WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Ao Nang 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Ao Nang

Thailand

Long range weather outlook for Ao Nang includes 14 day forecast summary:

The outlook for Ao Nang in the two weeks ahead shows the average daytime maximum temperature will be around 30°C, with a high for the two weeks of 31°C expected on the afternoon of Sunday 9th. The average minimum temperature will be 26°C, dipping to its lowest on the morning of Thursday 6th at 25°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. It looks like Thursday 13th 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
Mon 03
Nov
19:00

NW
NW

9 / 12 mph 82 / 90°F 86% 1010 mb
Low level cloud: 5%
Mid level cloud: 43%
High level cloud: 37%
Most Significant Cloud Type: medium
59%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

NW
NW

7 / 10 mph 81 / 88°F 87% 1012 mb
Low level cloud: 17%
Mid level cloud: 32%
High level cloud: 40%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 04
Nov
01:00

NW
NW

8 / 11 mph 80 / 87°F 87% 1010 mb
Low level cloud: 25%
Mid level cloud: 22%
High level cloud: 62%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

8 / 11 mph 78 / 84°F 87% 1009 mb
Low level cloud: 34%
Mid level cloud: 27%
High level cloud: 20%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NW
NW

7 / 11 mph 81 / 83°F 86% 1011 mb
Low level cloud: 43%
Mid level cloud: 29%
High level cloud: 7%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

9 / 12 mph 84 / 87°F 76% 1013 mb
Low level cloud: 64%
Mid level cloud: 12%
High level cloud: 2%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

10 / 13 mph 86 / 92°F 71% 1010 mb
Low level cloud: 28%
Mid level cloud: 7%
High level cloud: 4%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

10 / 12 mph 87 / 93°F 71% 1008 mb
Low level cloud: 17%
Mid level cloud: 8%
High level cloud: 6%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

8 / 9 mph 84 / 94°F 83% 1010 mb
Low level cloud: 22%
Mid level cloud: 8%
High level cloud: 2%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WNW
WNW

7 / 9 mph 81 / 89°F 85% 1011 mb
Low level cloud: 31%
Mid level cloud: 6%
High level cloud: 16%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 05
Nov
01:00

WNW
WNW

7 / 11 mph 78 / 84°F 87% 1010 mb
Low level cloud: 49%
Mid level cloud: 9%
High level cloud: 19%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WNW
WNW

6 / 9 mph 78 / 83°F 88% 1009 mb
Low level cloud: 49%
Mid level cloud: 15%
High level cloud: 12%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WNW
WNW

5 / 8 mph 81 / 83°F 87% 1010 mb
Low level cloud: 44%
Mid level cloud: 16%
High level cloud: 4%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

7 / 10 mph 86 / 90°F 75% 1011 mb
Low level cloud: 52%
Mid level cloud: 17%
High level cloud: 14%
Most Significant Cloud Type: low
59%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
13:00

WSW
WSW

9 / 11 mph 87 / 93°F 64% 1008 mb
Low level cloud: 8%
Mid level cloud: 17%
High level cloud: 5%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

9 / 12 mph 86 / 91°F 72% 1007 mb
Low level cloud: 39%
Mid level cloud: 22%
High level cloud: 34%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

7 / 11 mph 79 / 85°F 84% 1009 mb
Low level cloud: 4%
Mid level cloud: 23%
High level cloud: 32%
Most Significant Cloud Type: medium
34%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

WNW
WNW

6 / 9 mph 78 / 83°F 83% 1011 mb
Low level cloud: 7%
Mid level cloud: 29%
High level cloud: 18%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 06
Nov
01:00

WNW
WNW

6 / 9 mph 78 / 83°F 85% 1009 mb
Low level cloud: 17%
Mid level cloud: 43%
High level cloud: 22%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WNW
WNW

6 / 9 mph 77 / 82°F 87% 1008 mb
Low level cloud: 35%
Mid level cloud: 43%
High level cloud: 43%
Most Significant Cloud Type: low
55%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
07:00

NW
NW

6 / 10 mph 81 / 83°F 84% 1010 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 22%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

W
W

11 / 13 mph 86 / 91°F 71% 1011 mb
Low level cloud: 27%
Mid level cloud: 46%
High level cloud: 30%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

