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Danesbury 14 Day Long Range Forecast

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

Hertfordshire, United Kingdom

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

Over the next 14 days the Danesbury forecast suggests the average daytime maximum temperature will be around 15°C, with a high for the two weeks of 19°C expected on the afternoon of Friday 10th. The mean minimum temperature will be 8°C, dipping to its lowest on the morning of Monday 13th at 3°C. Expect the coming 14 days to have most days seeing a little rain. The indicators are that Monday 6th will have the most precipitation with an accumulation of around 4.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 04
May		15:00

SE
SE

 7 / 8 mph 59 / 56°F 76% 1010 mb
Low level cloud: 16%
Mid level cloud: 45%
High level cloud: 5%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

 4 / 5 mph 58 / 56°F 83% 1009 mb
Low level cloud: 11%
Mid level cloud: 27%
High level cloud: 12%
Most Significant Cloud Type: low
21%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

SE
SE

 5 / 9 mph 50 / 48°F 93% 1010 mb
Low level cloud: 14%
Mid level cloud: 28%
High level cloud: 57%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 05
May		00:00

SSE
SSE

 2 / 5 mph 48 / 48°F 92% 1009 mb
Low level cloud: 4%
Mid level cloud: 21%
High level cloud: 32%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 4 / 8 mph 47 / 45°F 95% 1009 mb
Low level cloud: 17%
Mid level cloud: 23%
High level cloud: 32%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

 4 / 6 mph 48 / 46°F 91% 1009 mb
Low level cloud: 1%
Mid level cloud: 23%
High level cloud: 32%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 6 / 7 mph 57 / 54°F 70% 1009 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 15%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 9 / 11 mph 61 / 60°F 63% 1008 mb
Low level cloud: 85%
Mid level cloud: 31%
High level cloud: 40%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 6 / 8 mph 57 / 54°F 82% 1007 mb
Low level cloud: 26%
Mid level cloud: 31%
High level cloud: 99%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

 5 / 8 mph 59 / 56°F 83% 1007 mb
Low level cloud: 20%
Mid level cloud: 23%
High level cloud: 80%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 4 / 7 mph 52 / 52°F 93% 1007 mb
Low level cloud: 11%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 06
May		00:00

SSW
SSW

 3 / 5 mph 52 / 52°F 93% 1007 mb
Low level cloud: 10%
Mid level cloud: 45%
High level cloud: 61%
Most Significant Cloud Type: medium
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

 1 / 2 mph 51 / 51°F 92% 1007 mb
Low level cloud: 51%
Mid level cloud: 79%
High level cloud: 32%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

 2 / 3 mph 50 / 51°F 92% 1007 mb
Low level cloud: 74%
Mid level cloud: 26%
High level cloud: 98%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

 4 / 6 mph 52 / 52°F 88% 1008 mb
Low level cloud: 94%
Mid level cloud: 44%
High level cloud: 35%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

 7 / 9 mph 56 / 54°F 91% 1009 mb
Low level cloud: 78%
Mid level cloud: 70%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

ENE
ENE

 7 / 8 mph 57 / 56°F 92% 1010 mb
Low level cloud: 84%
Mid level cloud: 87%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

 6 / 7 mph 57 / 55°F 96% 1011 mb
Low level cloud: 64%
Mid level cloud: 72%
High level cloud: 33%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 6 / 7 mph 54 / 52°F 98% 1014 mb
Low level cloud: 84%
Mid level cloud: 80%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 07
May		00:00

NNE
NNE

 7 / 10 mph 51 / 49°F 98% 1015 mb
Low level cloud: 96%
Mid level cloud: 100%
High level cloud: 22%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 7 / 11 mph 50 / 47°F 95% 1016 mb
Low level cloud: 74%
Mid level cloud: 90%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

 7 / 11 mph 50 / 46°F 92% 1019 mb
Low level cloud: 0%
Mid level cloud: 85%
High level cloud: 9%
Most Significant Cloud Type: medium
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 9 / 10 mph 57 / 54°F 74% 1020 mb
Low level cloud: 3%
Mid level cloud: 6%
High level cloud: 1%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 8 / 9 mph 64 / 62°F 67% 1021 mb
Low level cloud: 69%
Mid level cloud: 6%
High level cloud: 8%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

 9 / 11 mph 63 / 62°F 70% 1022 mb
Low level cloud: 23%
Mid level cloud: 24%
High level cloud: 27%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

