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Local Weather

Tan-y-fron 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Tan-y-fron

Denbighshire, United Kingdom

Long range weather outlook for Tan-y-fron includes 14 day forecast summary:

The next 14 day outlook for Tan-y-fron shows the average daytime maximum temperature will be around 25°C, with a high for the two weeks of 32°C expected on the afternoon of Saturday 30th. The average minimum temperature will be 12°C, dipping to its lowest on the morning of Friday 22nd at 7°C. The fortnight ahead will remain predominantly dry. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 22
Jun
15:00

NNW
NNW

9 / 10 mph 64 / 62°F 59% 1031 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 10%
Most Significant Cloud Type: medium
7%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

NW
NW

7 / 8 mph 63 / 61°F 67% 1031 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 9%
Most Significant Cloud Type: medium
13%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

WNW
WNW

4 / 9 mph 49 / 47°F 86% 1031 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 5%
Most Significant Cloud Type: medium
16%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Sat 23
Jun
00:00

W
W

5 / 10 mph 47 / 44°F 80% 1031 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 11%
Most Significant Cloud Type: medium
8%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

W
W

5 / 11 mph 45 / 43°F 78% 1031 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 70%
Most Significant Cloud Type: medium
9%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

WNW
WNW

5 / 6 mph 55 / 52°F 78% 1030 mb
Low level cloud: 6%
Mid level cloud: 44%
High level cloud: 42%
Most Significant Cloud Type: medium
60%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

NW
NW

6 / 6 mph 65 / 62°F 67% 1030 mb
Low level cloud: 8%
Mid level cloud: 5%
High level cloud: 60%
Most Significant Cloud Type: low
17%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

NNW
NNW

7 / 9 mph 68 / 66°F 64% 1029 mb
Low level cloud: 9%
Mid level cloud: 3%
High level cloud: 86%
Most Significant Cloud Type: medium
30%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

NNW
NNW

8 / 9 mph 68 / 66°F 67% 1028 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 88%
Most Significant Cloud Type: medium
9%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

NNW
NNW

6 / 7 mph 66 / 64°F 72% 1027 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 70%
Most Significant Cloud Type: medium
5%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

WNW
WNW

2 / 5 mph 53 / 52°F 91% 1028 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 54%
Most Significant Cloud Type: medium
6%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Sun 24
Jun
00:00

WSW
WSW

3 / 6 mph 48 / 47°F 84% 1028 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 11%
Most Significant Cloud Type: medium
5%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

WSW
WSW

2 / 5 mph 46 / 46°F 79% 1027 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 5%
Most Significant Cloud Type: medium
5%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

SW
SW

2 / 4 mph 55 / 55°F 74% 1027 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 1%
Most Significant Cloud Type: high
1%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

NNE
NNE

2 / 3 mph 69 / 67°F 59% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
4%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

NNE
NNE

4 / 5 mph 74 / 76°F 52% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

NNE
NNE

6 / 7 mph 74 / 76°F 54% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

N
N

6 / 6 mph 74 / 76°F 67% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

NE
NE

1 / 1 mph 63 / 61°F 84% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Mon 25
Jun
00:00

SSW
SSW

3 / 6 mph 51 / 51°F 79% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

SSW
SSW

4 / 8 mph 51 / 51°F 83% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: high
10%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

SSW
SSW

2 / 4 mph 60 / 60°F 81% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: high
6%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

NE
NE

2 / 2 mph 75 / 76°F 64% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: high
8%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

NNE
NNE

5 / 5 mph 78 / 78°F 58% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: high
6%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

NNE
NNE

6 / 7 mph 78 / 78°F 59% 1026 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 13%
Most Significant Cloud Type: low
10%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

NNE
NNE

5 / 6 mph 74 / 76°F 66% 1026 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 21%
Most Significant Cloud Type: low
11%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

NNE
NNE

2 / 3 mph 59 / 57°F 76% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: high
17%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Tue 26
Jun
00:00

S
S

2 / 3 mph 55 / 55°F 78% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 79%
Most Significant Cloud Type: high
79%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

SSE
SSE

4 / 8 mph 55 / 54°F 81% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
32%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

