Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Chapelton 14 Day Long Range Forecast

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

South Lanarkshire, United Kingdom

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

Taking a look at Chapelton over the coming two weeks and the average daytime maximum temperature will be around 17°C, with a high for the two weeks of 21°C expected on the afternoon of Saturday 18th. The average minimum temperature will be 10°C, dipping to its lowest on the morning of Tuesday 21st at 5°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. The current forecast indicates Wednesday 22nd will have the most precipitation with an accumulation of around 3.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 16
May		21:00

NE
NE

 8 / 13 mph 53 / 49°F 93% 1010 mb
Low level cloud: 28%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 17
May		00:00

ENE
ENE

 9 / 13 mph 50 / 46°F 94% 1011 mb
Low level cloud: 50%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

 9 / 15 mph 49 / 45°F 92% 1010 mb
Low level cloud: 29%
Mid level cloud: 4%
High level cloud: 15%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 8 / 12 mph 52 / 49°F 89% 1011 mb
Low level cloud: 88%
Mid level cloud: 43%
High level cloud: 5%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 9 / 12 mph 55 / 52°F 85% 1012 mb
Low level cloud: 86%
Mid level cloud: 23%
High level cloud: 4%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 10 / 12 mph 61 / 60°F 78% 1013 mb
Low level cloud: 92%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 10 / 12 mph 62 / 61°F 76% 1013 mb
Low level cloud: 72%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

 8 / 10 mph 61 / 60°F 82% 1014 mb
Low level cloud: 78%
Mid level cloud: 16%
High level cloud: 8%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 4 / 7 mph 54 / 53°F 97% 1015 mb
Low level cloud: 80%
Mid level cloud: 3%
High level cloud: 16%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May		00:00

NE
NE

 4 / 6 mph 54 / 53°F 93% 1016 mb
Low level cloud: 86%
Mid level cloud: 18%
High level cloud: 9%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

 3 / 5 mph 54 / 53°F 93% 1016 mb
Low level cloud: 78%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NE
NE

 3 / 4 mph 56 / 54°F 90% 1017 mb
Low level cloud: 41%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 4 / 5 mph 64 / 62°F 72% 1016 mb
Low level cloud: 68%
Mid level cloud: 7%
High level cloud: 4%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 5 / 6 mph 66 / 65°F 65% 1016 mb
Low level cloud: 74%
Mid level cloud: 16%
High level cloud: 5%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

 3 / 3 mph 70 / 67°F 62% 1016 mb
Low level cloud: 52%
Mid level cloud: 9%
High level cloud: 11%
Most Significant Cloud Type: low
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 2 / 2 mph 68 / 65°F 83% 1016 mb
Low level cloud: 33%
Mid level cloud: 12%
High level cloud: 48%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 2 / 3 mph 58 / 58°F 94% 1017 mb
Low level cloud: 22%
Mid level cloud: 46%
High level cloud: 31%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May		00:00

NE
NE

 3 / 4 mph 54 / 54°F 94% 1018 mb
Low level cloud: 40%
Mid level cloud: 49%
High level cloud: 7%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

 4 / 5 mph 52 / 51°F 96% 1018 mb
Low level cloud: 79%
Mid level cloud: 91%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 4 / 6 mph 52 / 50°F 95% 1018 mb
Low level cloud: 75%
Mid level cloud: 49%
High level cloud: 4%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 6 / 7 mph 56 / 53°F 84% 1018 mb
Low level cloud: 54%
Mid level cloud: 52%
High level cloud: 12%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 7 / 9 mph 61 / 60°F 72% 1018 mb
Low level cloud: 55%
Mid level cloud: 56%
High level cloud: 20%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 9 / 11 mph 62 / 60°F 64% 1018 mb
Low level cloud: 20%
Mid level cloud: 43%
High level cloud: 59%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

 8 / 10 mph 57 / 54°F 70% 1018 mb
Low level cloud: 17%
Mid level cloud: 36%
High level cloud: 32%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 8 / 10 mph 53 / 49°F 74% 1019 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 32%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		00:00

NE
NE

 8 / 10 mph 50 / 47°F 84% 1019 mb
Low level cloud: 10%
Mid level cloud: 24%
High level cloud: 32%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

