Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Hwachon 14 Day Long Range Forecast

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

South Korea

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

Taking a look at Hwachon over the coming two weeks and the average daytime maximum temperature will be around 12°C, with a high for the two weeks of 19°C expected on the afternoon of Thursday 26th. The average minimum temperature will be 2°C, dipping to its lowest on the morning of Friday 20th at -3°C. Expect the following 14 days ahead to remain predominantly dry. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Mon 16
Mar		21:00

NW
NW

 2 / 4 mph 42 / 42°F 61% 1022 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 17
Mar		00:00

NW
NW

 1 / 2 mph 40 / 40°F 67% 1022 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
03:00

NW
NW

 1 / 2 mph 37 / 37°F 70% 1023 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
06:00

NNE
NNE

 0 / 1 mph 34 / 34°F 71% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: high
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 2 / 3 mph 42 / 40°F 52% 1023 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
12:00

SSW
SSW

 3 / 3 mph 51 / 50°F 31% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: high
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

 4 / 4 mph 54 / 52°F 24% 1019 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 12%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 2 / 3 mph 54 / 53°F 34% 1019 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
21:00

NNW
NNW

 2 / 4 mph 43 / 43°F 41% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 18
Mar		00:00

SE
SE

 1 / 1 mph 41 / 41°F 44% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 1 / 2 mph 40 / 40°F 48% 1018 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 84%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 3 / 4 mph 38 / 37°F 59% 1017 mb
Low level cloud: 0%
Mid level cloud: 93%
High level cloud: 100%
Most Significant Cloud Type: medium
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 2 / 3 mph 41 / 40°F 55% 1017 mb
Low level cloud: 0%
Mid level cloud: 71%
High level cloud: 3%
Most Significant Cloud Type: medium
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 4 / 5 mph 47 / 44°F 42% 1015 mb
Low level cloud: 0%
Mid level cloud: 59%
High level cloud: 0%
Most Significant Cloud Type: medium
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 7 / 8 mph 50 / 46°F 38% 1013 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 10 / 14 mph 46 / 40°F 46% 1013 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

 5 / 6 mph 40 / 37°F 74% 1016 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 19
Mar		00:00

W
W

 3 / 4 mph 38 / 36°F 76% 1017 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
03:00

NW
NW

 2 / 4 mph 34 / 32°F 67% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

 2 / 4 mph 31 / 29°F 57% 1019 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
09:00

SW
SW

 4 / 5 mph 38 / 34°F 29% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: high
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

 9 / 11 mph 44 / 38°F 24% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 39%
Most Significant Cloud Type: high
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 13 / 15 mph 45 / 39°F 33% 1016 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 11 / 16 mph 39 / 32°F 34% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 86%
Most Significant Cloud Type: high
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 5 / 6 mph 35 / 31°F 46% 1020 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
Fri 20
Mar		00:00

W
W

 3 / 5 mph 32 / 29°F 50% 1021 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
03:00

WSW
WSW

 3 / 6 mph 29 / 26°F 51% 1022 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
06:00

W
W

 3 / 5 mph 29 / 26°F 54% 1023 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
09:00

WNW
WNW

 4 / 5 mph 38 / 33°F 28% 1023 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
12:00

WNW
WNW

 8 / 9 mph 45 / 40°F 25% 1023 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
15:00

WNW
WNW

 10 / 11 mph 48 / 43°F 22% 1021 mb
Low level cloud: 0%
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
18:00

WNW
WNW

 6 / 7 mph 47 / 44°F 31% 1022 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
21:00

W
W

 2 / 3 mph 42 / 41°F 44% 1025 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
Sat 21
Mar		00:00

SW
SW

 2 / 4 mph 35 / 33°F 46% 1026 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
03:00

SSW
SSW

 3 / 5 mph 32 / 29°F 50% 1027 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
06:00

SSW
SSW

 3 / 5 mph 30 / 28°F 55% 1028 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
09:00

S
S

 3 / 3 mph 39 / 37°F 40% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 4 / 4 mph 50 / 49°F 28% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 87%
Most Significant Cloud Type: high
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 6 / 7 mph 53 / 49°F 30% 1023 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 5%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 4 / 5 mph 50 / 48°F 44% 1024 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 2 / 3 mph 47 / 47°F 59% 1024 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
Sun 22
Mar		00:00

WSW
WSW

 2 / 3 mph 37 / 37°F 62% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 94%
Most Significant Cloud Type: high
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 0 / 1 mph 36 / 36°F 61% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

 2 / 4 mph 35 / 35°F 65% 1022 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
09:00

SE
SE

 2 / 2 mph 43 / 43°F 45% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 5 / 6 mph 52 / 51°F 27% 1018 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 34%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

