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Brest 14 Day Long Range Forecast

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

France

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

For Brest in the coming two weeks the average daytime maximum temperature will be around 17°C, with a high for the two weeks of 19°C expected on the afternoon of Monday 19th. The mean minimum temperature will be 11°C, dipping to its lowest on the morning of Sunday 18th at 9°C. The coming 14 days will have some days seeing a little precipitation and some days with rain. Current predictions suggest Monday 12th will have the most precipitation with an accumulation of around 9.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 12
May
13:00

NE
NE

5 / 7 mph 62 / 59°F 72% 1008 mb
Low level cloud: 64%
Mid level cloud: 26%
High level cloud: 9%
Most Significant Cloud Type: low
74%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

NE
NE

2 / 4 mph 63 / 60°F 74% 1007 mb
Low level cloud: 31%
Mid level cloud: 29%
High level cloud: 32%
Most Significant Cloud Type: low
44%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

SW
SW

3 / 5 mph 57 / 58°F 87% 1008 mb
Low level cloud: 0%
Mid level cloud: 99%
High level cloud: 32%
Most Significant Cloud Type: medium
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

S
S

7 / 13 mph 53 / 51°F 93% 1009 mb
Low level cloud: 6%
Mid level cloud: 17%
High level cloud: 3%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 13
May
01:00

SE
SE

9 / 15 mph 52 / 49°F 95% 1010 mb
Low level cloud: 18%
Mid level cloud: 30%
High level cloud: 17%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SE
SE

9 / 17 mph 51 / 47°F 96% 1011 mb
Low level cloud: 42%
Mid level cloud: 11%
High level cloud: 17%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SE
SE

10 / 16 mph 53 / 49°F 95% 1013 mb
Low level cloud: 39%
Mid level cloud: 19%
High level cloud: 37%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SE
SE

11 / 15 mph 59 / 55°F 81% 1014 mb
Low level cloud: 28%
Mid level cloud: 55%
High level cloud: 33%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SE
SE

11 / 17 mph 62 / 62°F 73% 1015 mb
Low level cloud: 77%
Mid level cloud: 14%
High level cloud: 22%
Most Significant Cloud Type: low
84%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

S
S

10 / 15 mph 65 / 63°F 63% 1015 mb
Low level cloud: 31%
Mid level cloud: 14%
High level cloud: 14%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

5 / 7 mph 64 / 61°F 75% 1016 mb
Low level cloud: 25%
Mid level cloud: 33%
High level cloud: 18%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

2 / 4 mph 55 / 56°F 89% 1017 mb
Low level cloud: 40%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 14
May
01:00

ESE
ESE

4 / 7 mph 54 / 53°F 91% 1017 mb
Low level cloud: 5%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ESE
ESE

3 / 6 mph 53 / 52°F 91% 1017 mb
Low level cloud: 4%
Mid level cloud: 20%
High level cloud: 12%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

3 / 5 mph 55 / 54°F 88% 1018 mb
Low level cloud: 29%
Mid level cloud: 46%
High level cloud: 29%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

5 / 6 mph 63 / 60°F 77% 1018 mb
Low level cloud: 1%
Mid level cloud: 23%
High level cloud: 34%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NE
NE

6 / 9 mph 66 / 63°F 73% 1019 mb
Low level cloud: 22%
Mid level cloud: 20%
High level cloud: 20%
Most Significant Cloud Type: low
31%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

NNE
NNE

8 / 12 mph 65 / 63°F 76% 1018 mb
Low level cloud: 14%
Mid level cloud: 18%
High level cloud: 16%
Most Significant Cloud Type: low
22%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

NNE
NNE

9 / 12 mph 60 / 58°F 83% 1019 mb
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
22:00

NNE
NNE

8 / 14 mph 55 / 53°F 95% 1020 mb
Low level cloud: 11%
Mid level cloud: 11%
High level cloud: 32%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 15
May
01:00

NE
NE

8 / 16 mph 54 / 51°F 89% 1021 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 30%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

10 / 20 mph 52 / 48°F 88% 1021 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 6%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

11 / 20 mph 52 / 48°F 84% 1022 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 7%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

