WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Funafuti 14 Day Long Range Forecast

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

Tuvalu

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

The next 14 day outlook for Funafuti shows the average daytime maximum temperature will be around 32°C, with a high for the two weeks of 35°C expected on the afternoon of Friday 4th. The mean minimum temperature will be 28°C, dipping to its lowest on the morning of Wednesday 2nd at 27°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. Current predictions suggest Wednesday 2nd will have the most precipitation with an accumulation of around 11.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 02
Jul
18:00

ESE
ESE

21 / 29 mph 87 / 101°F 78% 1011 mb
Low level cloud: 78%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

21 / 28 mph 85 / 95°F 77% 1012 mb
Low level cloud: 74%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 03
Jul
00:00

ESE
ESE

22 / 26 mph 85 / 96°F 77% 1012 mb
Low level cloud: 73%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

21 / 28 mph 84 / 92°F 77% 1010 mb
Low level cloud: 64%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

22 / 35 mph 82 / 89°F 76% 1011 mb
Low level cloud: 73%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

22 / 28 mph 86 / 97°F 76% 1013 mb
Low level cloud: 71%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

21 / 28 mph 90 / 107°F 77% 1012 mb
Low level cloud: 74%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

20 / 30 mph 91 / 114°F 79% 1010 mb
Low level cloud: 70%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
75%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

ESE
ESE

18 / 27 mph 89 / 107°F 78% 1011 mb
Low level cloud: 75%
Mid level cloud: 19%
High level cloud: 2%
Most Significant Cloud Type: low
82%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

E
E

20 / 27 mph 87 / 100°F 78% 1012 mb
Low level cloud: 66%
Mid level cloud: 19%
High level cloud: 3%
Most Significant Cloud Type: low
72%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Fri 04
Jul
00:00

E
E

21 / 30 mph 86 / 99°F 78% 1012 mb
Low level cloud: 72%
Mid level cloud: 19%
High level cloud: 5%
Most Significant Cloud Type: low
79%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

E
E

21 / 27 mph 84 / 92°F 76% 1011 mb
Low level cloud: 62%
Mid level cloud: 11%
High level cloud: 1%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

21 / 30 mph 82 / 89°F 77% 1012 mb
Low level cloud: 65%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

21 / 25 mph 88 / 100°F 76% 1014 mb
Low level cloud: 52%
Mid level cloud: 6%
High level cloud: 1%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

20 / 27 mph 92 / 114°F 77% 1012 mb
Low level cloud: 72%
Mid level cloud: 6%
High level cloud: 1%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

21 / 26 mph 95 / 122°F 76% 1009 mb
Low level cloud: 67%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

21 / 25 mph 91 / 114°F 77% 1010 mb
Low level cloud: 64%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

21 / 28 mph 88 / 103°F 77% 1012 mb
Low level cloud: 69%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 05
Jul
00:00

ESE
ESE

20 / 26 mph 85 / 96°F 78% 1012 mb
Low level cloud: 78%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

20 / 28 mph 83 / 92°F 77% 1010 mb
Low level cloud: 83%
Mid level cloud: 7%
High level cloud: 1%
Most Significant Cloud Type: low
85%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

ESE
ESE

22 / 32 mph 82 / 89°F 77% 1011 mb
Low level cloud: 60%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

21 / 26 mph 87 / 96°F 76% 1013 mb
Low level cloud: 68%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

21 / 26 mph 89 / 107°F 78% 1011 mb
Low level cloud: 75%
Mid level cloud: 7%
High level cloud: 3%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

19 / 24 mph 91 / 111°F 76% 1009 mb
Low level cloud: 69%
Mid level cloud: 8%
High level cloud: 4%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

19 / 24 mph 89 / 105°F 76% 1010 mb
Low level cloud: 62%
Mid level cloud: 7%
High level cloud: 1%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

18 / 21 mph 86 / 98°F 76% 1012 mb
Low level cloud: 67%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 06
Jul
00:00

ESE
ESE

17 / 23 mph 85 / 96°F 76% 1011 mb
Low level cloud: 80%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

17 / 22 mph 84 / 92°F 78% 1010 mb
Low level cloud: 69%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

17 / 23 mph 82 / 89°F 77% 1011 mb
Low level cloud: 77%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

17 / 22 mph 87 / 97°F 77% 1012 mb
Low level cloud: 64%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

16 / 21 mph 91 / 108°F 77% 1011 mb
Low level cloud: 62%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

15 / 18 mph 92 / 114°F 76% 1009 mb
Low level cloud: 69%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

15 / 18 mph 90 / 108°F 77% 1010 mb
Low level cloud: 64%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

15 / 17 mph 87 / 100°F 76% 1011 mb
Low level cloud: 66%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 07
Jul
00:00

ESE
ESE

15 / 19 mph 84 / 92°F 78% 1010 mb
Low level cloud: 69%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

14 / 19 mph 82 / 89°F 78% 1009 mb
Low level cloud: 65%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

