WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Thomshill 14 Day Long Range Forecast

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

Moray, United Kingdom

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

Over the next 14 days the Thomshill forecast suggests the average daytime maximum temperature will be around 16°C, with a high for the two weeks of 19°C expected on the afternoon of Tuesday 21st. The average minimum temperature will be 9°C, dipping to its lowest on the morning of Tuesday 21st at 7°C. The coming 14 days will have some days seeing a little precipitation and some days with rain. Current predictions suggest Wednesday 22nd will have the most precipitation with an accumulation of around 23.0mm. On the whole winds are likely to be moderate.

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

E
E

9 / 10 mph 57 / 54°F 87% 1019 mb
Low level cloud: 92%
Mid level cloud: 8%
High level cloud: 3%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

8 / 12 mph 55 / 52°F 91% 1019 mb
Low level cloud: 77%
Mid level cloud: 10%
High level cloud: 7%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
00:00

E
E

8 / 14 mph 51 / 48°F 92% 1019 mb
Low level cloud: 14%
Mid level cloud: 9%
High level cloud: 12%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

7 / 16 mph 47 / 44°F 94% 1018 mb
Low level cloud: 16%
Mid level cloud: 10%
High level cloud: 4%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

6 / 9 mph 53 / 49°F 89% 1018 mb
Low level cloud: 20%
Mid level cloud: 10%
High level cloud: 2%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

5 / 6 mph 62 / 60°F 77% 1017 mb
Low level cloud: 8%
Mid level cloud: 11%
High level cloud: 3%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

11 / 13 mph 64 / 63°F 68% 1016 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

14 / 17 mph 65 / 64°F 62% 1015 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 1%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

14 / 20 mph 61 / 60°F 68% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 7%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

10 / 20 mph 48 / 43°F 83% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 3%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
00:00

ESE
ESE

5 / 11 mph 45 / 42°F 85% 1015 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
03:00

SSE
SSE

2 / 5 mph 45 / 44°F 88% 1014 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

SSE
SSE

2 / 2 mph 50 / 49°F 83% 1014 mb
Low level cloud: 1%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

5 / 5 mph 64 / 61°F 62% 1013 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
12:00

E
E

9 / 11 mph 65 / 63°F 61% 1012 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 7%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

13 / 15 mph 67 / 65°F 70% 1010 mb
Low level cloud: 3%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: medium
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

12 / 15 mph 63 / 63°F 81% 1010 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 33%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

6 / 14 mph 51 / 48°F 93% 1010 mb
Low level cloud: 5%
Mid level cloud: 92%
High level cloud: 100%
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

S
S

3 / 4 mph 53 / 53°F 96% 1010 mb
Low level cloud: 49%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

2 / 3 mph 52 / 52°F 98% 1010 mb
Low level cloud: 87%
Mid level cloud: 96%
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

WSW
WSW

1 / 2 mph 50 / 50°F 97% 1010 mb
Low level cloud: 90%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

4 / 6 mph 54 / 53°F 98% 1010 mb
Low level cloud: 97%
Mid level cloud: 76%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

NNE
NNE

8 / 9 mph 58 / 56°F 98% 1010 mb
Low level cloud: 100%
Mid level cloud: 95%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

10 / 12 mph 60 / 60°F 98% 1009 mb
Low level cloud: 100%
Mid level cloud: 65%
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

10 / 12 mph 58 / 55°F 99% 1008 mb
Low level cloud: 100%
Mid level cloud: 99%
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

NW
NW

13 / 15 mph 55 / 51°F 98% 1009 mb
Low level cloud: 100%
Mid level cloud: 67%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
Thu 23
May
00:00

WNW
WNW

19 / 28 mph 49 / 43°F 94% 1009 mb
Low level cloud: 99%
Mid level cloud: 90%
High level cloud: 81%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

WNW
WNW

19 / 30 mph 48 / 41°F 92% 1010 mb
Low level cloud: 100%
Mid level cloud: 98%
High level cloud: 18%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

18 / 28 mph 47 / 40°F 91% 1012 mb
Low level cloud: 100%
Mid level cloud: 99%
High level cloud: 6%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

18 / 21 mph 49 / 43°F 90% 1013 mb
Low level cloud: 100%
Mid level cloud: 74%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WNW
WNW

18 / 21 mph 52 / 47°F 87% 1014 mb
Low level cloud: 96%
Mid level cloud: 79%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