 7 / 9 mph 62 / 60°F 83% 1023 mb
Low level cloud: 21%
Mid level cloud: 26%
High level cloud: 93%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 7 / 11 mph 52 / 49°F 92% 1025 mb
Low level cloud: 4%
Mid level cloud: 30%
High level cloud: 14%
Most Significant Cloud Type: medium
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 08
May		00:00

NNE
NNE

 7 / 11 mph 48 / 45°F 90% 1027 mb
Low level cloud: 13%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: medium
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

 7 / 11 mph 45 / 42°F 94% 1028 mb
Low level cloud: 33%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 9 / 14 mph 46 / 41°F 93% 1029 mb
Low level cloud: 60%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 11 / 13 mph 53 / 50°F 79% 1030 mb
Low level cloud: 93%
Mid level cloud: 46%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 10 / 12 mph 55 / 52°F 74% 1030 mb
Low level cloud: 92%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 9 / 13 mph 56 / 54°F 72% 1030 mb
Low level cloud: 95%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

 7 / 10 mph 57 / 54°F 80% 1030 mb
Low level cloud: 68%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 7 / 12 mph 49 / 46°F 92% 1031 mb
Low level cloud: 16%
Mid level cloud: 4%
High level cloud: 9%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 09
May		00:00

NE
NE

 5 / 8 mph 47 / 45°F 92% 1031 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
03:00

NNE
NNE

 5 / 9 mph 43 / 40°F 89% 1031 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 32%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 5 / 8 mph 44 / 41°F 82% 1031 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 6 / 7 mph 52 / 49°F 64% 1030 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 100%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 5 / 6 mph 59 / 57°F 55% 1029 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 4 / 5 mph 63 / 60°F 56% 1028 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 6%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

 4 / 5 mph 62 / 60°F 72% 1027 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 8%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

 2 / 5 mph 50 / 51°F 78% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 10
May		00:00

SSW
SSW

 1 / 3 mph 49 / 49°F 84% 1027 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 59%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

 2 / 4 mph 48 / 49°F 83% 1025 mb
Low level cloud: 3%
Mid level cloud: 11%
High level cloud: 17%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

 2 / 4 mph 52 / 51°F 81% 1025 mb
Low level cloud: 14%
Mid level cloud: 14%
High level cloud: 32%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

 4 / 5 mph 62 / 60°F 73% 1024 mb
Low level cloud: 6%
Mid level cloud: 15%
High level cloud: 21%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

 6 / 8 mph 66 / 64°F 66% 1023 mb
Low level cloud: 60%
Mid level cloud: 21%
High level cloud: 100%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNW
NNW

 8 / 10 mph 66 / 64°F 69% 1022 mb
Low level cloud: 40%
Mid level cloud: 50%
High level cloud: 100%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

 4 / 6 mph 66 / 63°F 82% 1021 mb
Low level cloud: 22%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNW
NNW

 5 / 8 mph 58 / 58°F 95% 1021 mb
Low level cloud: 62%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 11
May		00:00

ESE
ESE

 6 / 12 mph 53 / 52°F 89% 1018 mb
Low level cloud: 7%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
67%
0.0 In
06:00

SSW
SSW

 4 / 8 mph 61 / 62°F 87% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

ESE
ESE

 5 / 11 mph 69 / 69°F 63% 1018 mb
Low level cloud: 6%
Mid level cloud: 9%
High level cloud: 36%
Most Significant Cloud Type: low
13%
0.0 In
18:00

ESE
ESE

 8 / 16 mph 65 / 65°F 74% 1022 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
Sun 12
May		00:00

SE
SE

 6 / 10 mph 55 / 54°F 90% 1022 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 34%
Most Significant Cloud Type: medium
7%
0.0 In
06:00

SE
SE

 4 / 7 mph 57 / 57°F 89% 1021 mb
Low level cloud: 51%
Mid level cloud: 53%
High level cloud: 12%
Most Significant Cloud Type: low
71%
0.0 In
12:00

ENE
ENE

 12 / 23 mph 54 / 50°F 72% 1027 mb
Low level cloud: 92%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
91%
0.0 In
18:00

NNE
NNE

 8 / 16 mph 60 / 60°F 70% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
0.0 In
Mon 13
May		00:00

ENE
ENE

 6 / 12 mph 47 / 44°F 92% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

NNE
NNE

 5 / 9 mph 48 / 46°F 79% 1026 mb
Low level cloud: 1%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
12:00

ENE
ENE

 4 / 9 mph 65 / 65°F 53% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

NNE
NNE

 9 / 17 mph 57 / 55°F 72% 1022 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 89%
Most Significant Cloud Type: medium
4%
0.0 In
Tue 14
May		00:00