 7 / 10 mph 48 / 44°F 92% 1019 mb
Low level cloud: 37%
Mid level cloud: 16%
High level cloud: 15%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 6 / 9 mph 48 / 45°F 87% 1019 mb
Low level cloud: 25%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 9 / 10 mph 57 / 53°F 70% 1018 mb
Low level cloud: 47%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 10 / 11 mph 61 / 60°F 58% 1017 mb
Low level cloud: 9%
Mid level cloud: 13%
High level cloud: 2%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 10 / 11 mph 61 / 60°F 42% 1016 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 6%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

 8 / 9 mph 58 / 55°F 53% 1015 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 7%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 6 / 7 mph 56 / 53°F 74% 1016 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
Tue 21
May		00:00

ENE
ENE

 6 / 9 mph 44 / 41°F 89% 1015 mb
Low level cloud: 4%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

 6 / 9 mph 46 / 43°F 86% 1014 mb
Low level cloud: 96%
Mid level cloud: 44%
High level cloud: 16%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 5 / 7 mph 47 / 45°F 88% 1013 mb
Low level cloud: 91%
Mid level cloud: 44%
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

ENE
ENE

 5 / 7 mph 49 / 47°F 96% 1013 mb
Low level cloud: 95%
Mid level cloud: 67%
High level cloud: 61%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 4 / 6 mph 49 / 48°F 98% 1013 mb
Low level cloud: 96%
Mid level cloud: 94%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 5 / 7 mph 52 / 51°F 95% 1013 mb
Low level cloud: 92%
Mid level cloud: 46%
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

NE
NE

 6 / 8 mph 56 / 53°F 90% 1013 mb
Low level cloud: 49%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 5 / 8 mph 53 / 50°F 98% 1014 mb
Low level cloud: 66%
Mid level cloud: 4%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May		00:00

NE
NE

 7 / 11 mph 50 / 47°F 98% 1014 mb
Low level cloud: 87%
Mid level cloud: 94%
High level cloud: 80%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

 7 / 11 mph 50 / 47°F 99% 1014 mb
Low level cloud: 97%
Mid level cloud: 88%
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

NE
NE

 9 / 15 mph 51 / 47°F 97% 1013 mb
Low level cloud: 96%
Mid level cloud: 97%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 14 / 19 mph 55 / 51°F 90% 1012 mb
Low level cloud: 94%
Mid level cloud: 44%
High level cloud: 97%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 17 / 20 mph 60 / 60°F 72% 1011 mb
Low level cloud: 85%
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

NE
NE

 17 / 23 mph 55 / 50°F 83% 1010 mb
Low level cloud: 93%
Mid level cloud: 44%
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

NE
NE

 17 / 25 mph 51 / 45°F 96% 1010 mb
Low level cloud: 100%
Mid level cloud: 69%
High level cloud: 83%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 14 / 21 mph 51 / 46°F 98% 1011 mb
Low level cloud: 99%
Mid level cloud: 83%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 23
May		00:00

ENE
ENE

 8 / 16 mph 54 / 51°F 90% 1018 mb
Low level cloud: 8%
Mid level cloud: 13%
High level cloud: 43%
Most Significant Cloud Type: low
17%
0.0 In
06:00

S
S

 14 / 28 mph 48 / 42°F 85% 1012 mb
Low level cloud: 98%
Mid level cloud: 65%
High level cloud: 55%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ENE
ENE

 8 / 16 mph 62 / 62°F 54% 1027 mb
Low level cloud: 18%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
18:00

ENE
ENE

 12 / 25 mph 61 / 61°F 71% 1024 mb
Low level cloud: 3%
Mid level cloud: 3%
High level cloud: 20%
Most Significant Cloud Type: low
6%
0.0 In
Fri 24
May		00:00

SW
SW

 5 / 10 mph 51 / 49°F 92% 1011 mb
Low level cloud: 4%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
5%
0.0 In
06:00

WSW
WSW

 9 / 19 mph 47 / 43°F 89% 1011 mb
Low level cloud: 63%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
67%
0.0 In
12:00

E
E

 13 / 19 mph 55 / 51°F 71% 1023 mb
Low level cloud: 99%
Mid level cloud: 24%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
18:00

ENE
ENE

 9 / 13 mph 66 / 66°F 66% 1022 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
Sat 25
May		00:00