18 / 21 mph 53 / 48°F 85% 1015 mb
Low level cloud: 94%
Mid level cloud: 83%
High level cloud: 12%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

17 / 19 mph 52 / 47°F 83% 1015 mb
Low level cloud: 95%
Mid level cloud: 68%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

16 / 18 mph 50 / 45°F 81% 1016 mb
Low level cloud: 91%
Mid level cloud: 57%
High level cloud: 14%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
May
00:00

W
W

11 / 15 mph 48 / 43°F 76% 1015 mb
Low level cloud: 83%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

10 / 14 mph 47 / 43°F 77% 1015 mb
Low level cloud: 53%
Mid level cloud: 42%
High level cloud: 78%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

7 / 9 mph 50 / 46°F 75% 1015 mb
Low level cloud: 20%
Mid level cloud: 33%
High level cloud: 21%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

5 / 6 mph 53 / 50°F 69% 1016 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

2 / 3 mph 56 / 55°F 64% 1016 mb
Low level cloud: 15%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

10 / 12 mph 55 / 51°F 71% 1016 mb
Low level cloud: 8%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

9 / 13 mph 56 / 52°F 78% 1015 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

5 / 10 mph 50 / 47°F 91% 1016 mb
Low level cloud: 43%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 25
May
00:00

WSW
WSW

4 / 8 mph 47 / 45°F 93% 1016 mb
Low level cloud: 15%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

5 / 10 mph 45 / 42°F 90% 1016 mb
Low level cloud: 1%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

4 / 7 mph 48 / 46°F 79% 1016 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
09:00

ESE
ESE

2 / 3 mph 60 / 59°F 60% 1015 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 13%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

3 / 4 mph 64 / 62°F 58% 1014 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 63%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

8 / 11 mph 65 / 62°F 60% 1013 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 69%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

12 / 17 mph 62 / 61°F 67% 1012 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

11 / 20 mph 57 / 53°F 75% 1012 mb
Low level cloud: 4%
Mid level cloud: 51%
High level cloud: 32%
Most Significant Cloud Type: medium
63%
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 49 / 46°F 90% 1017 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 44%
Most Significant Cloud Type: medium
16%
0.0 In
06:00

SSE
SSE

6 / 11 mph 55 / 54°F 85% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 42%
Most Significant Cloud Type: medium
46%
0.0 In
12:00

ESE
ESE

11 / 17 mph 59 / 56°F 66% 1009 mb
Low level cloud: 47%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
75%
0.0 In
18:00

ENE
ENE

8 / 15 mph 58 / 57°F 91% 1016 mb
Low level cloud: 12%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: low
35%
0.0 In
Mon 27
May
00:00

SE
SE

5 / 11 mph 52 / 50°F 91% 1011 mb
Low level cloud: 0%
Mid level cloud: 96%
High level cloud: 32%
Most Significant Cloud Type: medium
98%
0.0 In
06:00

SSE
SSE

1 / 1 mph 56 / 56°F 84% 1026 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
12:00

NE
NE

6 / 10 mph 62 / 62°F 67% 1021 mb
Low level cloud: 2%
Mid level cloud: 19%
High level cloud: 12%
Most Significant Cloud Type: medium
23%
0.0 In
18:00

N
N

2 / 4 mph 57 / 57°F 78% 1017 mb
Low level cloud: 77%
Mid level cloud: 14%
High level cloud: 33%
Most Significant Cloud Type: low
85%
0.0 In
Tue 28
May
00:00

NE
NE

6 / 11 mph 52 / 50°F 92% 1011 mb
Low level cloud: 100%
Mid level cloud: 33%
High level cloud: 4%
Most Significant Cloud Type: low
100%
0.0 In
06:00

W
W

2 / 3 mph 52 / 53°F 87% 1019 mb
Low level cloud: 20%
Mid level cloud: 43%
High level cloud: 33%
Most Significant Cloud Type: low
38%
0.0 In
12:00

NNE
NNE

5 / 9 mph 55 / 55°F 96% 1011 mb
Low level cloud: 93%
Mid level cloud: 48%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
18:00

ENE
ENE

3 / 5 mph 57 / 58°F 79% 1019 mb
Low level cloud: 31%
Mid level cloud: 27%
High level cloud: 9%
Most Significant Cloud Type: low
42%
0.0 In
Wed 29
May
00:00

