Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Cilacap 14 Day Long Range Forecast

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

Indonesia

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

The outlook for Cilacap in the two weeks ahead shows the average daytime maximum temperature will be around 31°C, with a high for the two weeks of 36°C expected on the afternoon of Saturday 21st. The mean minimum temperature will be 26°C, dipping to its lowest on the morning of Sunday 29th at 23°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. Current predictions suggest Saturday 28th will have the most precipitation with an accumulation of around 55.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 21
Dec		22:00

NE
NE

 7 / 11 mph 85 / 100°F 89% 1009 mb
Low level cloud: 21%
Mid level cloud: 51%
High level cloud: 71%
Most Significant Cloud Type: low
47%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
Sun 22
Dec		01:00

NE
NE

 7 / 8 mph 83 / 93°F 87% 1008 mb
Low level cloud: 8%
Mid level cloud: 32%
High level cloud: 33%
Most Significant Cloud Type: medium
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

 1 / 2 mph 80 / 86°F 83% 1008 mb
Low level cloud: 10%
Mid level cloud: 45%
High level cloud: 20%
Most Significant Cloud Type: medium
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 2 / 3 mph 82 / 84°F 81% 1010 mb
Low level cloud: 7%
Mid level cloud: 17%
High level cloud: 14%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSE
SSE

 1 / 1 mph 89 / 94°F 72% 1009 mb
Low level cloud: 17%
Mid level cloud: 26%
High level cloud: 15%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 9 / 13 mph 93 / 111°F 77% 1007 mb
Low level cloud: 5%
Mid level cloud: 24%
High level cloud: 9%
Most Significant Cloud Type: medium
38%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

SW
SW

 8 / 13 mph 93 / 111°F 73% 1006 mb
Low level cloud: 15%
Mid level cloud: 25%
High level cloud: 2%
Most Significant Cloud Type: low
24%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

W
W

 9 / 15 mph 89 / 109°F 82% 1008 mb
Low level cloud: 6%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: medium
51%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
22:00

W
W

 7 / 11 mph 85 / 97°F 82% 1009 mb
Low level cloud: 18%
Mid level cloud: 44%
High level cloud: 99%
Most Significant Cloud Type: low
45%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Mon 23
Dec		01:00

N
N

 9 / 12 mph 81 / 88°F 86% 1008 mb
Low level cloud: 12%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
80%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
04:00

N
N

 4 / 6 mph 79 / 84°F 86% 1008 mb
Low level cloud: 5%
Mid level cloud: 47%
High level cloud: 77%
Most Significant Cloud Type: medium
63%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
07:00

NNE
NNE

 4 / 7 mph 80 / 82°F 82% 1010 mb
Low level cloud: 10%
Mid level cloud: 52%
High level cloud: 95%
Most Significant Cloud Type: medium
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SE
SE

 2 / 3 mph 86 / 89°F 72% 1010 mb
Low level cloud: 7%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: medium
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 5 / 7 mph 89 / 98°F 75% 1008 mb
Low level cloud: 22%
Mid level cloud: 43%
High level cloud: 49%
Most Significant Cloud Type: low
42%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

WSW
WSW

 11 / 14 mph 88 / 103°F 81% 1007 mb
Low level cloud: 56%
Mid level cloud: 46%
High level cloud: 28%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 6 / 8 mph 86 / 100°F 82% 1008 mb
Low level cloud: 32%
Mid level cloud: 47%
High level cloud: 32%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 4 / 6 mph 83 / 93°F 85% 1009 mb
Low level cloud: 23%
Mid level cloud: 43%
High level cloud: 33%
Most Significant Cloud Type: low
41%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Tue 24
Dec		01:00

NNE
NNE

 5 / 6 mph 81 / 90°F 86% 1008 mb
Low level cloud: 22%
Mid level cloud: 45%
High level cloud: 33%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

 3 / 4 mph 80 / 87°F 85% 1007 mb
Low level cloud: 13%
Mid level cloud: 43%
High level cloud: 33%
Most Significant Cloud Type: medium
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

N
N

 4 / 5 mph 83 / 85°F 83% 1009 mb
Low level cloud: 11%
Mid level cloud: 28%
High level cloud: 15%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 2 / 2 mph 89 / 92°F 71% 1009 mb
Low level cloud: 6%
Mid level cloud: 26%
High level cloud: 12%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 9 / 11 mph 91 / 103°F 71% 1007 mb
Low level cloud: 11%
Mid level cloud: 26%
High level cloud: 11%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

