WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Fairfield 14 Day Long Range Forecast

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

California, United States Of America

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

For Fairfield in the coming two weeks the average daytime maximum temperature will be around 27°C, with a high for the two weeks of 32°C expected on the afternoon of Tuesday 21st. The mean minimum temperature will be 11°C, dipping to its lowest on the morning of Saturday 25th at 9°C. The fortnight ahead will remain predominantly dry. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 18
May
01:00

WSW
WSW

12 / 21 mph 53 / 49°F 91% 1011 mb
Low level cloud: 25%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

11 / 17 mph 52 / 49°F 91% 1012 mb
Low level cloud: 27%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

13 / 15 mph 58 / 55°F 77% 1013 mb
Low level cloud: 5%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

13 / 15 mph 70 / 68°F 52% 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
13:00

WSW
WSW

15 / 18 mph 74 / 76°F 45% 1012 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
16:00

WSW
WSW

18 / 21 mph 70 / 69°F 49% 1011 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
19:00

SW
SW

17 / 26 mph 58 / 53°F 73% 1011 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
22:00

WSW
WSW

16 / 25 mph 52 / 47°F 80% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 83%
Most Significant Cloud Type: high
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May
19:00

SW
SW

10 / 14 mph 67 / 65°F 47% 1011 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

9 / 12 mph 58 / 57°F 67% 1012 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
01:00

W
W

8 / 11 mph 54 / 52°F 80% 1012 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
04:00

W
W

5 / 11 mph 50 / 48°F 83% 1012 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NW
NW

6 / 8 mph 62 / 59°F 49% 1014 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
10:00

NNW
NNW

9 / 10 mph 77 / 73°F 20% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 21%
Most Significant Cloud Type: high
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNW
NNW

9 / 10 mph 83 / 78°F 15% 1012 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
16:00

W
W

13 / 15 mph 80 / 77°F 26% 1011 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
19:00

WSW
WSW

11 / 17 mph 70 / 68°F 43% 1012 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
22:00

WSW
WSW

9 / 18 mph 59 / 59°F 57% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
01:00

W
W

6 / 13 mph 57 / 56°F 67% 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
04:00

WNW
WNW

5 / 10 mph 53 / 52°F 55% 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
07:00

NNW
NNW

5 / 6 mph 67 / 65°F 35% 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
10:00

N
N

7 / 8 mph 83 / 78°F 17% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

5 / 6 mph 89 / 83°F 12% 1013 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
16:00

WSW
WSW

14 / 16 mph 84 / 80°F 19% 1012 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
19:00

WSW
WSW

9 / 16 mph 72 / 74°F 34% 1012 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 88%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

9 / 14 mph 62 / 62°F 61% 1012 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May
01:00

SW
SW

8 / 11 mph 58 / 56°F 76% 1012 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
04:00

WSW
WSW

8 / 13 mph 55 / 52°F 84% 1012 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
07:00

WSW
WSW

10 / 12 mph 60 / 59°F 67% 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
10:00

WSW
WSW

10 / 11 mph 73 / 75°F 44% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

10 / 12 mph 81 / 78°F 33% 1010 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 33%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

13 / 15 mph 80 / 78°F 30% 1009 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 100%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

14 / 23 mph 67 / 66°F 43% 1009 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 20%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

12 / 18 mph 59 / 59°F 49% 1010 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May
01:00

WSW
WSW

9 / 16 mph 55 / 52°F 54% 1010 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 74%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

7 / 14 mph 52 / 49°F 60% 1011 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 62%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WNW
WNW

7 / 8 mph 60 / 57°F 45% 1012 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 7%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNW
NNW

7 / 8 mph 79 / 74°F 21% 1011 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 95%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

9 / 11 mph 80 / 76°F 20% 1009 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
16:00

SW
SW

14 / 16 mph 78 / 76°F 26% 1008 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
19:00

SW
SW

13 / 18 mph 68 / 67°F 43% 1009 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
22:00

WSW
WSW

11 / 17 mph 58 / 56°F 63% 1010 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
01:00

WSW
WSW

10 / 15 mph 54 / 51°F 76% 1011 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

7 / 10 mph 52 / 49°F 87% 1012 mb
Low level cloud: 1%
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
07:00

WSW
WSW

9 / 10 mph 58 / 55°F 67% 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
10:00

SW
SW

8 / 9 mph 71 / 69°F 41% 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
13:00

