WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Yelland 14 Day Long Range Forecast

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

Devon, United Kingdom

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

The forecast for Yelland in the coming two weeks is predicting the average daytime maximum temperature will be around 17°C, with a high for the two weeks of 20°C expected on the afternoon of Monday 20th. The mean minimum temperature will be 10°C, dipping to its lowest on the morning of Friday 24th at 6°C. The next 14 days will have some days seeing a little precipitation and some days with rain. The current forecast indicates Sunday 26th will have the most precipitation with an accumulation of around 7.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 19
May
18:00

NNE
NNE

7 / 8 mph 67 / 65°F 82% 1014 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
21:00

ENE
ENE

5 / 11 mph 58 / 56°F 87% 1015 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
Mon 20
May
00:00

E
E

8 / 16 mph 52 / 50°F 91% 1015 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

E
E

9 / 19 mph 48 / 44°F 88% 1015 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

9 / 18 mph 50 / 45°F 85% 1015 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
09:00

E
E

11 / 13 mph 62 / 61°F 73% 1015 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

E
E

11 / 13 mph 67 / 65°F 70% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 16%
Most Significant Cloud Type: high
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

8 / 9 mph 69 / 67°F 68% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

6 / 7 mph 69 / 66°F 79% 1012 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
21:00

NE
NE

5 / 9 mph 56 / 54°F 85% 1013 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
Tue 21
May
00:00

ENE
ENE

4 / 9 mph 50 / 49°F 86% 1012 mb
Low level cloud: 18%
Mid level cloud: 4%
High level cloud: 7%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

6 / 12 mph 49 / 46°F 89% 1011 mb
Low level cloud: 12%
Mid level cloud: 21%
High level cloud: 5%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

5 / 9 mph 52 / 49°F 85% 1011 mb
Low level cloud: 1%
Mid level cloud: 11%
High level cloud: 3%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

6 / 7 mph 64 / 61°F 73% 1011 mb
Low level cloud: 14%
Mid level cloud: 8%
High level cloud: 8%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

N
N

6 / 6 mph 66 / 64°F 73% 1010 mb
Low level cloud: 12%
Mid level cloud: 13%
High level cloud: 16%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

8 / 9 mph 65 / 63°F 78% 1010 mb
Low level cloud: 3%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

6 / 7 mph 61 / 61°F 88% 1010 mb
Low level cloud: 8%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

6 / 10 mph 53 / 51°F 94% 1010 mb
Low level cloud: 30%
Mid level cloud: 98%
High level cloud: 86%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May
00:00

W
W

6 / 11 mph 54 / 52°F 90% 1010 mb
Low level cloud: 28%
Mid level cloud: 100%
High level cloud: 22%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

6 / 11 mph 52 / 50°F 86% 1010 mb
Low level cloud: 71%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

8 / 15 mph 53 / 48°F 92% 1010 mb
Low level cloud: 26%
Mid level cloud: 30%
High level cloud: 16%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

11 / 19 mph 54 / 50°F 89% 1010 mb
Low level cloud: 67%
Mid level cloud: 45%
High level cloud: 4%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WNW
WNW

12 / 15 mph 57 / 54°F 95% 1011 mb
Low level cloud: 97%
Mid level cloud: 67%
High level cloud: 3%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

13 / 16 mph 58 / 56°F 87% 1012 mb
Low level cloud: 21%
Mid level cloud: 68%
High level cloud: 13%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

11 / 13 mph 57 / 54°F 90% 1014 mb
Low level cloud: 73%
Mid level cloud: 32%
High level cloud: 34%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

7 / 9 mph 56 / 53°F 93% 1015 mb
Low level cloud: 42%
Mid level cloud: 20%
High level cloud: 4%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May
00:00

WNW
WNW

3 / 4 mph 54 / 54°F 90% 1016 mb
Low level cloud: 83%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

8 / 11 mph 53 / 51°F 90% 1016 mb
Low level cloud: 94%
Mid level cloud: 20%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

9 / 11 mph 53 / 49°F 86% 1018 mb
Low level cloud: 74%
Mid level cloud: 29%
High level cloud: 1%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNW
NNW

10 / 11 mph 55 / 51°F 81% 1018 mb
Low level cloud: 44%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

9 / 11 mph 56 / 52°F 76% 1018 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

11 / 13 mph 55 / 51°F 76% 1019 mb
Low level cloud: 7%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

9 / 10 mph 54 / 51°F 76% 1019 mb
Low level cloud: 4%
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
21:00

W
W

6 / 8 mph 52 / 48°F 81% 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
Fri 24
May
00:00

SW
SW

4 / 8 mph 47 / 45°F 80% 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
03:00

S
S

5 / 11 mph 44 / 41°F 83% 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
06:00