13 / 15 mph 88 / 93°F 66% 1008 mb
Low level cloud: 2%
Mid level cloud: 47%
High level cloud: 20%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

13 / 17 mph 83 / 88°F 79% 1007 mb
Low level cloud: 50%
Mid level cloud: 46%
High level cloud: 27%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

10 / 16 mph 79 / 85°F 86% 1009 mb
Low level cloud: 9%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: medium
70%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

W
W

10 / 16 mph 79 / 85°F 86% 1010 mb
Low level cloud: 27%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
47%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Fri 07
Nov
01:00

WNW
WNW

12 / 18 mph 78 / 84°F 90% 1008 mb
Low level cloud: 57%
Mid level cloud: 35%
High level cloud: 24%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WNW
WNW

10 / 15 mph 78 / 84°F 88% 1008 mb
Low level cloud: 78%
Mid level cloud: 59%
High level cloud: 8%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WNW
WNW

10 / 15 mph 80 / 83°F 85% 1009 mb
Low level cloud: 55%
Mid level cloud: 22%
High level cloud: 4%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

W
W

13 / 15 mph 86 / 92°F 70% 1010 mb
Low level cloud: 45%
Mid level cloud: 20%
High level cloud: 18%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

14 / 17 mph 87 / 94°F 67% 1008 mb
Low level cloud: 22%
Mid level cloud: 18%
High level cloud: 28%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

13 / 16 mph 85 / 92°F 74% 1007 mb
Low level cloud: 27%
Mid level cloud: 27%
High level cloud: 15%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

11 / 17 mph 81 / 87°F 81% 1008 mb
Low level cloud: 46%
Mid level cloud: 27%
High level cloud: 31%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

9 / 14 mph 81 / 87°F 85% 1009 mb
Low level cloud: 63%
Mid level cloud: 16%
High level cloud: 38%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 08
Nov
01:00

W
W

8 / 12 mph 80 / 87°F 87% 1009 mb
Low level cloud: 56%
Mid level cloud: 12%
High level cloud: 34%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

9 / 16 mph 79 / 85°F 85% 1008 mb
Low level cloud: 35%
Mid level cloud: 23%
High level cloud: 65%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

10 / 16 mph 80 / 84°F 86% 1009 mb
Low level cloud: 7%
Mid level cloud: 18%
High level cloud: 33%
Most Significant Cloud Type: low
17%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

WSW
WSW

12 / 19 mph 83 / 89°F 82% 1011 mb
Low level cloud: 10%
Mid level cloud: 23%
High level cloud: 30%
Most Significant Cloud Type: low
21%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
13:00

WSW
WSW

12 / 21 mph 85 / 93°F 78% 1009 mb
Low level cloud: 19%
Mid level cloud: 27%
High level cloud: 32%
Most Significant Cloud Type: low
31%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

W
W

11 / 15 mph 86 / 93°F 75% 1008 mb
Low level cloud: 45%
Mid level cloud: 22%
High level cloud: 19%
Most Significant Cloud Type: low
54%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

W
W

6 / 7 mph 84 / 94°F 83% 1009 mb
Low level cloud: 21%
Mid level cloud: 18%
High level cloud: 9%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

6 / 8 mph 82 / 89°F 82% 1011 mb
Low level cloud: 44%
Mid level cloud: 19%
High level cloud: 16%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 09
Nov
01:00

WSW
WSW

6 / 9 mph 81 / 87°F 83% 1010 mb
Low level cloud: 52%
Mid level cloud: 17%
High level cloud: 32%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

6 / 11 mph 79 / 84°F 84% 1008 mb
Low level cloud: 59%
Mid level cloud: 19%
High level cloud: 19%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

5 / 9 mph 82 / 84°F 85% 1010 mb
Low level cloud: 51%
Mid level cloud: 18%
High level cloud: 6%
Most Significant Cloud Type: low
58%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

W
W

8 / 13 mph 85 / 88°F 74% 1012 mb
Low level cloud: 17%
Mid level cloud: 23%
High level cloud: 7%
Most Significant Cloud Type: low
25%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
13:00

WSW
WSW

11 / 13 mph 87 / 92°F 67% 1009 mb
Low level cloud: 39%
Mid level cloud: 24%
High level cloud: 1%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

11 / 12 mph 88 / 95°F 72% 1008 mb
Low level cloud: 42%
Mid level cloud: 27%
High level cloud: 1%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