WSW
WSW

13 / 15 mph 77 / 76°F 31% 1012 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
16:00

SW
SW

16 / 18 mph 71 / 70°F 43% 1011 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
19:00

SW
SW

15 / 22 mph 61 / 60°F 60% 1012 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
22:00

SW
SW

13 / 17 mph 54 / 50°F 81% 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
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 25
May
04:00

SW
SW

12 / 18 mph 52 / 48°F 82% 1011 mb
Low level cloud: 17%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
17%
0.0 In
10:00

SW
SW

9 / 10 mph 61 / 61°F 56% 1014 mb
Low level cloud: 9%
Mid level cloud: 40%
High level cloud: 100%
Most Significant Cloud Type: medium
67%
0.0 In
16:00

SW
SW

14 / 16 mph 73 / 76°F 39% 1012 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
22:00

SW
SW

11 / 17 mph 52 / 48°F 81% 1015 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 8%
Most Significant Cloud Type: medium
2%
0.0 In
Sun 26
May
04:00

WSW
WSW

6 / 9 mph 51 / 49°F 96% 1017 mb
Low level cloud: 24%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
24%
0.0 In
10:00

W
W

3 / 4 mph 74 / 76°F 42% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
16:00

WSW
WSW

15 / 18 mph 74 / 75°F 34% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
22:00

SW
SW

10 / 18 mph 53 / 50°F 72% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Mon 27
May
04:00

WSW
WSW

6 / 10 mph 51 / 48°F 95% 1017 mb
Low level cloud: 18%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
17%
0.0 In
10:00

WSW
WSW

6 / 6 mph 74 / 76°F 38% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
16:00

WSW
WSW

14 / 16 mph 75 / 76°F 37% 1015 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
22:00

WSW
WSW

10 / 21 mph 56 / 53°F 70% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Tue 28
May
04:00

WSW
WSW

7 / 12 mph 51 / 49°F 94% 1017 mb
Low level cloud: 8%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
9%
0.0 In
10:00

WSW
WSW

4 / 4 mph 82 / 81°F 34% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
1%
0.0 In
16:00

WSW
WSW

14 / 16 mph 81 / 79°F 31% 1015 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
5%
0.0 In
22:00

WSW
WSW

12 / 23 mph 59 / 60°F 62% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Wed 29
May
04:00

WSW
WSW

7 / 12 mph 53 / 51°F 89% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
10:00

WSW
WSW

9 / 10 mph 77 / 76°F 31% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: high
10%
0.0 In
16:00

WSW
WSW

14 / 16 mph 80 / 80°F 36% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
22:00

SW
SW

14 / 23 mph 59 / 56°F 61% 1011 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Thu 30
May
04:00

W
W

6 / 11 mph 58 / 57°F 83% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
10:00

WSW
WSW

12 / 13 mph 73 / 75°F 34% 1014 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
16:00

WSW
WSW

13 / 15 mph 89 / 87°F 27% 1010 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: high
18%
0.0 In
22:00

WSW
WSW

7 / 13 mph 55 / 53°F 44% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Fri 31
May
04:00

WSW
WSW

8 / 16 mph 57 / 55°F 72% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 99%
Most Significant Cloud Type: high
99%
0.0 In
10:00

NW
NW

5 / 6 mph 75 / 74°F 14% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
16:00

WSW
WSW

14 / 16 mph 90 / 86°F 22% 1011 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: high
7%
0.0 In
22:00

WSW
WSW

8 / 16 mph 58 / 56°F 59% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sat 01
Jun
04:00

WSW
WSW

7 / 15 mph 58 / 56°F 76% 1011 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
10:00

NNW
NNW

6 / 7 mph 82 / 79°F 18% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
16:00

WSW
WSW

17 / 19 mph 87 / 84°F 27% 1007 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
22:00

WSW
WSW

11 / 22 mph 59 / 59°F 58% 1017 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 3%
Most Significant Cloud Type: medium
3%
0.0 In
Sun 02
Jun
04:00

WSW
WSW

10 / 18 mph 54 / 51°F 87% 1010 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
2%
0.0 In
10:00

WSW
WSW

7 / 8 mph 77 / 76°F 32% 1016 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 1%
Most Significant Cloud Type: medium
2%
0.0 In
16:00

WSW
WSW

16 / 18 mph 81 / 80°F 34% 1008 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
22:00

WSW
WSW

10 / 20 mph 62 / 62°F 61% 1011 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: high
9%
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