 13 / 17 mph 91 / 107°F 74% 1006 mb
Low level cloud: 14%
Mid level cloud: 24%
High level cloud: 13%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

 13 / 24 mph 87 / 104°F 81% 1008 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 13%
Most Significant Cloud Type: medium
47%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
22:00

W
W

 14 / 26 mph 84 / 95°F 84% 1010 mb
Low level cloud: 40%
Mid level cloud: 82%
High level cloud: 32%
Most Significant Cloud Type: low
72%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
Wed 25
Dec		01:00

N
N

 7 / 11 mph 79 / 86°F 90% 1009 mb
Low level cloud: 37%
Mid level cloud: 63%
High level cloud: 50%
Most Significant Cloud Type: low
64%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
04:00

N
N

 4 / 4 mph 78 / 83°F 87% 1009 mb
Low level cloud: 20%
Mid level cloud: 88%
High level cloud: 61%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNW
NNW

 4 / 5 mph 79 / 81°F 87% 1011 mb
Low level cloud: 15%
Mid level cloud: 44%
High level cloud: 60%
Most Significant Cloud Type: medium
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ENE
ENE

 4 / 5 mph 84 / 85°F 77% 1011 mb
Low level cloud: 19%
Mid level cloud: 45%
High level cloud: 33%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

 4 / 4 mph 86 / 90°F 77% 1009 mb
Low level cloud: 7%
Mid level cloud: 44%
High level cloud: 18%
Most Significant Cloud Type: medium
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 7 / 8 mph 87 / 90°F 75% 1008 mb
Low level cloud: 42%
Mid level cloud: 45%
High level cloud: 8%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

 13 / 19 mph 82 / 90°F 83% 1011 mb
Low level cloud: 75%
Mid level cloud: 44%
High level cloud: 13%
Most Significant Cloud Type: low
92%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

WSW
WSW

 12 / 17 mph 80 / 85°F 81% 1011 mb
Low level cloud: 22%
Mid level cloud: 77%
High level cloud: 11%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 26
Dec		01:00

WNW
WNW

 9 / 10 mph 80 / 87°F 85% 1010 mb
Low level cloud: 22%
Mid level cloud: 44%
High level cloud: 58%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WNW
WNW

 4 / 5 mph 80 / 86°F 85% 1010 mb
Low level cloud: 44%
Mid level cloud: 43%
High level cloud: 95%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

 6 / 10 mph 82 / 84°F 82% 1011 mb
Low level cloud: 44%
Mid level cloud: 35%
High level cloud: 100%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

W
W

 9 / 11 mph 84 / 91°F 77% 1011 mb
Low level cloud: 68%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 20 / 26 mph 88 / 101°F 79% 1010 mb
Low level cloud: 29%
Mid level cloud: 46%
High level cloud: 66%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 22 / 30 mph 89 / 105°F 82% 1009 mb
Low level cloud: 40%
Mid level cloud: 52%
High level cloud: 22%
Most Significant Cloud Type: low
60%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

WSW
WSW

 20 / 26 mph 85 / 97°F 81% 1011 mb
Low level cloud: 37%
Mid level cloud: 62%
High level cloud: 32%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 20 / 26 mph 82 / 90°F 81% 1012 mb
Low level cloud: 40%
Mid level cloud: 47%
High level cloud: 83%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 27
Dec		01:00

W
W

 19 / 28 mph 79 / 84°F 82% 1010 mb
Low level cloud: 87%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

 20 / 33 mph 78 / 82°F 82% 1009 mb
Low level cloud: 64%
Mid level cloud: 65%
High level cloud: 100%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

 14 / 19 mph 78 / 83°F 87% 1011 mb
Low level cloud: 61%
Mid level cloud: 54%
High level cloud: 99%
Most Significant Cloud Type: low
92%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

W
W

 15 / 21 mph 80 / 87°F 87% 1012 mb
Low level cloud: 73%
Mid level cloud: 69%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
13:00

W
W

 18 / 24 mph 84 / 91°F 84% 1010 mb
Low level cloud: 40%
Mid level cloud: 43%
High level cloud: 97%
Most Significant Cloud Type: low
66%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

W
W

 19 / 24 mph 83 / 91°F 82% 1009 mb
Low level cloud: 65%
Mid level cloud: 57%
High level cloud: 34%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