NE
NE

 9 / 13 mph 51 / 47°F 96% 1026 mb
Low level cloud: 73%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
73%
0.0 In
06:00

ENE
ENE

 2 / 3 mph 58 / 58°F 71% 1023 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 1%
Most Significant Cloud Type: high
1%
0.0 In
12:00

ENE
ENE

 13 / 20 mph 64 / 64°F 50% 1025 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 4%
Most Significant Cloud Type: medium
4%
0.0 In
18:00

WSW
WSW

 8 / 11 mph 65 / 65°F 69% 1020 mb
Low level cloud: 2%
Mid level cloud: 25%
High level cloud: 4%
Most Significant Cloud Type: medium
31%
0.0 In
Sun 26
May		00:00

NE
NE

 7 / 10 mph 52 / 49°F 82% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
0.0 In
06:00

SW
SW

 0 / 0 mph 57 / 57°F 88% 1020 mb
Low level cloud: 35%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
36%
0.0 In
12:00

ENE
ENE

 13 / 19 mph 63 / 63°F 52% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

NNW
NNW

 2 / 3 mph 69 / 69°F 76% 1019 mb
Low level cloud: 16%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
18%
0.0 In
Mon 27
May		00:00

NE
NE

 6 / 9 mph 50 / 47°F 85% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
06:00

ENE
ENE

 3 / 4 mph 52 / 53°F 95% 1017 mb
Low level cloud: 95%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ENE
ENE

 9 / 14 mph 66 / 66°F 46% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: high
9%
0.0 In
18:00

SSW
SSW

 8 / 15 mph 54 / 51°F 97% 1012 mb
Low level cloud: 95%
Mid level cloud: 69%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
Tue 28
May		00:00

NE
NE

 4 / 5 mph 58 / 59°F 93% 1022 mb
Low level cloud: 6%
Mid level cloud: 1%
High level cloud: 6%
Most Significant Cloud Type: low
6%
0.0 In
06:00

SSE
SSE

 6 / 11 mph 54 / 53°F 98% 1007 mb
Low level cloud: 88%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
12:00

E
E

 4 / 6 mph 71 / 71°F 54% 1021 mb
Low level cloud: 22%
Mid level cloud: 5%
High level cloud: 16%
Most Significant Cloud Type: low
25%
0.0 In
18:00

SSW
SSW

 6 / 11 mph 60 / 60°F 97% 1004 mb
Low level cloud: 93%
Mid level cloud: 71%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
Wed 29
May		00:00

NE
NE

 3 / 5 mph 59 / 60°F 90% 1022 mb
Low level cloud: 11%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.0 In
06:00

WSW
WSW

 5 / 10 mph 49 / 47°F 98% 1005 mb
Low level cloud: 89%
Mid level cloud: 21%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
12:00

ENE
ENE

 6 / 9 mph 70 / 70°F 54% 1020 mb
Low level cloud: 24%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
28%
0.0 In
18:00

ENE
ENE

 8 / 17 mph 52 / 49°F 83% 1011 mb
Low level cloud: 88%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
97%
0.0 In
Thu 30
May		00:00

NE
NE

 5 / 8 mph 56 / 56°F 92% 1021 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
5%
0.0 In
06:00

NE
NE

 7 / 15 mph 48 / 44°F 92% 1013 mb
Low level cloud: 92%
Mid level cloud: 52%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ENE
ENE

 6 / 11 mph 71 / 71°F 52% 1020 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
14%
0.0 In
18:00

ENE
ENE

 14 / 28 mph 52 / 47°F 81% 1009 mb
Low level cloud: 94%
Mid level cloud: 81%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Fri 31
May		00:00

ENE
ENE

 3 / 6 mph 60 / 60°F 84% 1021 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
06:00

NE
NE

 18 / 36 mph 44 / 36°F 97% 1002 mb
Low level cloud: 100%
Mid level cloud: 69%
High level cloud: 94%
Most Significant Cloud Type: low
100%
0.6 In
12:00

E
E

 3 / 5 mph 76 / 77°F 41% 1019 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 9%
Most Significant Cloud Type: medium
6%
0.0 In
18:00

ENE
ENE

 11 / 23 mph 48 / 43°F 97% 1001 mb
Low level cloud: 99%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 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