WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Boston Spa 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Boston Spa

North Yorkshire, United Kingdom

Long range weather outlook for Boston Spa includes 14 day forecast summary:

For Boston Spa in the coming two weeks the average daytime maximum temperature will be around 11°C, with a high for the two weeks of 15°C expected on the afternoon of Friday 31st. The average minimum temperature will be 7°C, dipping to its lowest on the morning of Monday 27th at 3°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. The indicators are that Thursday 23rd will have the most precipitation with an accumulation of around 44.0mm. On the whole winds are likely to be moderate. The forecast suggests the strongest wind will be on the evening of Thursday 23rd, coming from a north westerly direction, and reaching around 26mph.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 21
Oct
18:00

W
W

18 / 21 mph 54 / 49°F 84% 988 mb
Low level cloud: 68%
Mid level cloud: 23%
High level cloud: 7%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

15 / 18 mph 52 / 47°F 84% 990 mb
Low level cloud: 24%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
Oct
00:00

W
W

14 / 22 mph 49 / 43°F 82% 992 mb
Low level cloud: 79%
Mid level cloud: 4%
High level cloud: 6%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

11 / 17 mph 50 / 45°F 79% 993 mb
Low level cloud: 50%
Mid level cloud: 6%
High level cloud: 21%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

8 / 13 mph 47 / 43°F 88% 995 mb
Low level cloud: 2%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

8 / 11 mph 50 / 47°F 73% 996 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

11 / 13 mph 55 / 51°F 63% 996 mb
Low level cloud: 48%
Mid level cloud: 17%
High level cloud: 2%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

9 / 11 mph 54 / 51°F 67% 995 mb
Low level cloud: 41%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

2 / 4 mph 49 / 49°F 76% 994 mb
Low level cloud: 68%
Mid level cloud: 41%
High level cloud: 100%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

4 / 6 mph 48 / 47°F 79% 991 mb
Low level cloud: 55%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
Oct
00:00

NNE
NNE

6 / 11 mph 45 / 41°F 89% 986 mb
Low level cloud: 96%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

15 / 27 mph 43 / 36°F 96% 981 mb
Low level cloud: 98%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
06:00

NNE
NNE

26 / 54 mph 42 / 32°F 92% 978 mb
Low level cloud: 100%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
09:00

N
N

26 / 44 mph 45 / 36°F 90% 978 mb
Low level cloud: 99%
Mid level cloud: 71%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
12:00

NNW
NNW

24 / 31 mph 48 / 40°F 90% 980 mb
Low level cloud: 100%
Mid level cloud: 74%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
15:00

NW
NW

25 / 29 mph 49 / 41°F 88% 984 mb
Low level cloud: 98%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
18:00

NW
NW

27 / 31 mph 48 / 39°F 86% 987 mb
Low level cloud: 68%
Mid level cloud: 100%
High level cloud: 14%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

WNW
WNW

23 / 32 mph 46 / 37°F 76% 989 mb
Low level cloud: 14%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
Oct
00:00

WNW
WNW

22 / 34 mph 45 / 36°F 75% 991 mb
Low level cloud: 4%
Mid level cloud: 44%
High level cloud: 58%
Most Significant Cloud Type: medium
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

19 / 32 mph 43 / 35°F 78% 991 mb
Low level cloud: 10%
Mid level cloud: 7%
High level cloud: 6%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

20 / 40 mph 42 / 33°F 74% 991 mb
Low level cloud: 64%
Mid level cloud: 28%
High level cloud: 4%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

16 / 25 mph 45 / 38°F 78% 991 mb
Low level cloud: 21%
Mid level cloud: 31%
High level cloud: 7%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

15 / 22 mph 48 / 42°F 72% 990 mb
Low level cloud: 8%
Mid level cloud: 35%
High level cloud: 97%
Most Significant Cloud Type: medium
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

15 / 19 mph 50 / 44°F 73% 990 mb
Low level cloud: 4%
Mid level cloud: 24%
High level cloud: 64%
Most Significant Cloud Type: medium
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

13 / 16 mph 48 / 43°F 81% 990 mb
Low level cloud: 11%
Mid level cloud: 45%
High level cloud: 85%
Most Significant Cloud Type: medium
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

9 / 14 mph 46 / 41°F 85% 990 mb
Low level cloud: 87%
Mid level cloud: 76%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 25
Oct
00:00

W
W

10 / 20 mph 45 / 39°F 81% 990 mb
Low level cloud: 77%
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
03:00

WNW
WNW

14 / 29 mph 44 / 37°F 80% 991 mb
Low level cloud: 89%
Mid level cloud: 86%
High level cloud: 47%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

16 / 29 mph 43 / 35°F 79% 992 mb
Low level cloud: 93%
Mid level cloud: 72%
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

