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Myndd Llandegai 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Myndd Llandegai

Gwynedd, United Kingdom

Long range weather outlook for Myndd Llandegai includes 14 day forecast summary:

Reviewing the forecast for Myndd Llandegai Over the next 14 days and the average daytime maximum temperature will be around 18°C, with a high for the two weeks of 21°C expected on the afternoon of Tuesday 20th. The mean minimum temperature will be 9°C, dipping to its lowest on the morning of Friday 16th at 7°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. It looks like Monday 12th will have the most precipitation with an accumulation of around 7.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 12
May
15:00

E
E

9 / 15 mph 67 / 65°F 68% 1011 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 6%
Most Significant Cloud Type: medium
19%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

E
E

4 / 9 mph 66 / 64°F 71% 1012 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
21:00

E
E

5 / 11 mph 55 / 53°F 86% 1014 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 1%
Most Significant Cloud Type: medium
9%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Tue 13
May
00:00

E
E

7 / 15 mph 52 / 49°F 91% 1016 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 22%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

8 / 17 mph 50 / 47°F 91% 1017 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 9%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

8 / 17 mph 52 / 48°F 89% 1018 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 12%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

10 / 13 mph 63 / 61°F 70% 1019 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 13%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

12 / 16 mph 66 / 64°F 65% 1020 mb
Low level cloud: 29%
Mid level cloud: 4%
High level cloud: 4%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

13 / 19 mph 65 / 64°F 61% 1019 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 1%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

8 / 16 mph 62 / 60°F 70% 1019 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
21:00

E
E

6 / 13 mph 55 / 52°F 79% 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
Wed 14
May
00:00

ESE
ESE

7 / 15 mph 49 / 46°F 82% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

6 / 14 mph 46 / 43°F 81% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 19%
Most Significant Cloud Type: high
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

6 / 13 mph 50 / 46°F 76% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

8 / 11 mph 60 / 58°F 60% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 67%
Most Significant Cloud Type: high
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

10 / 12 mph 61 / 61°F 55% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 99%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

10 / 13 mph 62 / 60°F 60% 1023 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 2%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

6 / 11 mph 58 / 56°F 74% 1023 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 6%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

5 / 10 mph 52 / 49°F 79% 1024 mb
Low level cloud: 4%
Mid level cloud: 7%
High level cloud: 14%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 15
May
00:00

ESE
ESE

5 / 11 mph 49 / 47°F 85% 1024 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 16%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

4 / 7 mph 48 / 47°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
06:00

ENE
ENE

5 / 9 mph 53 / 50°F 83% 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
09:00

NE
NE

7 / 8 mph 59 / 56°F 58% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: high
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

9 / 10 mph 59 / 56°F 58% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 12%
Most Significant Cloud Type: high
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

7 / 8 mph 59 / 56°F 58% 1026 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
18:00

N
N

4 / 6 mph 58 / 57°F 65% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

3 / 5 mph 53 / 52°F 79% 1027 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
Fri 16
May
00:00

E
E

5 / 11 mph 47 / 45°F 81% 1027 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
03:00

E
E

7 / 15 mph 45 / 42°F 86% 1028 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
06:00

E
E

6 / 11 mph 50 / 47°F 85% 1028 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
09:00

ENE
ENE

7 / 9 mph 59 / 57°F 62% 1029 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
12:00

NE
NE

9 / 11 mph 63 / 62°F 51% 1029 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
15:00

NE
NE

9 / 12 mph 63 / 61°F 54% 1029 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
18:00

NE
NE

7 / 11 mph 58 / 55°F 69% 1029 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
21:00

E
E

3 / 7 mph 54 / 52°F 75% 1029 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
00:00

E
E

4 / 8 mph 48 / 47°F 71% 1029 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
03:00

ENE
ENE

3 / 6 mph 48 / 48°F 77% 1029 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
06:00

ENE
ENE

2 / 5 mph 54 / 53°F 76% 1029 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
09:00

NE
NE

7 / 9 mph 62 / 60°F 63% 1029 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
12:00

NE
NE

8 / 11 mph 63 / 61°F 54% 1029 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
15:00

NE
NE

7 / 10 mph 62 / 60°F 45% 1029 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
18:00

NE
NE

4 / 6 mph 61 / 59°F 60% 1029 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
21:00

E
E

4 / 7 mph 53 / 51°F 61% 1029 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
00:00

E
E

3 / 7 mph 48 / 47°F 57% 1029 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
03:00

ESE
ESE

2 / 4 mph 48 / 48°F 58% 1028 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
06:00

E
E

1 / 2 mph 55 / 53°F 68% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNW
NNW

3 / 4 mph 63 / 61°F 61% 1027 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
12:00

NNW
NNW

6 / 7 mph 66 / 64°F 60% 1026 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

5 / 5 mph 64 / 62°F 67% 1026 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
18:00

NE
NE

3 / 4 mph 62 / 60°F 70% 1026 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
21:00

E
E

4 / 9 mph 52 / 50°F 76% 1026 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
00:00

SSW
SSW

4 / 9 mph 51 / 49°F 82% 1030 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
06:00

SSW
SSW

14 / 29 mph 53 / 49°F 89% 1018 mb
Low level cloud: 19%
Mid level cloud: 46%
High level cloud: 19%
Most Significant Cloud Type: low
38%
0.0 In
12:00

NNE
NNE

4 / 8 mph 65 / 65°F 58% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
4%
0.0 In
18:00

SSW
SSW

11 / 24 mph 62 / 62°F 72% 1021 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
50%
0.0 In
Tue 20
May
00:00