S
S

6 / 11 mph 47 / 43°F 83% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 59%
Most Significant Cloud Type: high
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

5 / 5 mph 57 / 55°F 71% 1020 mb
Low level cloud: 5%
Mid level cloud: 20%
High level cloud: 97%
Most Significant Cloud Type: medium
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

5 / 5 mph 59 / 59°F 66% 1020 mb
Low level cloud: 14%
Mid level cloud: 56%
High level cloud: 100%
Most Significant Cloud Type: medium
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

4 / 5 mph 61 / 59°F 68% 1019 mb
Low level cloud: 31%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

1 / 1 mph 59 / 58°F 74% 1019 mb
Low level cloud: 53%
Mid level cloud: 72%
High level cloud: 33%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

6 / 9 mph 55 / 51°F 81% 1019 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 25
May
00:00

SE
SE

8 / 16 mph 48 / 44°F 78% 1018 mb
Low level cloud: 0%
Mid level cloud: 37%
High level cloud: 100%
Most Significant Cloud Type: medium
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

9 / 18 mph 47 / 43°F 84% 1017 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

11 / 19 mph 52 / 48°F 89% 1015 mb
Low level cloud: 15%
Mid level cloud: 84%
High level cloud: 6%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

15 / 17 mph 62 / 61°F 87% 1014 mb
Low level cloud: 10%
Mid level cloud: 95%
High level cloud: 7%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

15 / 17 mph 65 / 65°F 73% 1012 mb
Low level cloud: 0%
Mid level cloud: 98%
High level cloud: 0%
Most Significant Cloud Type: medium
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

17 / 19 mph 63 / 63°F 87% 1011 mb
Low level cloud: 2%
Mid level cloud: 87%
High level cloud: 100%
Most Significant Cloud Type: medium
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

15 / 17 mph 61 / 61°F 93% 1009 mb
Low level cloud: 64%
Mid level cloud: 93%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

SSE
SSE

21 / 24 mph 61 / 59°F 87% 1009 mb
Low level cloud: 31%
Mid level cloud: 56%
High level cloud: 100%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 26
May
00:00

SE
SE

9 / 18 mph 55 / 53°F 88% 1012 mb
Low level cloud: 65%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: low
82%
0.0 In
06:00

ESE
ESE

9 / 18 mph 52 / 49°F 90% 1017 mb
Low level cloud: 27%
Mid level cloud: 84%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

W
W

11 / 23 mph 56 / 54°F 76% 1008 mb
Low level cloud: 0%
Mid level cloud: 94%
High level cloud: 10%
Most Significant Cloud Type: medium
94%
0.0 In
18:00

WSW
WSW

9 / 18 mph 58 / 56°F 96% 1010 mb
Low level cloud: 57%
Mid level cloud: 79%
High level cloud: 74%
Most Significant Cloud Type: low
93%
0.0 In
Mon 27
May
00:00

SSW
SSW

11 / 22 mph 49 / 45°F 94% 1016 mb
Low level cloud: 30%
Mid level cloud: 13%
High level cloud: 13%
Most Significant Cloud Type: low
36%
0.0 In
06:00

ENE
ENE

14 / 26 mph 55 / 51°F 95% 1018 mb
Low level cloud: 82%
Mid level cloud: 1%
High level cloud: 24%
Most Significant Cloud Type: low
84%
0.0 In
12:00

NNW
NNW

6 / 12 mph 59 / 58°F 73% 1018 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 16%
Most Significant Cloud Type: medium
7%
0.0 In
18:00

WNW
WNW

15 / 28 mph 56 / 53°F 84% 1019 mb
Low level cloud: 31%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
36%
0.0 In
Tue 28
May
00:00

W
W

6 / 13 mph 53 / 52°F 92% 1009 mb
Low level cloud: 13%
Mid level cloud: 19%
High level cloud: 33%
Most Significant Cloud Type: low
23%
0.0 In
06:00

NNW
NNW

3 / 6 mph 54 / 55°F 86% 1019 mb
Low level cloud: 5%
Mid level cloud: 7%
High level cloud: 8%
Most Significant Cloud Type: low
8%
0.0 In
12:00

WNW
WNW

9 / 17 mph 57 / 56°F 79% 1010 mb
Low level cloud: 1%
Mid level cloud: 8%
High level cloud: 16%
Most Significant Cloud Type: medium
10%
0.0 In
18:00

NW
NW

5 / 10 mph 60 / 60°F 78% 1018 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: medium
4%
0.0 In
Wed 29
May
00:00

W
W

7 / 15 mph 55 / 53°F 96% 1010 mb
Low level cloud: 55%
Mid level cloud: 14%
High level cloud: 2%
Most Significant Cloud Type: low
59%
0.0 In
06:00