SW
SW

 5 / 10 mph 54 / 53°F 69% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: high
17%
0.0 In
06:00

NNE
NNE

 6 / 12 mph 46 / 43°F 76% 1020 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
12:00

W
W

 9 / 17 mph 65 / 65°F 68% 1017 mb
Low level cloud: 73%
Mid level cloud: 31%
High level cloud: 3%
Most Significant Cloud Type: low
83%
0.0 In
18:00

NE
NE

 11 / 23 mph 53 / 50°F 82% 1016 mb
Low level cloud: 36%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
37%
0.0 In
Wed 15
May		00:00

WNW
WNW

 4 / 9 mph 55 / 54°F 89% 1015 mb
Low level cloud: 51%
Mid level cloud: 45%
High level cloud: 2%
Most Significant Cloud Type: low
66%
0.0 In
06:00

NE
NE

 10 / 19 mph 46 / 41°F 94% 1014 mb
Low level cloud: 38%
Mid level cloud: 4%
High level cloud: 1%
Most Significant Cloud Type: low
40%
0.0 In
12:00

W
W

 8 / 16 mph 59 / 59°F 85% 1013 mb
Low level cloud: 84%
Mid level cloud: 45%
High level cloud: 30%
Most Significant Cloud Type: low
100%
0.0 In
18:00

ENE
ENE

 14 / 28 mph 55 / 51°F 73% 1012 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 1%
Most Significant Cloud Type: medium
2%
0.0 In
Thu 16
May		00:00

NNW
NNW

 4 / 9 mph 56 / 56°F 94% 1009 mb
Low level cloud: 97%
Mid level cloud: 32%
High level cloud: 5%
Most Significant Cloud Type: low
100%
0.1 In
06:00

NE
NE

 11 / 23 mph 45 / 40°F 91% 1012 mb
Low level cloud: 33%
Mid level cloud: 2%
High level cloud: 1%
Most Significant Cloud Type: low
33%
0.0 In
12:00

WNW
WNW

 12 / 24 mph 56 / 53°F 81% 1007 mb
Low level cloud: 48%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
64%
0.1 In
18:00

NE
NE

 13 / 25 mph 57 / 54°F 81% 1011 mb
Low level cloud: 23%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
Fri 17
May		00:00

WNW
WNW

 8 / 17 mph 45 / 40°F 82% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

NNE
NNE

 13 / 26 mph 50 / 45°F 94% 1013 mb
Low level cloud: 75%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
80%
0.0 In
12:00

NW
NW

 11 / 23 mph 52 / 49°F 65% 1017 mb
Low level cloud: 82%
Mid level cloud: 7%
High level cloud: 21%
Most Significant Cloud Type: low
86%
0.0 In
18:00

NE
NE

 12 / 24 mph 55 / 52°F 80% 1017 mb
Low level cloud: 31%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
32%
0.0 In
Sat 18
May		00:00

NNW
NNW

 1 / 3 mph 49 / 49°F 84% 1020 mb
Low level cloud: 20%
Mid level cloud: 0%
High level cloud: 69%
Most Significant Cloud Type: low
27%
0.0 In
06:00

NNE
NNE

 8 / 16 mph 47 / 44°F 92% 1022 mb
Low level cloud: 26%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
38%
0.0 In
12:00

WNW
WNW

 3 / 6 mph 64 / 64°F 52% 1020 mb
Low level cloud: 37%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: low
38%
0.0 In
18:00

N
N

 7 / 15 mph 59 / 59°F 75% 1023 mb
Low level cloud: 10%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: medium
56%
0.0 In
Sun 19
May		00:00

SSE
SSE

 4 / 8 mph 57 / 57°F 89% 1021 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 1%
Most Significant Cloud Type: high
1%
0.0 In
06:00

WSW
WSW

 2 / 4 mph 57 / 58°F 84% 1024 mb
Low level cloud: 10%
Mid level cloud: 0%
High level cloud: 55%
Most Significant Cloud Type: low
16%
0.0 In
12:00

ESE
ESE

 8 / 17 mph 65 / 65°F 59% 1020 mb
Low level cloud: 5%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: low
6%
0.0 In
18:00

NNW
NNW

 5 / 11 mph 64 / 64°F 78% 1020 mb
Low level cloud: 13%
Mid level cloud: 23%
High level cloud: 78%
Most Significant Cloud Type: low
30%
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