8 / 9 mph 84 / 94°F 80% 1009 mb
Low level cloud: 27%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

6 / 7 mph 82 / 90°F 82% 1011 mb
Low level cloud: 20%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 10
Nov
01:00

WNW
WNW

7 / 15 mph 81 / 88°F 84% 1009 mb
Low level cloud: 26%
Mid level cloud: 17%
High level cloud: 9%
Most Significant Cloud Type: low
32%
0.0 In
07:00

WNW
WNW

7 / 14 mph 79 / 85°F 84% 1010 mb
Low level cloud: 49%
Mid level cloud: 13%
High level cloud: 11%
Most Significant Cloud Type: low
54%
0.0 In
13:00

W
W

12 / 25 mph 84 / 92°F 75% 1009 mb
Low level cloud: 44%
Mid level cloud: 20%
High level cloud: 4%
Most Significant Cloud Type: low
51%
0.0 In
19:00

WNW
WNW

10 / 20 mph 84 / 94°F 81% 1008 mb
Low level cloud: 10%
Mid level cloud: 19%
High level cloud: 97%
Most Significant Cloud Type: medium
52%
0.0 In
Tue 11
Nov
01:00

WNW
WNW

7 / 15 mph 81 / 88°F 83% 1010 mb
Low level cloud: 19%
Mid level cloud: 26%
High level cloud: 8%
Most Significant Cloud Type: low
28%
0.0 In
07:00

WNW
WNW

7 / 14 mph 79 / 85°F 84% 1009 mb
Low level cloud: 8%
Mid level cloud: 16%
High level cloud: 19%
Most Significant Cloud Type: low
15%
0.0 In
13:00

W
W

9 / 20 mph 86 / 94°F 66% 1009 mb
Low level cloud: 20%
Mid level cloud: 18%
High level cloud: 16%
Most Significant Cloud Type: low
27%
0.0 In
19:00

WNW
WNW

9 / 18 mph 82 / 91°F 84% 1009 mb
Low level cloud: 7%
Mid level cloud: 49%
High level cloud: 98%
Most Significant Cloud Type: medium
71%
0.0 In
Wed 12
Nov
01:00

WNW
WNW

9 / 19 mph 81 / 88°F 84% 1009 mb
Low level cloud: 18%
Mid level cloud: 28%
High level cloud: 33%
Most Significant Cloud Type: low
31%
0.0 In
07:00

NW
NW

6 / 12 mph 79 / 84°F 87% 1010 mb
Low level cloud: 8%
Mid level cloud: 25%
High level cloud: 8%
Most Significant Cloud Type: medium
48%
0.2 In
13:00

W
W

11 / 23 mph 85 / 93°F 68% 1008 mb
Low level cloud: 27%
Mid level cloud: 26%
High level cloud: 6%
Most Significant Cloud Type: low
36%
0.1 In
19:00

W
W

7 / 15 mph 82 / 91°F 85% 1009 mb
Low level cloud: 1%
Mid level cloud: 33%
High level cloud: 61%
Most Significant Cloud Type: medium
37%
0.3 In
Thu 13
Nov
01:00

WNW
WNW

6 / 13 mph 80 / 87°F 88% 1010 mb
Low level cloud: 23%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
42%
0.3 In
07:00

NNE
NNE

3 / 6 mph 79 / 85°F 89% 1010 mb
Low level cloud: 11%
Mid level cloud: 19%
High level cloud: 10%
Most Significant Cloud Type: low
18%
0.1 In
13:00

W
W

11 / 22 mph 82 / 90°F 83% 1010 mb
Low level cloud: 51%
Mid level cloud: 46%
High level cloud: 21%
Most Significant Cloud Type: low
69%
0.7 In
19:00

W
W

7 / 14 mph 79 / 83°F 82% 1009 mb
Low level cloud: 10%
Mid level cloud: 46%
High level cloud: 3%
Most Significant Cloud Type: medium
73%
0.1 In
Fri 14
Nov
01:00

NW
NW

6 / 12 mph 79 / 85°F 89% 1010 mb
Low level cloud: 49%
Mid level cloud: 45%
High level cloud: 28%
Most Significant Cloud Type: low
68%
0.2 In
07:00