16 / 22 mph 59 / 56°F 67% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NE
NE

16 / 21 mph 63 / 62°F 61% 1024 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
16:00

NE
NE

16 / 21 mph 61 / 60°F 56% 1024 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
19:00

NE
NE

12 / 17 mph 56 / 53°F 68% 1025 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

NNE
NNE

8 / 14 mph 53 / 50°F 84% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 16
May
01:00

NNE
NNE

5 / 11 mph 51 / 49°F 87% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 97%
Most Significant Cloud Type: high
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

4 / 9 mph 51 / 50°F 90% 1024 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 3%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

6 / 11 mph 55 / 51°F 91% 1024 mb
Low level cloud: 3%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

11 / 15 mph 59 / 56°F 70% 1024 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NE
NE

13 / 17 mph 61 / 60°F 65% 1024 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
16:00

NE
NE

15 / 20 mph 62 / 61°F 68% 1023 mb
Low level cloud: 23%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

15 / 22 mph 58 / 55°F 79% 1023 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

11 / 18 mph 54 / 51°F 87% 1024 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
Sat 17
May
01:00

ENE
ENE

9 / 17 mph 52 / 49°F 90% 1024 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

9 / 19 mph 51 / 48°F 89% 1024 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
07:00

ENE
ENE

10 / 18 mph 53 / 48°F 85% 1024 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
10:00

ENE
ENE

13 / 19 mph 61 / 60°F 60% 1024 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
13:00

NE
NE

15 / 19 mph 64 / 63°F 55% 1024 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
16:00

NE
NE

15 / 21 mph 62 / 61°F 54% 1023 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
19:00

NE
NE

13 / 20 mph 57 / 53°F 68% 1023 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

NE
NE

9 / 16 mph 53 / 50°F 80% 1023 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
Sun 18
May
01:00

ENE
ENE

9 / 19 mph 50 / 47°F 82% 1022 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
04:00

ENE
ENE

10 / 19 mph 49 / 46°F 90% 1021 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
07:00

ENE
ENE

10 / 18 mph 51 / 46°F 89% 1021 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ENE
ENE

14 / 19 mph 60 / 56°F 67% 1021 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NE
NE

14 / 19 mph 64 / 63°F 56% 1020 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NE
NE

15 / 21 mph 64 / 63°F 58% 1020 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

14 / 22 mph 59 / 55°F 71% 1019 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

ENE
ENE

11 / 19 mph 53 / 50°F 85% 1020 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
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 19
May
01:00

ENE
ENE

8 / 16 mph 55 / 53°F 75% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

SSW
SSW

7 / 16 mph 55 / 54°F 90% 1027 mb
Low level cloud: 9%
Mid level cloud: 6%
High level cloud: 84%
Most Significant Cloud Type: medium
34%
0.0 In
13:00

NE
NE

13 / 28 mph 66 / 66°F 64% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
19:00

WNW
WNW

4 / 9 mph 69 / 69°F 68% 1024 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
5%
0.0 In
Tue 20
May
01:00

NE
NE

11 / 23 mph 52 / 48°F 91% 1013 mb
Low level cloud: 0%
Mid level cloud: 42%
High level cloud: 36%
Most Significant Cloud Type: medium
45%
0.0 In
07:00

ENE
ENE

10 / 21 mph 53 / 49°F 82% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

W
W

17 / 35 mph 58 / 54°F 89% 1011 mb
Low level cloud: 70%
Mid level cloud: 43%
High level cloud: 4%
Most Significant Cloud Type: low
85%
0.0 In
19:00

NE
NE

13 / 27 mph 61 / 61°F 70% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Wed 21
May
01:00

W
W

9 / 20 mph 54 / 52°F 96% 1016 mb
Low level cloud: 54%
Mid level cloud: 8%
High level cloud: 72%
Most Significant Cloud Type: low
65%
0.0 In
07:00

ENE
ENE

10 / 21 mph 52 / 49°F 75% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

SSW
SSW

12 / 26 mph 60 / 60°F 67% 1016 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
52%
0.0 In
19:00

