Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Padang Panjang 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Padang Panjang

Indonesia

Long range weather outlook for Padang Panjang includes 14 day forecast summary:

Taking a look at Padang Panjang over the coming two weeks and the average daytime maximum temperature will be around 26°C, with a high for the two weeks of 28°C expected on the afternoon of Tuesday 31st. The average minimum temperature will be 20°C, dipping to its lowest on the morning of Tuesday 24th at 17°C. The next 14 days will have some days seeing a little precipitation and some days with rain. The current forecast indicates Tuesday 24th will have the most precipitation with an accumulation of around 109.0mm. On the whole winds are likely to be light.

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

WSW
WSW

 2 / 2 mph 71 / 71°F 97% 1013 mb
Low level cloud: 52%
Mid level cloud: 44%
High level cloud: 31%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 22
Dec		01:00

W
W

 1 / 2 mph 70 / 70°F 97% 1013 mb
Low level cloud: 53%
Mid level cloud: 46%
High level cloud: 70%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

 1 / 2 mph 69 / 69°F 96% 1011 mb
Low level cloud: 42%
Mid level cloud: 30%
High level cloud: 33%
Most Significant Cloud Type: low
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NW
NW

 1 / 1 mph 73 / 70°F 92% 1012 mb
Low level cloud: 19%
Mid level cloud: 17%
High level cloud: 49%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 3 / 4 mph 80 / 79°F 61% 1012 mb
Low level cloud: 11%
Mid level cloud: 23%
High level cloud: 29%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 6 / 9 mph 82 / 81°F 55% 1009 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 31%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 6 / 9 mph 78 / 78°F 75% 1008 mb
Low level cloud: 24%
Mid level cloud: 35%
High level cloud: 12%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 2 / 3 mph 73 / 77°F 96% 1011 mb
Low level cloud: 36%
Mid level cloud: 30%
High level cloud: 9%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NW
NW

 1 / 1 mph 71 / 71°F 95% 1013 mb
Low level cloud: 27%
Mid level cloud: 30%
High level cloud: 9%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 23
Dec		01:00

WNW
WNW

 1 / 2 mph 70 / 70°F 94% 1012 mb
Low level cloud: 22%
Mid level cloud: 35%
High level cloud: 4%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

 1 / 2 mph 69 / 69°F 93% 1010 mb
Low level cloud: 13%
Mid level cloud: 18%
High level cloud: 6%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 2 / 3 mph 73 / 70°F 89% 1012 mb
Low level cloud: 5%
Mid level cloud: 17%
High level cloud: 19%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 1 / 1 mph 81 / 80°F 55% 1012 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 6%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 6 / 9 mph 81 / 80°F 59% 1009 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 5 / 9 mph 76 / 77°F 81% 1008 mb
Low level cloud: 58%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
73%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

W
W

 4 / 6 mph 70 / 70°F 99% 1011 mb
Low level cloud: 83%
Mid level cloud: 55%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

W
W

 4 / 6 mph 68 / 68°F 99% 1012 mb
Low level cloud: 90%
Mid level cloud: 75%
High level cloud: 93%
Most Significant Cloud Type: low
100%
Expect 0.8 In of precipitation over the past 3 hours.
0.8 In
Tue 24
Dec		01:00

W
W

 5 / 9 mph 66 / 66°F 99% 1011 mb
Low level cloud: 94%
Mid level cloud: 82%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 1.5 In of precipitation over the past 3 hours.
1.5 In
04:00

WSW
WSW

 6 / 11 mph 65 / 65°F 99% 1010 mb
Low level cloud: 86%
Mid level cloud: 54%
High level cloud: 85%
Most Significant Cloud Type: low
100%
Expect 2.0 In of precipitation over the past 3 hours.
2.0 In
07:00

W
W

 4 / 7 mph 65 / 64°F 99% 1012 mb
Low level cloud: 86%
Mid level cloud: 67%
High level cloud: 95%
Most Significant Cloud Type: low
100%
Expect 0.6 In of precipitation over the past 3 hours.
0.6 In
10:00

WSW
WSW

 4 / 6 mph 68 / 67°F 98% 1013 mb
Low level cloud: 79%
Mid level cloud: 45%
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