SSE
SSE

4 / 9 mph 62 / 60°F 82% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: high
7%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

ESE
ESE

5 / 6 mph 77 / 77°F 66% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

ESE
ESE

9 / 10 mph 80 / 80°F 54% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

ESE
ESE

9 / 10 mph 82 / 81°F 51% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

ESE
ESE

8 / 9 mph 82 / 82°F 67% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

SE
SE

6 / 12 mph 68 / 65°F 87% 1025 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: high
10%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Wed 27
Jun
00:00

SSE
SSE

6 / 13 mph 59 / 59°F 91% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 15%
Most Significant Cloud Type: high
15%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

SSE
SSE

7 / 15 mph 53 / 51°F 73% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: high
7%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

SE
SE

7 / 12 mph 57 / 54°F 74% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: high
7%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

SE
SE

9 / 11 mph 70 / 68°F 59% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

ESE
ESE

10 / 12 mph 77 / 78°F 53% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

ESE
ESE

11 / 12 mph 79 / 79°F 52% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

ESE
ESE

9 / 11 mph 77 / 78°F 61% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

ESE
ESE

9 / 14 mph 67 / 66°F 80% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Thu 28
Jun
00:00

SE
SE

7 / 9 mph 60 / 60°F 87% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

SE
SE

6 / 12 mph 54 / 53°F 89% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

SE
SE

6 / 11 mph 59 / 56°F 81% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

ESE
ESE

7 / 8 mph 74 / 76°F 69% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

ESE
ESE

8 / 9 mph 82 / 83°F 61% 1021 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
4%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

ESE
ESE

8 / 9 mph 86 / 86°F 59% 1020 mb
Low level cloud: 32%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
32%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

E
E

5 / 5 mph 84 / 85°F 70% 1020 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

E
E

2 / 5 mph 72 / 69°F 84% 1022 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 29
Jun
00:00

SE
SE

6 / 12 mph 65 / 65°F 92% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.00 In
06:00

NW
NW

8 / 9 mph 56 / 54°F 87% 1019 mb
Low level cloud: 26%
Mid level cloud: 4%
High level cloud: 1%
Most Significant Cloud Type: low
27%
0.00 In
12:00

ESE
ESE

7 / 8 mph 78 / 80°F 60% 1026 mb
Low level cloud: 22%
Mid level cloud: 5%
High level cloud: 1%
Most Significant Cloud Type: low
23%
0.00 In
18:00

NE
NE

5 / 6 mph 78 / 81°F 66% 1021 mb
Low level cloud: 7%
Mid level cloud: 14%
High level cloud: 73%
Most Significant Cloud Type: medium
37%
0.00 In
Sat 30
Jun
00:00

SSE
SSE

6 / 11 mph 59 / 59°F 86% 1024 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 2%
Most Significant Cloud Type: medium
13%
0.00 In
06:00

SSE
SSE

5 / 9 mph 59 / 58°F 71% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.00 In
12:00

NW
NW

8 / 9 mph 70 / 70°F 74% 1016 mb
Low level cloud: 54%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
56%
0.00 In
18:00

NE
NE

5 / 5 mph 86 / 95°F 66% 1022 mb
Low level cloud: 1%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.00 In
Sun 01
Jul
00:00

WNW
WNW

4 / 5 mph 56 / 56°F 87% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
2%
0.00 In
06:00

S
S

1 / 1 mph 74 / 78°F 82% 1024 mb
Low level cloud: 3%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
0.00 In
12:00

N
N

9 / 10 mph 63 / 63°F 63% 1018 mb
Low level cloud: 0%
Mid level cloud: 42%
High level cloud: 28%
Most Significant Cloud Type: medium
42%
0.00 In
18:00

NE
NE

6 / 7 mph 80 / 84°F 73% 1023 mb
Low level cloud: 16%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
18%
0.00 In
Mon 02
Jul
00:00

NNW
NNW

5 / 9 mph 53 / 51°F 96% 1020 mb
Low level cloud: 6%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
7%
0.00 In
06:00

SE
SE

4 / 5 mph 64 / 64°F 83% 1024 mb
Low level cloud: 1%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.00 In
12:00