WNW
WNW

18 / 23 mph 45 / 37°F 83% 994 mb
Low level cloud: 94%
Mid level cloud: 55%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WNW
WNW

20 / 23 mph 47 / 39°F 77% 994 mb
Low level cloud: 87%
Mid level cloud: 94%
High level cloud: 41%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

19 / 21 mph 48 / 41°F 79% 995 mb
Low level cloud: 86%
Mid level cloud: 64%
High level cloud: 89%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

19 / 21 mph 47 / 40°F 82% 996 mb
Low level cloud: 90%
Mid level cloud: 78%
High level cloud: 12%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

18 / 21 mph 45 / 38°F 83% 998 mb
Low level cloud: 93%
Mid level cloud: 57%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 26
Oct
00:00

NW
NW

17 / 30 mph 42 / 34°F 76% 999 mb
Low level cloud: 82%
Mid level cloud: 88%
High level cloud: 6%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

17 / 35 mph 41 / 32°F 78% 1000 mb
Low level cloud: 83%
Mid level cloud: 66%
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

NW
NW

16 / 33 mph 39 / 31°F 75% 1002 mb
Low level cloud: 92%
Mid level cloud: 28%
High level cloud: 31%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

17 / 29 mph 43 / 35°F 73% 1004 mb
Low level cloud: 78%
Mid level cloud: 32%
High level cloud: 22%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

15 / 23 mph 46 / 39°F 64% 1005 mb
Low level cloud: 94%
Mid level cloud: 31%
High level cloud: 9%
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 48 / 42°F 63% 1006 mb
Low level cloud: 43%
Mid level cloud: 22%
High level cloud: 4%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

8 / 9 mph 47 / 43°F 74% 1008 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 57%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

8 / 10 mph 44 / 39°F 73% 1008 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 9%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 27
Oct
00:00

WNW
WNW

9 / 13 mph 41 / 36°F 69% 1008 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 2%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

6 / 12 mph 38 / 34°F 81% 1007 mb
Low level cloud: 33%
Mid level cloud: 45%
High level cloud: 9%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

5 / 10 mph 43 / 40°F 88% 1006 mb
Low level cloud: 62%
Mid level cloud: 74%
High level cloud: 5%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

11 / 16 mph 49 / 44°F 85% 1005 mb
Low level cloud: 49%
Mid level cloud: 39%
High level cloud: 10%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

15 / 19 mph 53 / 48°F 70% 1005 mb
Low level cloud: 42%
Mid level cloud: 16%
High level cloud: 15%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

14 / 20 mph 52 / 46°F 76% 1003 mb
Low level cloud: 38%
Mid level cloud: 15%
High level cloud: 3%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

10 / 16 mph 47 / 42°F 89% 1001 mb
Low level cloud: 41%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

21 / 33 mph 50 / 44°F 81% 998 mb
Low level cloud: 70%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
73%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 28
Oct
00:00

W
W

13 / 21 mph 50 / 45°F 84% 1021 mb
Low level cloud: 30%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
30%
0.0 In
06:00

W
W

14 / 23 mph 51 / 46°F 89% 1023 mb
Low level cloud: 77%
Mid level cloud: 45%
High level cloud: 17%
Most Significant Cloud Type: low
94%
0.0 In
12:00

W
W

19 / 28 mph 53 / 47°F 69% 1019 mb
Low level cloud: 7%
Mid level cloud: 45%
High level cloud: 68%
Most Significant Cloud Type: medium
67%
0.0 In
18:00

W
W

11 / 17 mph 53 / 49°F 77% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
Wed 29
Oct
00:00

WNW
WNW

10 / 17 mph 45 / 39°F 73% 1018 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 33%
Most Significant Cloud Type: medium
13%
0.0 In
06:00

N
N

8 / 12 mph 43 / 38°F 94% 1005 mb
Low level cloud: 97%
Mid level cloud: 71%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SW
SW

16 / 23 mph 55 / 51°F 71% 1009 mb
Low level cloud: 30%
Mid level cloud: 100%
High level cloud: 21%
Most Significant Cloud Type: medium
100%
0.0 In
18:00

WNW
WNW

9 / 14 mph 51 / 47°F 77% 1021 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 6%
Most Significant Cloud Type: medium
13%
0.0 In
Thu 30
Oct
00:00

SSW
SSW

10 / 17 mph 49 / 45°F 87% 1016 mb
Low level cloud: 46%
Mid level cloud: 68%
High level cloud: 100%
Most Significant Cloud Type: low
81%
0.0 In
06:00

WSW
WSW

4 / 6 mph 45 / 43°F 90% 1025 mb
Low level cloud: 1%
Mid level cloud: 11%
High level cloud: 33%
Most Significant Cloud Type: medium
16%
0.0 In
12:00