WSW
WSW

 4 / 5 mph 71 / 70°F 98% 1011 mb
Low level cloud: 79%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
98%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

WSW
WSW

 4 / 4 mph 72 / 76°F 93% 1010 mb
Low level cloud: 51%
Mid level cloud: 66%
High level cloud: 14%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 3 / 3 mph 70 / 70°F 97% 1013 mb
Low level cloud: 66%
Mid level cloud: 67%
High level cloud: 18%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 2 / 4 mph 68 / 68°F 97% 1014 mb
Low level cloud: 45%
Mid level cloud: 46%
High level cloud: 18%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 25
Dec		01:00

W
W

 3 / 4 mph 67 / 67°F 97% 1012 mb
Low level cloud: 42%
Mid level cloud: 43%
High level cloud: 7%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

 3 / 4 mph 66 / 66°F 98% 1011 mb
Low level cloud: 84%
Mid level cloud: 69%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 2 / 4 mph 68 / 66°F 98% 1013 mb
Low level cloud: 61%
Mid level cloud: 60%
High level cloud: 7%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 4 / 7 mph 68 / 66°F 93% 1014 mb
Low level cloud: 71%
Mid level cloud: 43%
High level cloud: 9%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 4 / 7 mph 70 / 67°F 90% 1012 mb
Low level cloud: 41%
Mid level cloud: 46%
High level cloud: 3%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 4 / 8 mph 68 / 67°F 94% 1010 mb
Low level cloud: 88%
Mid level cloud: 73%
High level cloud: 8%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

WSW
WSW

 2 / 4 mph 67 / 67°F 98% 1012 mb
Low level cloud: 64%
Mid level cloud: 33%
High level cloud: 16%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 1 / 2 mph 67 / 67°F 98% 1015 mb
Low level cloud: 61%
Mid level cloud: 44%
High level cloud: 20%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 26
Dec		01:00

WSW
WSW

 1 / 2 mph 68 / 68°F 98% 1014 mb
Low level cloud: 54%
Mid level cloud: 64%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

 2 / 3 mph 68 / 68°F 97% 1012 mb
Low level cloud: 47%
Mid level cloud: 71%
High level cloud: 22%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

 1 / 2 mph 69 / 67°F 97% 1013 mb
Low level cloud: 54%
Mid level cloud: 73%
High level cloud: 18%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 1 / 1 mph 77 / 77°F 73% 1014 mb
Low level cloud: 16%
Mid level cloud: 45%
High level cloud: 18%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 2 / 4 mph 77 / 77°F 79% 1011 mb
Low level cloud: 41%
Mid level cloud: 44%
High level cloud: 33%
Most Significant Cloud Type: low
60%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

WSW
WSW

 2 / 3 mph 76 / 76°F 88% 1010 mb
Low level cloud: 33%
Mid level cloud: 44%
High level cloud: 53%
Most Significant Cloud Type: low
54%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

NW
NW

 1 / 1 mph 71 / 71°F 97% 1012 mb
Low level cloud: 51%
Mid level cloud: 43%
High level cloud: 95%
Most Significant Cloud Type: low
77%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

NNE
NNE

 1 / 2 mph 71 / 71°F 96% 1015 mb
Low level cloud: 36%
Mid level cloud: 45%
High level cloud: 63%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 27
Dec		01:00

NNE
NNE

 1 / 2 mph 70 / 71°F 96% 1014 mb
Low level cloud: 36%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

 1 / 2 mph 69 / 69°F 96% 1013 mb
Low level cloud: 37%
Mid level cloud: 44%
High level cloud: 15%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

 1 / 2 mph 72 / 69°F 94% 1014 mb
Low level cloud: 24%
Mid level cloud: 31%
High level cloud: 41%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 3 / 5 mph 74 / 76°F 74% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 41%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 6 / 8 mph 81 / 80°F 57% 1012 mb
Low level cloud: 1%
Mid level cloud: 37%
High level cloud: 45%
Most Significant Cloud Type: medium
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 5 / 9 mph 79 / 79°F 64% 1010 mb
Low level cloud: 3%
Mid level cloud: 21%
High level cloud: 27%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 2 / 2 mph 73 / 77°F 95% 1013 mb
Low level cloud: 35%
Mid level cloud: 20%
High level cloud: 21%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WNW
WNW