N
N

6 / 6 mph 72 / 72°F 60% 1020 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 3%
Most Significant Cloud Type: medium
8%
0.00 In
18:00

NE
NE

8 / 9 mph 75 / 79°F 73% 1022 mb
Low level cloud: 14%
Mid level cloud: 6%
High level cloud: 5%
Most Significant Cloud Type: low
16%
0.00 In
Tue 03
Jul
00:00

SSW
SSW

2 / 3 mph 57 / 58°F 80% 1020 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.00 In
06:00

E
E

6 / 7 mph 60 / 60°F 87% 1020 mb
Low level cloud: 19%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
24%
0.00 In
12:00

W
W

6 / 7 mph 75 / 78°F 60% 1019 mb
Low level cloud: 2%
Mid level cloud: 10%
High level cloud: 1%
Most Significant Cloud Type: medium
14%
0.00 In
18:00

E
E

6 / 7 mph 68 / 68°F 77% 1015 mb
Low level cloud: 64%
Mid level cloud: 7%
High level cloud: 39%
Most Significant Cloud Type: low
70%
0.01 In
Wed 04
Jul
00:00

WSW
WSW

5 / 8 mph 56 / 55°F 96% 1020 mb
Low level cloud: 21%
Mid level cloud: 0%
High level cloud: 42%
Most Significant Cloud Type: low
26%
0.00 In
06:00

SSE
SSE

5 / 6 mph 58 / 58°F 94% 1011 mb
Low level cloud: 39%
Mid level cloud: 11%
High level cloud: 9%
Most Significant Cloud Type: low
43%
0.00 In
12:00

WSW
WSW

6 / 7 mph 73 / 76°F 53% 1020 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 16%
Most Significant Cloud Type: medium
28%
0.00 In
18:00

NW
NW

5 / 7 mph 74 / 77°F 77% 1007 mb
Low level cloud: 27%
Mid level cloud: 26%
High level cloud: 11%
Most Significant Cloud Type: low
36%
0.04 In
Thu 05
Jul
00:00

SW
SW

8 / 14 mph 52 / 50°F 91% 1020 mb
Low level cloud: 3%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
0.00 In
06:00

WSW
WSW

4 / 4 mph 61 / 61°F 95% 1006 mb
Low level cloud: 52%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: low
72%
0.00 In
12:00

WSW
WSW

8 / 9 mph 72 / 76°F 74% 1020 mb
Low level cloud: 74%
Mid level cloud: 13%
High level cloud: 32%
Most Significant Cloud Type: low
82%
0.01 In
18:00

NW
NW

13 / 16 mph 63 / 63°F 73% 1007 mb
Low level cloud: 10%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
17%
0.03 In
Fri 06
Jul
00:00

WSW
WSW

5 / 7 mph 60 / 60°F 97% 1022 mb
Low level cloud: 78%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
97%
0.04 In
06:00

NW
NW

12 / 14 mph 55 / 52°F 88% 1014 mb
Low level cloud: 64%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
67%
0.00 In
12:00

NNW
NNW

11 / 12 mph 65 / 65°F 63% 1026 mb
Low level cloud: 6%
Mid level cloud: 22%
High level cloud: 36%
Most Significant Cloud Type: medium
40%
0.05 In
18:00

NW
NW

13 / 15 mph 60 / 60°F 68% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.00 In
Sat 07
Jul
00:00

NNW
NNW

6 / 9 mph 50 / 48°F 93% 1028 mb
Low level cloud: 11%
Mid level cloud: 0%
High level cloud: 19%
Most Significant Cloud Type: low
12%
0.00 In
06:00

NW
NW

7 / 9 mph 53 / 51°F 87% 1027 mb
Low level cloud: 8%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
9%
0.00 In
12:00

NNW
NNW

2 / 2 mph 63 / 63°F 80% 1026 mb
Low level cloud: 41%
Mid level cloud: 57%
High level cloud: 52%
Most Significant Cloud Type: low
67%
0.02 In
18:00

NNW
NNW

8 / 9 mph 65 / 65°F 63% 1029 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.00 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