NE
NE

4 / 8 mph 78 / 83°F 88% 1010 mb
Low level cloud: 11%
Mid level cloud: 22%
High level cloud: 11%
Most Significant Cloud Type: low
20%
0.0 In
13:00

ENE
ENE

1 / 2 mph 84 / 94°F 79% 1010 mb
Low level cloud: 29%
Mid level cloud: 44%
High level cloud: 13%
Most Significant Cloud Type: low
45%
0.3 In
19:00

N
N

2 / 4 mph 82 / 91°F 82% 1009 mb
Low level cloud: 27%
Mid level cloud: 11%
High level cloud: 7%
Most Significant Cloud Type: low
30%
0.1 In
Sat 15
Nov
01:00

NNE
NNE

4 / 9 mph 77 / 83°F 91% 1010 mb
Low level cloud: 26%
Mid level cloud: 48%
High level cloud: 15%
Most Significant Cloud Type: low
44%
0.4 In
07:00

NE
NE

6 / 13 mph 75 / 80°F 91% 1010 mb
Low level cloud: 31%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
35%
0.0 In
13:00

N
N

2 / 4 mph 89 / 102°F 71% 1009 mb
Low level cloud: 36%
Mid level cloud: 40%
High level cloud: 6%
Most Significant Cloud Type: low
51%
0.2 In
19:00

NNE
NNE

9 / 18 mph 77 / 80°F 83% 1009 mb
Low level cloud: 20%
Mid level cloud: 16%
High level cloud: 8%
Most Significant Cloud Type: low
26%
0.1 In
Sun 16
Nov
01:00

NNE
NNE

8 / 16 mph 74 / 78°F 86% 1010 mb
Low level cloud: 22%
Mid level cloud: 44%
High level cloud: 3%
Most Significant Cloud Type: low
37%
0.4 In
07:00

NE
NE

7 / 15 mph 74 / 78°F 85% 1010 mb
Low level cloud: 7%
Mid level cloud: 15%
High level cloud: 2%
Most Significant Cloud Type: low
12%
0.0 In
13:00

NNE
NNE

2 / 4 mph 91 / 103°F 60% 1008 mb
Low level cloud: 29%
Mid level cloud: 32%
High level cloud: 1%
Most Significant Cloud Type: low
40%
0.0 In
19:00

NNE
NNE

9 / 18 mph 76 / 80°F 87% 1010 mb
Low level cloud: 58%
Mid level cloud: 27%
High level cloud: 6%
Most Significant Cloud Type: low
67%
0.1 In
Mon 17
Nov
01:00

NNE
NNE

9 / 19 mph 76 / 80°F 87% 1010 mb
Low level cloud: 31%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
40%
0.2 In
07:00

NE
NE

7 / 14 mph 74 / 78°F 89% 1010 mb
Low level cloud: 11%
Mid level cloud: 21%
High level cloud: 10%
Most Significant Cloud Type: low
19%
0.0 In
13:00

NW
NW

1 / 2 mph 90 / 102°F 64% 1008 mb
Low level cloud: 34%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
41%
0.0 In
19:00

NNE
NNE

7 / 14 mph 77 / 81°F 87% 1009 mb
Low level cloud: 33%
Mid level cloud: 27%
High level cloud: 32%
Most Significant Cloud Type: low
45%
0.2 In
Tue 18
Nov
01:00

NNE
NNE

8 / 17 mph 74 / 78°F 91% 1010 mb
Low level cloud: 46%
Mid level cloud: 46%
High level cloud: 3%
Most Significant Cloud Type: low
62%
0.3 In
07:00

NE
NE

4 / 10 mph 76 / 80°F 88% 1009 mb
Low level cloud: 9%
Mid level cloud: 45%
High level cloud: 4%
Most Significant Cloud Type: medium
68%
0.0 In
13:00

NNW
NNW

3 / 7 mph 90 / 101°F 63% 1008 mb
Low level cloud: 51%
Mid level cloud: 21%
High level cloud: 5%
Most Significant Cloud Type: low
59%
0.0 In
19:00

NNE
NNE

5 / 11 mph 78 / 83°F 89% 1008 mb
Low level cloud: 35%
Mid level cloud: 47%
High level cloud: 8%
Most Significant Cloud Type: low
52%
0.1 In

Other Locations Near to Ao Nang

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