 1 / 2 mph 71 / 71°F 92% 1014 mb
Low level cloud: 18%
Mid level cloud: 19%
High level cloud: 32%
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
Sat 28
Dec		01:00

W
W

 2 / 5 mph 73 / 78°F 91% 1013 mb
Low level cloud: 16%
Mid level cloud: 59%
High level cloud: 32%
Most Significant Cloud Type: medium
100%
0.0 In
07:00

W
W

 2 / 4 mph 75 / 79°F 88% 1013 mb
Low level cloud: 12%
Mid level cloud: 27%
High level cloud: 32%
Most Significant Cloud Type: low
24%
0.0 In
13:00

WSW
WSW

 5 / 11 mph 76 / 79°F 63% 1011 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 22%
Most Significant Cloud Type: medium
44%
0.0 In
19:00

WNW
WNW

 2 / 5 mph 77 / 82°F 92% 1011 mb
Low level cloud: 19%
Mid level cloud: 33%
High level cloud: 32%
Most Significant Cloud Type: low
34%
0.0 In
Sun 29
Dec		01:00

W
W

 2 / 5 mph 72 / 77°F 93% 1013 mb
Low level cloud: 29%
Mid level cloud: 44%
High level cloud: 27%
Most Significant Cloud Type: low
47%
0.0 In
07:00

W
W

 2 / 4 mph 73 / 77°F 88% 1012 mb
Low level cloud: 14%
Mid level cloud: 24%
High level cloud: 29%
Most Significant Cloud Type: low
25%
0.0 In
13:00

WSW
WSW

 6 / 13 mph 81 / 83°F 54% 1011 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 10%
Most Significant Cloud Type: medium
28%
0.0 In
19:00

W
W

 2 / 5 mph 76 / 81°F 94% 1011 mb
Low level cloud: 29%
Mid level cloud: 10%
High level cloud: 57%
Most Significant Cloud Type: low
39%
0.0 In
Mon 30
Dec		01:00

W
W

 2 / 3 mph 76 / 81°F 89% 1013 mb
Low level cloud: 8%
Mid level cloud: 17%
High level cloud: 10%
Most Significant Cloud Type: low
15%
0.0 In
07:00

W
W

 2 / 5 mph 71 / 71°F 94% 1013 mb
Low level cloud: 42%
Mid level cloud: 15%
High level cloud: 4%
Most Significant Cloud Type: low
47%
0.0 In
13:00

WSW
WSW

 7 / 14 mph 80 / 82°F 52% 1011 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 7%
Most Significant Cloud Type: medium
17%
0.0 In
19:00

W
W

 3 / 6 mph 79 / 86°F 92% 1013 mb
Low level cloud: 19%
Mid level cloud: 10%
High level cloud: 17%
Most Significant Cloud Type: low
24%
0.0 In
Tue 31
Dec		01:00

WNW
WNW

 2 / 4 mph 72 / 76°F 88% 1012 mb
Low level cloud: 3%
Mid level cloud: 32%
High level cloud: 31%
Most Significant Cloud Type: medium
40%
0.0 In
07:00

W
W

 2 / 4 mph 74 / 78°F 89% 1012 mb
Low level cloud: 12%
Mid level cloud: 29%
High level cloud: 20%
Most Significant Cloud Type: low
24%
0.0 In
13:00

WSW
WSW

 7 / 15 mph 82 / 83°F 50% 1010 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 8%
Most Significant Cloud Type: medium
28%
0.0 In
19:00

W
W

 3 / 6 mph 73 / 78°F 93% 1011 mb
Low level cloud: 31%
Mid level cloud: 46%
High level cloud: 93%
Most Significant Cloud Type: low
57%
0.0 In
Wed 01
Jan		01:00

W
W

 2 / 3 mph 72 / 77°F 89% 1012 mb
Low level cloud: 6%
Mid level cloud: 44%
High level cloud: 17%
Most Significant Cloud Type: medium
63%
0.0 In
07:00