NE
NE

2 / 3 mph 53 / 54°F 97% 1011 mb
Low level cloud: 86%
Mid level cloud: 78%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.1 In
06:00

ESE
ESE

2 / 3 mph 53 / 53°F 91% 1020 mb
Low level cloud: 39%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
47%
0.0 In
12:00

NNE
NNE

6 / 10 mph 59 / 59°F 72% 1011 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 1%
Most Significant Cloud Type: medium
15%
0.0 In
18:00

ENE
ENE

10 / 17 mph 59 / 59°F 86% 1017 mb
Low level cloud: 5%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
8%
0.1 In
Thu 30
May
00:00

SW
SW

6 / 13 mph 51 / 49°F 91% 1013 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 1%
Most Significant Cloud Type: medium
27%
0.0 In
06:00

E
E

2 / 3 mph 57 / 58°F 91% 1019 mb
Low level cloud: 11%
Mid level cloud: 4%
High level cloud: 9%
Most Significant Cloud Type: low
13%
0.0 In
12:00

ENE
ENE

9 / 14 mph 61 / 61°F 69% 1015 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 19%
Most Significant Cloud Type: medium
16%
0.0 In
18:00

E
E

13 / 27 mph 60 / 60°F 77% 1019 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
Fri 31
May
00:00

WSW
WSW

4 / 8 mph 54 / 53°F 96% 1015 mb
Low level cloud: 26%
Mid level cloud: 67%
High level cloud: 100%
Most Significant Cloud Type: low
61%
0.2 In
06:00

NE
NE

6 / 10 mph 53 / 52°F 86% 1020 mb
Low level cloud: 1%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
0.0 In
12:00

ESE
ESE

6 / 13 mph 56 / 55°F 85% 1015 mb
Low level cloud: 9%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: medium
72%
0.2 In
18:00

NE
NE

9 / 14 mph 58 / 56°F 80% 1019 mb
Low level cloud: 0%
Mid level cloud: 34%
High level cloud: 17%
Most Significant Cloud Type: medium
35%
0.0 In
Sat 01
Jun
00:00

SSW
SSW

5 / 10 mph 53 / 51°F 94% 1011 mb
Low level cloud: 18%
Mid level cloud: 87%
High level cloud: 32%
Most Significant Cloud Type: medium
100%
0.0 In
06:00

N
N

6 / 9 mph 50 / 48°F 92% 1018 mb
Low level cloud: 45%
Mid level cloud: 30%
High level cloud: 7%
Most Significant Cloud Type: low
55%
0.0 In
12:00

S
S

6 / 12 mph 62 / 62°F 80% 1008 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
49%
0.0 In
18:00

NE
NE

10 / 16 mph 58 / 56°F 93% 1015 mb
Low level cloud: 99%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Sun 02
Jun
00:00

WSW
WSW

7 / 14 mph 51 / 49°F 91% 1006 mb
Low level cloud: 77%
Mid level cloud: 25%
High level cloud: 11%
Most Significant Cloud Type: low
86%
0.0 In
06:00

ENE
ENE

5 / 9 mph 54 / 52°F 98% 1014 mb
Low level cloud: 89%
Mid level cloud: 4%
High level cloud: 11%
Most Significant Cloud Type: low
91%
0.2 In
12:00

SW
SW

9 / 20 mph 52 / 48°F 94% 1004 mb
Low level cloud: 91%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
18:00

ENE
ENE

10 / 17 mph 59 / 57°F 91% 1012 mb
Low level cloud: 40%
Mid level cloud: 53%
High level cloud: 18%
Most Significant Cloud Type: low
60%
0.0 In
Mon 03
Jun
00:00

SSE
SSE

8 / 16 mph 48 / 44°F 88% 1002 mb
Low level cloud: 3%
Mid level cloud: 45%
High level cloud: 22%
Most Significant Cloud Type: medium
54%
0.2 In
06:00

E
E

6 / 10 mph 54 / 53°F 99% 1010 mb
Low level cloud: 91%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
97%
0.1 In
12:00

SSE
SSE

5 / 10 mph 60 / 60°F 65% 1000 mb
Low level cloud: 38%
Mid level cloud: 29%
High level cloud: 17%
Most Significant Cloud Type: low
50%
0.0 In
18:00

SE
SE

13 / 26 mph 58 / 55°F 73% 1011 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 100%
Most Significant Cloud Type: medium
17%
0.0 In

Other Locations Near to Thomshill

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