WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Ochtermuthill 14 Day Long Range Forecast

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

Perth and Kinross, United Kingdom

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

Reviewing the forecast for Ochtermuthill Over the next 14 days and the average daytime maximum temperature will be around 17°C, with a high for the two weeks of 23°C expected on the afternoon of Saturday 18th. The average minimum temperature will be 7°C, dipping to its lowest on the morning of Saturday 25th at 2°C. The next 14 days will have some days seeing a little precipitation and some days with rain. The indicators are that Wednesday 22nd will have the most precipitation with an accumulation of around 20.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 17
May
18:00

ENE
ENE

5 / 6 mph 67 / 64°F 76% 1014 mb
Low level cloud: 2%
Mid level cloud: 10%
High level cloud: 9%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

2 / 5 mph 53 / 52°F 94% 1016 mb
Low level cloud: 5%
Mid level cloud: 10%
High level cloud: 4%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May
00:00

N
N

2 / 5 mph 49 / 49°F 93% 1016 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 12%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

2 / 4 mph 47 / 47°F 92% 1016 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NE
NE

1 / 1 mph 56 / 55°F 84% 1017 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 4%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

2 / 2 mph 69 / 67°F 64% 1017 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 6%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

5 / 6 mph 73 / 76°F 55% 1017 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 17%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

5 / 6 mph 73 / 70°F 61% 1017 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 32%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

6 / 8 mph 66 / 63°F 81% 1017 mb
Low level cloud: 6%
Mid level cloud: 30%
High level cloud: 22%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

4 / 6 mph 54 / 54°F 96% 1018 mb
Low level cloud: 27%
Mid level cloud: 77%
High level cloud: 7%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May
00:00

ESE
ESE

3 / 4 mph 52 / 52°F 95% 1019 mb
Low level cloud: 60%
Mid level cloud: 44%
High level cloud: 14%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

1 / 2 mph 49 / 49°F 96% 1019 mb
Low level cloud: 43%
Mid level cloud: 27%
High level cloud: 14%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

2 / 2 mph 54 / 54°F 94% 1019 mb
Low level cloud: 60%
Mid level cloud: 46%
High level cloud: 22%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

3 / 4 mph 59 / 60°F 84% 1019 mb
Low level cloud: 68%
Mid level cloud: 68%
High level cloud: 55%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

4 / 5 mph 62 / 62°F 78% 1019 mb
Low level cloud: 86%
Mid level cloud: 44%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

5 / 6 mph 60 / 60°F 85% 1019 mb
Low level cloud: 86%
Mid level cloud: 43%
High level cloud: 82%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

5 / 5 mph 57 / 57°F 88% 1019 mb
Low level cloud: 87%
Mid level cloud: 47%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

4 / 4 mph 53 / 52°F 90% 1019 mb
Low level cloud: 74%
Mid level cloud: 52%
High level cloud: 32%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
00:00

ENE
ENE

3 / 3 mph 51 / 51°F 88% 1019 mb
Low level cloud: 41%
Mid level cloud: 45%
High level cloud: 33%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

2 / 3 mph 50 / 50°F 86% 1019 mb
Low level cloud: 18%
Mid level cloud: 46%
High level cloud: 47%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

2 / 3 mph 52 / 51°F 86% 1018 mb
Low level cloud: 18%
Mid level cloud: 43%
High level cloud: 37%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

3 / 4 mph 57 / 55°F 80% 1018 mb
Low level cloud: 41%
Mid level cloud: 43%
High level cloud: 98%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

4 / 5 mph 63 / 62°F 70% 1016 mb
Low level cloud: 72%
Mid level cloud: 41%
High level cloud: 93%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

4 / 5 mph 63 / 62°F 73% 1015 mb
Low level cloud: 69%
Mid level cloud: 54%
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

ESE
ESE

5 / 6 mph 60 / 60°F 79% 1014 mb
Low level cloud: 75%
Mid level cloud: 95%
High level cloud: 73%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

4 / 7 mph 50 / 48°F 94% 1015 mb
Low level cloud: 41%
Mid level cloud: 44%
High level cloud: 84%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
00:00

ENE
ENE

2 / 4 mph 44 / 45°F 94% 1014 mb
Low level cloud: 12%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

2 / 4 mph 42 / 42°F 95% 1013 mb
Low level cloud: 10%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NE
NE

1 / 2 mph 50 / 49°F 87% 1012 mb
Low level cloud: 5%
Mid level cloud: 2%
High level cloud: 15%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