14 / 21 mph 81 / 87°F 77% 1010 mb
Low level cloud: 66%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

15 / 18 mph 85 / 92°F 76% 1012 mb
Low level cloud: 64%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

15 / 17 mph 88 / 99°F 76% 1010 mb
Low level cloud: 63%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

14 / 16 mph 89 / 103°F 76% 1008 mb
Low level cloud: 66%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

13 / 18 mph 87 / 99°F 75% 1009 mb
Low level cloud: 70%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

15 / 19 mph 85 / 94°F 76% 1011 mb
Low level cloud: 75%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 08
Jul
00:00

E
E

14 / 17 mph 84 / 92°F 77% 1010 mb
Low level cloud: 64%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

13 / 17 mph 82 / 89°F 77% 1009 mb
Low level cloud: 66%
Mid level cloud: 9%
High level cloud: 3%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

13 / 19 mph 81 / 87°F 77% 1010 mb
Low level cloud: 60%
Mid level cloud: 8%
High level cloud: 4%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

12 / 16 mph 85 / 92°F 76% 1011 mb
Low level cloud: 74%
Mid level cloud: 7%
High level cloud: 5%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

11 / 15 mph 88 / 99°F 77% 1010 mb
Low level cloud: 62%
Mid level cloud: 9%
High level cloud: 5%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

11 / 14 mph 89 / 102°F 77% 1008 mb
Low level cloud: 65%
Mid level cloud: 11%
High level cloud: 6%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

12 / 15 mph 86 / 99°F 77% 1009 mb
Low level cloud: 67%
Mid level cloud: 11%
High level cloud: 33%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

11 / 15 mph 85 / 94°F 77% 1011 mb
Low level cloud: 60%
Mid level cloud: 14%
High level cloud: 32%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 09
Jul
00:00

E
E

11 / 22 mph 85 / 96°F 77% 1010 mb
Low level cloud: 51%
Mid level cloud: 7%
High level cloud: 18%
Most Significant Cloud Type: low
55%
0.0 In
06:00

E
E

12 / 24 mph 81 / 88°F 78% 1009 mb
Low level cloud: 63%
Mid level cloud: 9%
High level cloud: 33%
Most Significant Cloud Type: low
69%
0.0 In
12:00

ESE
ESE

12 / 26 mph 86 / 96°F 73% 1010 mb
Low level cloud: 59%
Mid level cloud: 43%
High level cloud: 13%
Most Significant Cloud Type: low
75%
0.0 In
18:00

ESE
ESE

13 / 27 mph 86 / 100°F 79% 1009 mb
Low level cloud: 8%
Mid level cloud: 45%
High level cloud: 97%
Most Significant Cloud Type: medium
72%
0.0 In
Thu 10
Jul
00:00

ESE
ESE

10 / 21 mph 82 / 88°F 74% 1011 mb
Low level cloud: 15%
Mid level cloud: 43%
High level cloud: 57%
Most Significant Cloud Type: low
37%
0.0 In
06:00

E
E

14 / 30 mph 82 / 88°F 75% 1009 mb
Low level cloud: 67%
Mid level cloud: 23%
High level cloud: 9%
Most Significant Cloud Type: low
75%
0.0 In
12:00

ESE
ESE

15 / 31 mph 87 / 101°F 76% 1010 mb
Low level cloud: 75%
Mid level cloud: 10%
High level cloud: 31%
Most Significant Cloud Type: low
82%
0.0 In
18:00

ESE
ESE

16 / 33 mph 88 / 103°F 77% 1009 mb
Low level cloud: 62%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
65%
0.0 In
Fri 11
Jul
00:00

ESE
ESE

17 / 37 mph 85 / 96°F 77% 1009 mb
Low level cloud: 71%
Mid level cloud: 11%
High level cloud: 21%
Most Significant Cloud Type: low
77%
0.1 In
06:00

ESE
ESE

17 / 36 mph 82 / 88°F 76% 1010 mb
Low level cloud: 72%
Mid level cloud: 10%
High level cloud: 9%
Most Significant Cloud Type: low
76%
0.1 In
12:00

E
E

18 / 38 mph 89 / 108°F 77% 1009 mb
Low level cloud: 67%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
71%
0.1 In
18:00

ESE
ESE

18 / 37 mph 87 / 101°F 78% 1010 mb
Low level cloud: 64%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
68%
0.1 In
Sat 12
Jul
00:00

E
E

17 / 36 mph 85 / 96°F 78% 1010 mb
Low level cloud: 77%
Mid level cloud: 17%
High level cloud: 2%
Most Significant Cloud Type: low
83%
0.2 In
06:00

ESE
ESE

17 / 35 mph 82 / 88°F 78% 1010 mb
Low level cloud: 71%
Mid level cloud: 16%
High level cloud: 2%
Most Significant Cloud Type: low
77%
0.2 In
12:00