 19 / 24 mph 81 / 89°F 86% 1011 mb
Low level cloud: 72%
Mid level cloud: 84%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 17 / 24 mph 80 / 86°F 86% 1011 mb
Low level cloud: 76%
Mid level cloud: 92%
High level cloud: 67%
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
Sat 28
Dec		01:00

NNE
NNE

 10 / 21 mph 84 / 97°F 90% 1008 mb
Low level cloud: 23%
Mid level cloud: 80%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.3 In
07:00

W
W

 12 / 26 mph 81 / 87°F 80% 1010 mb
Low level cloud: 79%
Mid level cloud: 26%
High level cloud: 33%
Most Significant Cloud Type: low
91%
0.0 In
13:00

WSW
WSW

 13 / 27 mph 86 / 100°F 81% 1008 mb
Low level cloud: 57%
Mid level cloud: 45%
High level cloud: 16%
Most Significant Cloud Type: low
74%
0.0 In
19:00

W
W

 15 / 32 mph 83 / 95°F 89% 1008 mb
Low level cloud: 56%
Mid level cloud: 94%
High level cloud: 73%
Most Significant Cloud Type: low
97%
0.0 In
Sun 29
Dec		01:00

NNW
NNW

 2 / 4 mph 85 / 100°F 85% 1009 mb
Low level cloud: 19%
Mid level cloud: 45%
High level cloud: 91%
Most Significant Cloud Type: low
45%
0.0 In
07:00

NW
NW

 5 / 11 mph 80 / 87°F 93% 1010 mb
Low level cloud: 52%
Mid level cloud: 55%
High level cloud: 98%
Most Significant Cloud Type: low
82%
0.0 In
13:00

WSW
WSW

 13 / 28 mph 82 / 90°F 85% 1010 mb
Low level cloud: 72%
Mid level cloud: 60%
High level cloud: 70%
Most Significant Cloud Type: low
100%
0.0 In
19:00

WNW
WNW

 7 / 15 mph 83 / 94°F 89% 1009 mb
Low level cloud: 63%
Mid level cloud: 91%
High level cloud: 33%
Most Significant Cloud Type: low
99%
0.0 In
Mon 30
Dec		01:00

W
W

 9 / 19 mph 80 / 88°F 88% 1009 mb
Low level cloud: 92%
Mid level cloud: 49%
High level cloud: 47%
Most Significant Cloud Type: low
100%
0.0 In
07:00

W
W

 6 / 14 mph 80 / 86°F 88% 1010 mb
Low level cloud: 92%
Mid level cloud: 72%
High level cloud: 36%
Most Significant Cloud Type: low
100%
0.6 In
13:00

WSW
WSW

 12 / 25 mph 85 / 97°F 80% 1008 mb
Low level cloud: 72%
Mid level cloud: 46%
High level cloud: 11%
Most Significant Cloud Type: low
89%
0.4 In
19:00

SW
SW

 10 / 21 mph 85 / 98°F 81% 1008 mb
Low level cloud: 86%
Mid level cloud: 46%
High level cloud: 11%
Most Significant Cloud Type: low
100%
0.3 In
Tue 31
Dec		01:00

NW
NW

 8 / 16 mph 83 / 95°F 88% 1008 mb
Low level cloud: 22%
Mid level cloud: 51%
High level cloud: 33%
Most Significant Cloud Type: low
43%
0.1 In
07:00

NE
NE

 7 / 15 mph 80 / 88°F 88% 1009 mb
Low level cloud: 66%
Mid level cloud: 46%
High level cloud: 13%
Most Significant Cloud Type: low
83%
0.2 In
13:00

SW
SW

 11 / 22 mph 88 / 101°F 74% 1007 mb
Low level cloud: 53%
Mid level cloud: 42%
High level cloud: 32%
Most Significant Cloud Type: low
72%
0.0 In
19:00

NNE
NNE

 10 / 21 mph 89 / 113°F 89% 1007 mb
Low level cloud: 30%
Mid level cloud: 55%
High level cloud: 41%
Most Significant Cloud Type: low
54%
0.9 In
Wed 01
Jan		01:00

NE
NE

 8 / 16 mph 76 / 81°F 95% 1008 mb
Low level cloud: 70%
Mid level cloud: 50%
High level cloud: 100%
Most Significant Cloud Type: low
99%
0.9 In
07:00

NNE
NNE

 4 / 10 mph 83 / 92°F 85% 1009 mb
Low level cloud: 14%
Mid level cloud: 37%
High level cloud: 20%
Most Significant Cloud Type: low
29%
0.4 In
13:00