3 / 3 mph 62 / 60°F 57% 1010 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 97%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

4 / 4 mph 67 / 64°F 45% 1009 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 40%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

4 / 5 mph 67 / 64°F 51% 1008 mb
Low level cloud: 0%
Mid level cloud: 52%
High level cloud: 45%
Most Significant Cloud Type: medium
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

3 / 4 mph 65 / 62°F 64% 1008 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 49%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

2 / 5 mph 52 / 51°F 79% 1009 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 21%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May
00:00

W
W

3 / 6 mph 49 / 49°F 88% 1010 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 3%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

4 / 9 mph 48 / 46°F 92% 1010 mb
Low level cloud: 8%
Mid level cloud: 19%
High level cloud: 16%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

2 / 2 mph 55 / 54°F 89% 1011 mb
Low level cloud: 52%
Mid level cloud: 23%
High level cloud: 97%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

2 / 3 mph 60 / 59°F 79% 1012 mb
Low level cloud: 73%
Mid level cloud: 28%
High level cloud: 100%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

4 / 5 mph 61 / 60°F 80% 1013 mb
Low level cloud: 81%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

3 / 5 mph 57 / 58°F 91% 1013 mb
Low level cloud: 95%
Mid level cloud: 81%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

N
N

3 / 4 mph 53 / 53°F 97% 1015 mb
Low level cloud: 96%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
21:00

NNW
NNW

6 / 9 mph 50 / 47°F 94% 1017 mb
Low level cloud: 64%
Mid level cloud: 85%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
Thu 23
May
00:00

NNW
NNW

6 / 9 mph 46 / 43°F 91% 1017 mb
Low level cloud: 40%
Mid level cloud: 75%
High level cloud: 100%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

7 / 12 mph 45 / 40°F 88% 1016 mb
Low level cloud: 9%
Mid level cloud: 68%
High level cloud: 100%
Most Significant Cloud Type: medium
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

8 / 12 mph 44 / 39°F 88% 1017 mb
Low level cloud: 7%
Mid level cloud: 74%
High level cloud: 100%
Most Significant Cloud Type: medium
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

11 / 12 mph 47 / 41°F 87% 1015 mb
Low level cloud: 26%
Mid level cloud: 70%
High level cloud: 40%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

12 / 14 mph 49 / 44°F 92% 1014 mb
Low level cloud: 68%
Mid level cloud: 90%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
15:00

NNW
NNW

13 / 15 mph 51 / 46°F 86% 1011 mb
Low level cloud: 97%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

10 / 12 mph 49 / 45°F 90% 1010 mb
Low level cloud: 88%
Mid level cloud: 95%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

7 / 8 mph 47 / 44°F 94% 1010 mb
Low level cloud: 97%
Mid level cloud: 100%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 24
May
00:00

W
W

5 / 11 mph 36 / 31°F 89% 1011 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
06:00

W
W

5 / 10 mph 46 / 44°F 86% 1010 mb
Low level cloud: 9%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
13%
0.0 In
12:00

E
E

12 / 21 mph 57 / 54°F 69% 1024 mb
Low level cloud: 70%
Mid level cloud: 1%
High level cloud: 47%
Most Significant Cloud Type: low
75%
0.0 In
18:00

E
E

6 / 12 mph 64 / 64°F 68% 1023 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
Sat 25
May
00:00

NE
NE

4 / 8 mph 44 / 42°F 97% 1028 mb
Low level cloud: 37%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SSW
SSW

5 / 10 mph 52 / 51°F 84% 1021 mb
Low level cloud: 26%
Mid level cloud: 21%
High level cloud: 100%
Most Significant Cloud Type: low
45%
0.0 In
12:00

SW
SW

13 / 25 mph 55 / 51°F 82% 1015 mb
Low level cloud: 67%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
83%
0.0 In
18:00

S
S

8 / 17 mph 63 / 63°F 74% 1017 mb
Low level cloud: 10%
Mid level cloud: 13%
High level cloud: 33%
Most Significant Cloud Type: low
18%
0.0 In
Sun 26
May
00:00

NE
NE

5 / 11 mph 50 / 48°F 98% 1017 mb
Low level cloud: 92%
Mid level cloud: 49%
High level cloud: 56%
Most Significant Cloud Type: low
100%
0.0 In
06:00

E
E

3 / 7 mph 52 / 52°F 86% 1017 mb
Low level cloud: 7%
Mid level cloud: 44%
High level cloud: 83%
Most Significant Cloud Type: medium
67%
0.0 In
12:00