E
E

17 / 35 mph 88 / 105°F 78% 1009 mb
Low level cloud: 72%
Mid level cloud: 18%
High level cloud: 4%
Most Significant Cloud Type: low
79%
0.2 In
18:00

ESE
ESE

18 / 38 mph 86 / 100°F 79% 1010 mb
Low level cloud: 72%
Mid level cloud: 22%
High level cloud: 7%
Most Significant Cloud Type: low
80%
0.2 In
Sun 13
Jul
00:00

E
E

17 / 35 mph 82 / 88°F 78% 1009 mb
Low level cloud: 55%
Mid level cloud: 44%
High level cloud: 13%
Most Significant Cloud Type: low
71%
0.1 In
06:00

E
E

20 / 42 mph 80 / 87°F 83% 1010 mb
Low level cloud: 64%
Mid level cloud: 49%
High level cloud: 79%
Most Significant Cloud Type: low
90%
0.6 In
12:00

E
E

15 / 32 mph 86 / 99°F 80% 1010 mb
Low level cloud: 12%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: medium
81%
0.8 In
18:00

E
E

17 / 36 mph 87 / 98°F 70% 1009 mb
Low level cloud: 15%
Mid level cloud: 28%
High level cloud: 99%
Most Significant Cloud Type: low
36%
0.0 In
Mon 14
Jul
00:00

E
E

22 / 46 mph 82 / 89°F 78% 1010 mb
Low level cloud: 73%
Mid level cloud: 45%
High level cloud: 33%
Most Significant Cloud Type: low
92%
0.2 In
06:00

ESE
ESE

18 / 38 mph 80 / 85°F 78% 1009 mb
Low level cloud: 73%
Mid level cloud: 36%
High level cloud: 72%
Most Significant Cloud Type: low
94%
0.3 In
12:00

E
E

15 / 32 mph 87 / 98°F 74% 1008 mb
Low level cloud: 51%
Mid level cloud: 44%
High level cloud: 6%
Most Significant Cloud Type: low
67%
0.0 In
18:00

ESE
ESE

15 / 32 mph 87 / 100°F 79% 1008 mb
Low level cloud: 22%
Mid level cloud: 45%
High level cloud: 97%
Most Significant Cloud Type: low
49%
0.6 In
Tue 15
Jul
00:00

ESE
ESE

19 / 39 mph 85 / 93°F 73% 1009 mb
Low level cloud: 33%
Mid level cloud: 44%
High level cloud: 21%
Most Significant Cloud Type: low
50%
0.2 In
06:00

E
E

22 / 46 mph 82 / 88°F 78% 1007 mb
Low level cloud: 78%
Mid level cloud: 56%
High level cloud: 19%
Most Significant Cloud Type: low
100%
0.1 In
12:00

E
E

18 / 38 mph 88 / 102°F 75% 1008 mb
Low level cloud: 4%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: medium
55%
0.2 In
18:00

E
E

21 / 44 mph 88 / 103°F 78% 1007 mb
Low level cloud: 74%
Mid level cloud: 25%
High level cloud: 27%
Most Significant Cloud Type: low
86%
0.2 In
Wed 16
Jul
00:00

E
E

14 / 29 mph 84 / 94°F 79% 1008 mb
Low level cloud: 60%
Mid level cloud: 23%
High level cloud: 8%
Most Significant Cloud Type: low
68%
0.1 In
06:00

E
E

21 / 43 mph 82 / 89°F 79% 1008 mb
Low level cloud: 70%
Mid level cloud: 26%
High level cloud: 15%
Most Significant Cloud Type: low
80%
0.2 In
12:00

E
E

11 / 22 mph 87 / 99°F 75% 1009 mb
Low level cloud: 63%
Mid level cloud: 10%
High level cloud: 5%
Most Significant Cloud Type: low
67%
0.0 In
18:00

ENE
ENE

16 / 34 mph 88 / 102°F 78% 1007 mb
Low level cloud: 75%
Mid level cloud: 19%
High level cloud: 16%
Most Significant Cloud Type: low
83%
0.2 In
Thu 17
Jul
00:00

E
E

11 / 22 mph 84 / 94°F 79% 1009 mb
Low level cloud: 40%
Mid level cloud: 15%
High level cloud: 6%
Most Significant Cloud Type: low
46%
0.1 In
06:00

E
E

11 / 22 mph 80 / 85°F 77% 1009 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 63%
Most Significant Cloud Type: medium
27%
0.5 In
12:00

ESE
ESE

11 / 23 mph 87 / 100°F 74% 1009 mb
Low level cloud: 62%
Mid level cloud: 23%
High level cloud: 13%
Most Significant Cloud Type: low
71%
0.0 In
18:00

SE
SE

7 / 15 mph 85 / 95°F 73% 1009 mb
Low level cloud: 6%
Mid level cloud: 17%
High level cloud: 35%
Most Significant Cloud Type: medium
34%
0.4 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