ENE
ENE

10 / 20 mph 48 / 44°F 90% 1022 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 9%
Most Significant Cloud Type: medium
3%
0.0 In
06:00

SE
SE

1 / 2 mph 57 / 57°F 71% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

ENE
ENE

14 / 29 mph 59 / 56°F 74% 1012 mb
Low level cloud: 0%
Mid level cloud: 92%
High level cloud: 100%
Most Significant Cloud Type: medium
95%
0.0 In
18:00

E
E

12 / 24 mph 67 / 67°F 56% 1020 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
00:00

E
E

6 / 14 mph 55 / 53°F 95% 1013 mb
Low level cloud: 12%
Mid level cloud: 68%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.1 In
06:00

ENE
ENE

10 / 20 mph 50 / 46°F 70% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

E
E

6 / 12 mph 57 / 56°F 88% 1013 mb
Low level cloud: 90%
Mid level cloud: 28%
High level cloud: 40%
Most Significant Cloud Type: low
100%
0.1 In
18:00

NE
NE

9 / 17 mph 60 / 60°F 68% 1017 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
Thu 22
May
00:00

SSW
SSW

4 / 8 mph 52 / 51°F 89% 1011 mb
Low level cloud: 25%
Mid level cloud: 48%
High level cloud: 16%
Most Significant Cloud Type: low
44%
0.1 In
06:00

E
E

4 / 9 mph 51 / 50°F 64% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
1%
0.0 In
12:00

ENE
ENE

4 / 8 mph 55 / 55°F 87% 1009 mb
Low level cloud: 50%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
96%
0.1 In
18:00

NNE
NNE

2 / 5 mph 62 / 62°F 54% 1019 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 12%
Most Significant Cloud Type: medium
2%
0.0 In
Fri 23
May
00:00

SE
SE

3 / 6 mph 49 / 49°F 87% 1007 mb
Low level cloud: 16%
Mid level cloud: 46%
High level cloud: 96%
Most Significant Cloud Type: low
43%
0.1 In
06:00

SSW
SSW

3 / 5 mph 55 / 56°F 61% 1018 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 58%
Most Significant Cloud Type: medium
48%
0.0 In
12:00

NNW
NNW

5 / 11 mph 57 / 56°F 80% 1008 mb
Low level cloud: 50%
Mid level cloud: 26%
High level cloud: 8%
Most Significant Cloud Type: low
60%
0.0 In
18:00

SW
SW

7 / 13 mph 61 / 61°F 63% 1016 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 19%
Most Significant Cloud Type: medium
7%
0.0 In
Sat 24
May
00:00

S
S

2 / 5 mph 51 / 51°F 89% 1009 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 32%
Most Significant Cloud Type: medium
9%
0.0 In
06:00

SSW
SSW

7 / 15 mph 53 / 50°F 73% 1014 mb
Low level cloud: 45%
Mid level cloud: 42%
High level cloud: 35%
Most Significant Cloud Type: low
63%
0.0 In
12:00

SSW
SSW

2 / 4 mph 62 / 62°F 66% 1007 mb
Low level cloud: 94%
Mid level cloud: 86%
High level cloud: 42%
Most Significant Cloud Type: low
100%
0.0 In
18:00

W
W

6 / 12 mph 58 / 58°F 81% 1012 mb
Low level cloud: 85%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Sun 25
May
00:00

ESE
ESE

5 / 11 mph 56 / 55°F 94% 1007 mb
Low level cloud: 12%
Mid level cloud: 72%
High level cloud: 32%
Most Significant Cloud Type: medium
100%
0.1 In
06:00

NNW
NNW

6 / 11 mph 51 / 49°F 85% 1016 mb
Low level cloud: 61%
Mid level cloud: 3%
High level cloud: 32%
Most Significant Cloud Type: low
66%
0.0 In
12:00

ESE
ESE

6 / 12 mph 60 / 60°F 90% 1005 mb
Low level cloud: 56%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: low
77%
0.3 In
18:00

NW
NW

7 / 15 mph 54 / 52°F 62% 1018 mb
Low level cloud: 3%
Mid level cloud: 14%
High level cloud: 67%
Most Significant Cloud Type: medium
24%
0.0 In
Mon 26
May
00:00

S
S

4 / 7 mph 54 / 54°F 93% 1006 mb
Low level cloud: 7%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
41%
0.3 In
06:00

SSW
SSW

8 / 17 mph 50 / 47°F 77% 1016 mb
Low level cloud: 26%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
54%
0.0 In
12:00

SE
SE

1 / 3 mph 64 / 64°F 76% 1007 mb
Low level cloud: 59%
Mid level cloud: 23%
High level cloud: 31%
Most Significant Cloud Type: low
70%
0.0 In
18:00

SSW
SSW

17 / 33 mph 54 / 49°F 91% 1009 mb
Low level cloud: 87%
Mid level cloud: 69%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
Tue 27
May
00:00

SSE
SSE

5 / 11 mph 52 / 51°F 91% 1008 mb
Low level cloud: 12%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
83%
0.1 In
06:00

WNW
WNW

19 / 39 mph 49 / 42°F 86% 1010 mb
Low level cloud: 26%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
31%
0.1 In
12:00

E
E

1 / 3 mph 61 / 62°F 75% 1010 mb
Low level cloud: 90%
Mid level cloud: 67%
High level cloud: 20%
Most Significant Cloud Type: low
100%
0.1 In
18:00

NW
NW

8 / 16 mph 55 / 53°F 76% 1012 mb
Low level cloud: 45%
Mid level cloud: 31%
High level cloud: 93%
Most Significant Cloud Type: low
67%
0.0 In

Other Locations Near to Myndd Llandegai

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