ENE
ENE

6 / 13 mph 57 / 56°F 86% 1019 mb
Low level cloud: 97%
Mid level cloud: 49%
High level cloud: 21%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SSW
SSW

0 / 0 mph 53 / 53°F 96% 1013 mb
Low level cloud: 96%
Mid level cloud: 100%
High level cloud: 15%
Most Significant Cloud Type: low
100%
0.2 In
Mon 27
May
00:00

N
N

2 / 4 mph 47 / 47°F 94% 1020 mb
Low level cloud: 2%
Mid level cloud: 5%
High level cloud: 5%
Most Significant Cloud Type: low
4%
0.0 In
06:00

WSW
WSW

2 / 4 mph 51 / 51°F 95% 1011 mb
Low level cloud: 72%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
87%
0.5 In
12:00

SSE
SSE

4 / 9 mph 68 / 68°F 55% 1017 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 6%
Most Significant Cloud Type: medium
15%
0.0 In
18:00

WNW
WNW

9 / 20 mph 52 / 48°F 78% 1014 mb
Low level cloud: 41%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
55%
0.1 In
Tue 28
May
00:00

WSW
WSW

4 / 8 mph 50 / 49°F 90% 1013 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
49%
0.0 In
06:00

WNW
WNW

4 / 8 mph 47 / 46°F 78% 1020 mb
Low level cloud: 17%
Mid level cloud: 56%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

SW
SW

10 / 21 mph 59 / 59°F 74% 1008 mb
Low level cloud: 35%
Mid level cloud: 46%
High level cloud: 11%
Most Significant Cloud Type: low
52%
0.0 In
18:00

SW
SW

4 / 9 mph 55 / 55°F 70% 1021 mb
Low level cloud: 16%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
27%
0.0 In
Wed 29
May
00:00

WSW
WSW

6 / 13 mph 37 / 32°F 93% 1007 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

S
S

3 / 7 mph 46 / 44°F 87% 1019 mb
Low level cloud: 89%
Mid level cloud: 39%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SW
SW

10 / 22 mph 53 / 50°F 70% 1005 mb
Low level cloud: 86%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

S
S

4 / 8 mph 48 / 47°F 97% 1015 mb
Low level cloud: 94%
Mid level cloud: 66%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.1 In
Thu 30
May
00:00

SW
SW

5 / 10 mph 38 / 34°F 96% 1005 mb
Low level cloud: 17%
Mid level cloud: 29%
High level cloud: 12%
Most Significant Cloud Type: low
29%
0.0 In
06:00

WSW
WSW

4 / 9 mph 46 / 44°F 88% 1014 mb
Low level cloud: 15%
Mid level cloud: 30%
High level cloud: 6%
Most Significant Cloud Type: low
25%
0.0 In
12:00

SW
SW

11 / 24 mph 55 / 52°F 59% 1004 mb
Low level cloud: 41%
Mid level cloud: 47%
High level cloud: 22%
Most Significant Cloud Type: low
60%
0.0 In
18:00

WSW
WSW

10 / 20 mph 52 / 49°F 75% 1014 mb
Low level cloud: 20%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.0 In
Fri 31
May
00:00

W
W

4 / 9 mph 36 / 33°F 89% 1007 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 15%
Most Significant Cloud Type: medium
30%
0.0 In
06:00

SSW
SSW

6 / 12 mph 44 / 41°F 93% 1014 mb
Low level cloud: 84%
Mid level cloud: 45%
High level cloud: 17%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SW
SW

4 / 9 mph 58 / 58°F 59% 1008 mb
Low level cloud: 19%
Mid level cloud: 51%
High level cloud: 36%
Most Significant Cloud Type: low
40%
0.0 In
18:00

SW
SW

13 / 26 mph 50 / 46°F 97% 1008 mb
Low level cloud: 100%
Mid level cloud: 59%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
Sat 01
Jun
00:00

WNW
WNW

4 / 9 mph 38 / 34°F 90% 1013 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.2 In
06:00

WSW
WSW

14 / 30 mph 47 / 41°F 88% 1011 mb
Low level cloud: 87%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSE
SSE

2 / 5 mph 60 / 60°F 62% 1018 mb
Low level cloud: 4%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
0.0 In
18:00

WSW
WSW

13 / 26 mph 54 / 50°F 75% 1015 mb
Low level cloud: 43%
Mid level cloud: 1%
High level cloud: 90%
Most Significant Cloud Type: low
53%
0.0 In

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