NE
NE

13 / 28 mph 62 / 62°F 68% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Thu 22
May
01:00

S
S

11 / 23 mph 54 / 50°F 96% 1012 mb
Low level cloud: 68%
Mid level cloud: 100%
High level cloud: 94%
Most Significant Cloud Type: low
100%
0.1 In
07:00

ENE
ENE

8 / 17 mph 54 / 51°F 66% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

SW
SW

18 / 38 mph 58 / 55°F 75% 1010 mb
Low level cloud: 20%
Mid level cloud: 25%
High level cloud: 9%
Most Significant Cloud Type: low
29%
0.2 In
19:00

NNE
NNE

11 / 24 mph 63 / 63°F 74% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Fri 23
May
01:00

SW
SW

15 / 32 mph 54 / 50°F 92% 1009 mb
Low level cloud: 50%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
53%
0.1 In
07:00

NNW
NNW

5 / 11 mph 57 / 56°F 85% 1017 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
13:00

NE
NE

6 / 13 mph 59 / 58°F 82% 1008 mb
Low level cloud: 74%
Mid level cloud: 44%
High level cloud: 15%
Most Significant Cloud Type: low
91%
0.0 In
19:00

NW
NW

10 / 22 mph 59 / 57°F 71% 1014 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 97%
Most Significant Cloud Type: medium
14%
0.0 In
Sat 24
May
01:00

SSW
SSW

12 / 25 mph 57 / 54°F 98% 1010 mb
Low level cloud: 99%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
07:00

WNW
WNW

12 / 25 mph 53 / 49°F 92% 1011 mb
Low level cloud: 80%
Mid level cloud: 1%
High level cloud: 15%
Most Significant Cloud Type: low
82%
0.0 In
13:00

SSE
SSE

18 / 38 mph 64 / 64°F 78% 1007 mb
Low level cloud: 39%
Mid level cloud: 49%
High level cloud: 82%
Most Significant Cloud Type: low
65%
0.0 In
19:00

NW
NW

13 / 27 mph 58 / 56°F 74% 1010 mb
Low level cloud: 19%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
20%
0.0 In
Sun 25
May
01:00

S
S

10 / 21 mph 57 / 55°F 96% 1005 mb
Low level cloud: 63%
Mid level cloud: 72%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
07:00

NW
NW

10 / 21 mph 53 / 50°F 83% 1010 mb
Low level cloud: 39%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
66%
0.0 In
13:00

SSW
SSW

14 / 29 mph 62 / 62°F 70% 1005 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.1 In
19:00

NNW
NNW

14 / 29 mph 56 / 53°F 66% 1016 mb
Low level cloud: 60%
Mid level cloud: 4%
High level cloud: 35%
Most Significant Cloud Type: low
65%
0.0 In
Mon 26
May
01:00

SSE
SSE

10 / 21 mph 56 / 54°F 92% 1007 mb
Low level cloud: 34%
Mid level cloud: 29%
High level cloud: 22%
Most Significant Cloud Type: low
46%
0.0 In
07:00

SW
SW

3 / 6 mph 55 / 56°F 77% 1022 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 1%
Most Significant Cloud Type: medium
4%
0.0 In
13:00

SSW
SSW

20 / 43 mph 61 / 61°F 73% 1009 mb
Low level cloud: 5%
Mid level cloud: 8%
High level cloud: 79%
Most Significant Cloud Type: medium
25%
0.0 In
19:00

WNW
WNW

8 / 17 mph 57 / 55°F 68% 1025 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
4%
0.0 In
Tue 27
May
01:00

S
S

22 / 47 mph 57 / 53°F 87% 1009 mb
Low level cloud: 69%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
85%
0.1 In
07:00

SSE
SSE

4 / 8 mph 55 / 55°F 87% 1027 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
0.0 In
13:00

SSW
SSW

20 / 43 mph 60 / 60°F 82% 1011 mb
Low level cloud: 42%
Mid level cloud: 12%
High level cloud: 3%
Most Significant Cloud Type: low
46%
0.1 In
19:00

W
W

3 / 7 mph 66 / 65°F 69% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: high
7%
0.0 In

Other Locations Near to Brest

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