W
W

 1 / 3 mph 72 / 76°F 86% 1011 mb
Low level cloud: 4%
Mid level cloud: 44%
High level cloud: 7%
Most Significant Cloud Type: medium
54%
0.0 In
13:00

WSW
WSW

 6 / 12 mph 83 / 84°F 49% 1010 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 7%
Most Significant Cloud Type: medium
44%
0.0 In
19:00

WSW
WSW

 3 / 6 mph 76 / 80°F 94% 1009 mb
Low level cloud: 37%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
40%
0.0 In
Thu 02
Jan		01:00

WNW
WNW

 1 / 2 mph 73 / 78°F 96% 1012 mb
Low level cloud: 39%
Mid level cloud: 44%
High level cloud: 3%
Most Significant Cloud Type: low
55%
0.1 In
07:00

N
N

 1 / 2 mph 76 / 80°F 85% 1010 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 17%
Most Significant Cloud Type: medium
9%
0.0 In
13:00

WSW
WSW

 6 / 12 mph 81 / 83°F 56% 1009 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 6%
Most Significant Cloud Type: medium
30%
0.0 In
19:00

WSW
WSW

 3 / 6 mph 75 / 80°F 96% 1009 mb
Low level cloud: 49%
Mid level cloud: 28%
High level cloud: 9%
Most Significant Cloud Type: low
59%
0.0 In
Fri 03
Jan		01:00

NNE
NNE

 2 / 4 mph 73 / 77°F 97% 1011 mb
Low level cloud: 35%
Mid level cloud: 45%
High level cloud: 86%
Most Significant Cloud Type: low
61%
0.2 In
07:00

W
W

 1 / 2 mph 73 / 78°F 92% 1010 mb
Low level cloud: 20%
Mid level cloud: 21%
High level cloud: 11%
Most Significant Cloud Type: low
28%
0.1 In
13:00

WSW
WSW

 3 / 7 mph 86 / 88°F 52% 1008 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 8%
Most Significant Cloud Type: medium
27%
0.0 In
19:00

W
W

 2 / 4 mph 74 / 78°F 96% 1010 mb
Low level cloud: 45%
Mid level cloud: 46%
High level cloud: 22%
Most Significant Cloud Type: low
63%
0.1 In
Sat 04
Jan		01:00

NNW
NNW

 1 / 2 mph 72 / 77°F 97% 1011 mb
Low level cloud: 37%
Mid level cloud: 48%
High level cloud: 17%
Most Significant Cloud Type: low
55%
0.4 In
07:00

W
W

 1 / 2 mph 71 / 71°F 94% 1011 mb
Low level cloud: 34%
Mid level cloud: 52%
High level cloud: 32%
Most Significant Cloud Type: low
55%
0.1 In
13:00

W
W

 3 / 6 mph 75 / 78°F 72% 1011 mb
Low level cloud: 26%
Mid level cloud: 44%
High level cloud: 22%
Most Significant Cloud Type: low
43%
0.0 In
19:00

WSW
WSW

 3 / 6 mph 69 / 69°F 99% 1011 mb
Low level cloud: 86%
Mid level cloud: 81%
High level cloud: 9%
Most Significant Cloud Type: low
100%
0.2 In
Sun 05
Jan		01:00

W
W

 1 / 3 mph 73 / 77°F 93% 1012 mb
Low level cloud: 24%
Mid level cloud: 35%
High level cloud: 33%
Most Significant Cloud Type: low
40%
0.0 In
07:00

WSW
WSW

 2 / 5 mph 68 / 68°F 99% 1012 mb
Low level cloud: 81%
Mid level cloud: 67%
High level cloud: 18%
Most Significant Cloud Type: low
100%
0.3 In
13:00

WSW
WSW

 6 / 13 mph 75 / 78°F 70% 1011 mb
Low level cloud: 42%
Mid level cloud: 46%
High level cloud: 16%
Most Significant Cloud Type: low
59%
0.0 In
19:00

W
W

 2 / 4 mph 74 / 78°F 98% 1012 mb
Low level cloud: 57%
Mid level cloud: 50%
High level cloud: 40%
Most Significant Cloud Type: low
79%
0.2 In

Other Locations Near to Padang Panjang

Cities and Towns: Bukit Tinggi, 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