec
04:00

N
N

1 / 2 mph 50 / 50°F 91% 1028 mb
Low level cloud: 20%
Mid level cloud: 12%
High level cloud: 8%
Most Significant Cloud Type: low
24%
0.0 In
10:00

E
E

6 / 12 mph 50 / 48°F 75% 1024 mb
Low level cloud: 1%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: medium
53%
0.0 In
16:00

E
E

3 / 7 mph 62 / 62°F 71% 1026 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 88%
Most Significant Cloud Type: medium
12%
0.0 In
22:00

SSE
SSE

6 / 14 mph 49 / 46°F 91% 1020 mb
Low level cloud: 85%
Mid level cloud: 69%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
Thu 01
Jan
04:00

SE
SE

3 / 6 mph 52 / 52°F 88% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
2%
0.0 In
10:00

SSW
SSW

5 / 10 mph 52 / 51°F 89% 1016 mb
Low level cloud: 45%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
61%
0.0 In
16:00

SSE
SSE

2 / 4 mph 63 / 63°F 69% 1019 mb
Low level cloud: 6%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: medium
30%
0.0 In
22:00

WSW
WSW

11 / 23 mph 51 / 47°F 76% 1013 mb
Low level cloud: 48%
Mid level cloud: 85%
High level cloud: 0%
Most Significant Cloud Type: low
78%
0.1 In

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