SSW
SSW

 6 / 12 mph 81 / 87°F 78% 1009 mb
Low level cloud: 8%
Mid level cloud: 46%
High level cloud: 99%
Most Significant Cloud Type: medium
73%
0.5 In
19:00

SE
SE

 3 / 6 mph 92 / 115°F 76% 1008 mb
Low level cloud: 22%
Mid level cloud: 46%
High level cloud: 19%
Most Significant Cloud Type: low
40%
0.3 In
Thu 02
Jan		01:00

W
W

 6 / 13 mph 86 / 100°F 81% 1008 mb
Low level cloud: 61%
Mid level cloud: 16%
High level cloud: 55%
Most Significant Cloud Type: low
73%
0.0 In
07:00

N
N

 2 / 5 mph 83 / 93°F 84% 1009 mb
Low level cloud: 16%
Mid level cloud: 37%
High level cloud: 44%
Most Significant Cloud Type: low
34%
0.1 In
13:00

SW
SW

 10 / 20 mph 91 / 109°F 71% 1008 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 4%
Most Significant Cloud Type: medium
43%
0.1 In
19:00

SW
SW

 3 / 7 mph 91 / 113°F 78% 1008 mb
Low level cloud: 10%
Mid level cloud: 30%
High level cloud: 8%
Most Significant Cloud Type: medium
57%
0.1 In
Fri 03
Jan		01:00

WSW
WSW

 11 / 22 mph 84 / 95°F 83% 1008 mb
Low level cloud: 21%
Mid level cloud: 46%
High level cloud: 78%
Most Significant Cloud Type: low
46%
0.6 In
07:00

SSW
SSW

 1 / 2 mph 83 / 91°F 79% 1010 mb
Low level cloud: 39%
Mid level cloud: 29%
High level cloud: 6%
Most Significant Cloud Type: low
49%
0.5 In
13:00

SW
SW

 13 / 27 mph 89 / 105°F 74% 1008 mb
Low level cloud: 7%
Mid level cloud: 21%
High level cloud: 44%
Most Significant Cloud Type: medium
43%
0.2 In
19:00

WSW
WSW

 11 / 22 mph 86 / 99°F 81% 1008 mb
Low level cloud: 70%
Mid level cloud: 11%
High level cloud: 2%
Most Significant Cloud Type: low
73%
0.0 In
Sat 04
Jan		01:00

WSW
WSW

 5 / 11 mph 84 / 96°F 84% 1008 mb
Low level cloud: 40%
Mid level cloud: 28%
High level cloud: 90%
Most Significant Cloud Type: low
60%
0.4 In
07:00

WSW
WSW

 7 / 15 mph 82 / 89°F 81% 1010 mb
Low level cloud: 80%
Mid level cloud: 25%
High level cloud: 19%
Most Significant Cloud Type: low
90%
0.2 In
13:00

SW
SW

 13 / 26 mph 86 / 97°F 75% 1008 mb
Low level cloud: 47%
Mid level cloud: 14%
High level cloud: 6%
Most Significant Cloud Type: low
52%
0.2 In
19:00

SW
SW

 9 / 18 mph 89 / 109°F 80% 1008 mb
Low level cloud: 64%
Mid level cloud: 21%
High level cloud: 3%
Most Significant Cloud Type: low
71%
0.2 In
Sun 05
Jan		01:00

WSW
WSW

 11 / 23 mph 82 / 91°F 84% 1009 mb
Low level cloud: 58%
Mid level cloud: 26%
High level cloud: 16%
Most Significant Cloud Type: low
69%
0.4 In
07:00

WSW
WSW

 4 / 9 mph 82 / 90°F 84% 1010 mb
Low level cloud: 65%
Mid level cloud: 32%
High level cloud: 33%
Most Significant Cloud Type: low
79%
0.5 In
13:00

SW
SW

 14 / 29 mph 86 / 99°F 78% 1008 mb
Low level cloud: 75%
Mid level cloud: 24%
High level cloud: 44%
Most Significant Cloud Type: low
89%
0.5 In
19:00

SW
SW

 8 / 16 mph 88 / 107°F 84% 1008 mb
Low level cloud: 54%
Mid level cloud: 19%
High level cloud: 18%
Most Significant Cloud Type: low
63%
0.3 In

Other Locations Near to Cilacap

Cities and Towns: Purwokerto, Indonesia

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