E
E

7 / 14 mph 52 / 50°F 90% 1016 mb
Low level cloud: 6%
Mid level cloud: 8%
High level cloud: 4%
Most Significant Cloud Type: low
9%
0.0 In
12:00

W
W

7 / 15 mph 59 / 59°F 83% 1011 mb
Low level cloud: 4%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
33%
0.0 In
18:00

ESE
ESE

7 / 14 mph 63 / 64°F 83% 1013 mb
Low level cloud: 4%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
16%
0.0 In
Thu 30
May
00:00

WSW
WSW

4 / 8 mph 55 / 55°F 92% 1014 mb
Low level cloud: 33%
Mid level cloud: 16%
High level cloud: 86%
Most Significant Cloud Type: low
48%
0.0 In
06:00

E
E

12 / 23 mph 55 / 52°F 92% 1012 mb
Low level cloud: 17%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
44%
0.0 In
12:00

W
W

7 / 15 mph 58 / 57°F 79% 1018 mb
Low level cloud: 8%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
72%
0.0 In
18:00

ESE
ESE

6 / 13 mph 62 / 62°F 86% 1009 mb
Low level cloud: 0%
Mid level cloud: 52%
High level cloud: 64%
Most Significant Cloud Type: medium
54%
0.0 In
Fri 31
May
00:00

SSE
SSE

8 / 17 mph 56 / 54°F 87% 1018 mb
Low level cloud: 0%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
06:00

WSW
WSW

6 / 12 mph 54 / 53°F 98% 1007 mb
Low level cloud: 72%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.4 In
12:00

S
S

15 / 32 mph 64 / 64°F 75% 1017 mb
Low level cloud: 5%
Mid level cloud: 49%
High level cloud: 46%
Most Significant Cloud Type: medium
64%
0.0 In
18:00

W
W

2 / 5 mph 62 / 62°F 84% 1010 mb
Low level cloud: 11%
Mid level cloud: 10%
High level cloud: 5%
Most Significant Cloud Type: low
15%
0.4 In
Sat 01
Jun
00:00

SSE
SSE

9 / 19 mph 51 / 48°F 90% 1015 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
06:00

E
E

1 / 3 mph 55 / 55°F 92% 1010 mb
Low level cloud: 99%
Mid level cloud: 83%
High level cloud: 5%
Most Significant Cloud Type: low
100%
0.1 In
12:00

SSW
SSW

15 / 31 mph 67 / 67°F 78% 1012 mb
Low level cloud: 77%
Mid level cloud: 14%
High level cloud: 97%
Most Significant Cloud Type: low
93%
0.0 In
18:00

N
N

1 / 2 mph 64 / 64°F 82% 1010 mb
Low level cloud: 8%
Mid level cloud: 12%
High level cloud: 13%
Most Significant Cloud Type: low
14%
0.1 In
Sun 02
Jun
00:00

SW
SW

10 / 21 mph 54 / 51°F 93% 1014 mb
Low level cloud: 29%
Mid level cloud: 88%
High level cloud: 20%
Most Significant Cloud Type: medium
100%
0.0 In
06:00

S
S

4 / 9 mph 54 / 53°F 90% 1010 mb
Low level cloud: 9%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
17%
0.0 In
12:00

WSW
WSW

18 / 37 mph 57 / 54°F 76% 1014 mb
Low level cloud: 4%
Mid level cloud: 1%
High level cloud: 9%
Most Significant Cloud Type: low
5%
0.0 In
18:00

WSW
WSW

7 / 15 mph 59 / 59°F 84% 1010 mb
Low level cloud: 17%
Mid level cloud: 31%
High level cloud: 85%
Most Significant Cloud Type: low
38%
0.1 In
Mon 03
Jun
00:00

SW
SW

11 / 24 mph 50 / 46°F 92% 1013 mb
Low level cloud: 26%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.0 In
06:00

SSE
SSE

7 / 15 mph 52 / 49°F 90% 1010 mb
Low level cloud: 7%
Mid level cloud: 18%
High level cloud: 64%
Most Significant Cloud Type: medium
39%
0.0 In
12:00

WSW
WSW

25 / 52 mph 58 / 53°F 90% 1010 mb
Low level cloud: 60%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
63%
0.1 In
18:00

S
S

11 / 23 mph 56 / 53°F 85% 1010 mb
Low level cloud: 49%
Mid level cloud: 76%
High level cloud: 14%
Most Significant Cloud Type: low
77%
0.1 In

Other Locations Near to Yelland

The day label given represents the local day relative to the local time for the location you are looking at.
(More Info)

Day

This time is corrected for local time zones and where possible for daylight saving times.
(More Info)

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.
(More Info)

Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
(More Info)

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.
(More Info)

Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
(More Info)

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.
(More Info)

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.
(More Info)

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.
(More Info)

Pressure