SW
SW

18 / 30 mph 56 / 52°F 88% 1009 mb
Low level cloud: 100%
Mid level cloud: 80%
High level cloud: 34%
Most Significant Cloud Type: low
100%
0.1 In
18:00

SSW
SSW

4 / 6 mph 54 / 53°F 79% 1021 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
6%
0.0 In
Fri 31
Oct
00:00

SW
SW

15 / 26 mph 55 / 51°F 83% 1008 mb
Low level cloud: 5%
Mid level cloud: 3%
High level cloud: 1%
Most Significant Cloud Type: low
6%
0.0 In
06:00

SSE
SSE

6 / 11 mph 44 / 41°F 89% 1012 mb
Low level cloud: 6%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
64%
0.0 In
12:00

SW
SW

20 / 34 mph 61 / 61°F 83% 1003 mb
Low level cloud: 98%
Mid level cloud: 10%
High level cloud: 3%
Most Significant Cloud Type: low
100%
0.0 In
18:00

S
S

9 / 14 mph 50 / 47°F 95% 1001 mb
Low level cloud: 97%
Mid level cloud: 94%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
Sat 01
Nov
00:00

WSW
WSW

17 / 29 mph 57 / 54°F 81% 1006 mb
Low level cloud: 63%
Mid level cloud: 48%
High level cloud: 16%
Most Significant Cloud Type: low
81%
0.0 In
06:00

SSW
SSW

13 / 28 mph 54 / 50°F 91% 992 mb
Low level cloud: 33%
Mid level cloud: 44%
High level cloud: 92%
Most Significant Cloud Type: low
59%
0.3 In
12:00

SW
SW

22 / 38 mph 61 / 61°F 77% 1001 mb
Low level cloud: 91%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
18:00

SW
SW

16 / 25 mph 60 / 60°F 79% 995 mb
Low level cloud: 16%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
16%
0.0 In
Sun 02
Nov
00:00

W
W

12 / 20 mph 58 / 56°F 92% 997 mb
Low level cloud: 72%
Mid level cloud: 67%
High level cloud: 77%
Most Significant Cloud Type: low
100%
0.2 In
06:00

SSW
SSW

20 / 31 mph 53 / 48°F 72% 996 mb
Low level cloud: 50%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
54%
0.0 In
12:00

WSW
WSW

13 / 22 mph 51 / 47°F 67% 1002 mb
Low level cloud: 5%
Mid level cloud: 45%
High level cloud: 7%
Most Significant Cloud Type: medium
59%
0.0 In
18:00

SSW
SSW

23 / 37 mph 56 / 51°F 69% 991 mb
Low level cloud: 32%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: low
44%
0.0 In
Mon 03
Nov
00:00

WSW
WSW

9 / 16 mph 47 / 43°F 76% 1003 mb
Low level cloud: 13%
Mid level cloud: 81%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
06:00

SSW
SSW

20 / 38 mph 48 / 41°F 70% 994 mb
Low level cloud: 70%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
74%
0.0 In
12:00

W
W

14 / 24 mph 51 / 46°F 72% 1008 mb
Low level cloud: 31%
Mid level cloud: 25%
High level cloud: 14%
Most Significant Cloud Type: low
42%
0.0 In
18:00

SW
SW

13 / 21 mph 51 / 46°F 77% 995 mb
Low level cloud: 13%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: low
26%
0.0 In
Tue 04
Nov
00:00

SSW
SSW

10 / 17 mph 45 / 40°F 80% 1009 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: medium
28%
0.0 In
06:00

SW
SW

12 / 20 mph 46 / 40°F 79% 994 mb
Low level cloud: 89%
Mid level cloud: 44%
High level cloud: 72%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSW
SSW

11 / 19 mph 51 / 47°F 77% 998 mb
Low level cloud: 46%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
74%
0.1 In
18:00

NW
NW

11 / 19 mph 50 / 46°F 82% 999 mb
Low level cloud: 38%
Mid level cloud: 64%
High level cloud: 0%
Most Significant Cloud Type: low
60%
0.1 In
Wed 05
Nov
00:00

S
S

6 / 11 mph 44 / 41°F 92% 992 mb
Low level cloud: 89%
Mid level cloud: 64%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
06:00

W
W

6 / 11 mph 45 / 41°F 90% 1009 mb
Low level cloud: 7%
Mid level cloud: 64%
High level cloud: 3%
Most Significant Cloud Type: medium
83%
0.0 In
12:00

W
W

6 / 11 mph 48 / 45°F 70% 996 mb
Low level cloud: 5%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
42%
0.0 In
18:00

SW
SW

11 / 20 mph 49 / 44°F 69% 1011 mb
Low level cloud: 29%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: low
41%
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