 6 / 7 mph 56 / 54°F 20% 1015 mb
Low level cloud: 0%
Mid level cloud: 93%
High level cloud: 7%
Most Significant Cloud Type: medium
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 4 / 6 mph 51 / 49°F 31% 1015 mb
Low level cloud: 0%
Mid level cloud: 86%
High level cloud: 0%
Most Significant Cloud Type: medium
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

 3 / 6 mph 45 / 43°F 43% 1015 mb
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 0%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Mon 23
Mar		03:00

SW
SW

 4 / 5 mph 40 / 38°F 70% 1019 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
09:00

NNW
NNW

 3 / 3 mph 40 / 39°F 65% 1020 mb
Low level cloud: 75%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
77%
0.0 In
15:00

WNW
WNW

 7 / 8 mph 51 / 48°F 29% 1016 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: medium
7%
0.0 In
21:00

WNW
WNW

 4 / 5 mph 40 / 38°F 44% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: high
18%
0.0 In
Tue 24
Mar		03:00

NNE
NNE

 1 / 1 mph 41 / 41°F 55% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 20%
Most Significant Cloud Type: high
19%
0.0 In
09:00

ESE
ESE

 3 / 4 mph 43 / 42°F 77% 1020 mb
Low level cloud: 80%
Mid level cloud: 49%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
15:00

ENE
ENE

 3 / 4 mph 57 / 57°F 41% 1019 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
0.0 In
21:00

W
W

 2 / 2 mph 48 / 48°F 52% 1016 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 75%
Most Significant Cloud Type: medium
11%
0.0 In
Wed 25
Mar		03:00

SW
SW

 1 / 2 mph 42 / 42°F 61% 1017 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 22%
Most Significant Cloud Type: medium
25%
0.0 In
09:00

SW
SW

 2 / 2 mph 49 / 49°F 49% 1018 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 76%
Most Significant Cloud Type: medium
21%
0.0 In
15:00

WNW
WNW

 7 / 8 mph 59 / 59°F 29% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 13%
Most Significant Cloud Type: medium
5%
0.0 In
21:00

W
W

 3 / 4 mph 50 / 50°F 51% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
Thu 26
Mar		03:00

W
W

 1 / 2 mph 47 / 47°F 58% 1019 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 3%
Most Significant Cloud Type: medium
13%
0.0 In
09:00

SSW
SSW

 1 / 1 mph 51 / 51°F 46% 1020 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
0.0 In
15:00

W
W

 6 / 7 mph 65 / 65°F 29% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
21:00

NE
NE

 5 / 6 mph 47 / 45°F 79% 1021 mb
Low level cloud: 1%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
Fri 27
Mar		03:00

SW
SW

 1 / 2 mph 49 / 49°F 47% 1019 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
09:00

ENE
ENE

 5 / 6 mph 44 / 41°F 65% 1025 mb
Low level cloud: 46%
Mid level cloud: 4%
High level cloud: 11%
Most Significant Cloud Type: low
48%
0.0 In
15:00

WSW
WSW

 4 / 5 mph 68 / 68°F 18% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 37%
Most Significant Cloud Type: high
36%
0.0 In
21:00

ENE
ENE

 4 / 4 mph 48 / 46°F 65% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 17%
Most Significant Cloud Type: high
17%
0.0 In
Sat 28
Mar		03:00

NE
NE

 3 / 6 mph 46 / 46°F 44% 1016 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
0.0 In
09:00

ENE
ENE

 2 / 3 mph 46 / 45°F 45% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
15:00

ENE
ENE

 6 / 6 mph 51 / 49°F 91% 1010 mb
Low level cloud: 98%
Mid level cloud: 100%
High level cloud: 3%
Most Significant Cloud Type: low
100%
0.4 In
21:00

W
W

 1 / 2 mph 49 / 49°F 40% 1023 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 37%
Most Significant Cloud Type: medium
46%
0.0 In
Sun 29
Mar		03:00

NNE
NNE

 5 / 8 mph 38 / 34°F 92% 1009 mb
Low level cloud: 92%
Mid level cloud: 78%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.6 In
09:00

SSW
SSW

 2 / 2 mph 49 / 49°F 43% 1023 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
15:00

NW
NW

 2 / 3 mph 47 / 47°F 84% 1009 mb
Low level cloud: 92%
Mid level cloud: 55%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
21:00

W
W

 3 / 4 mph 52 / 52°F 69% 1021 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
Mon 30
Mar		03:00

SSW
SSW

 3 / 4 mph 43 / 42°F 95% 1014 mb
Low level cloud: 37%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
36%
0.0 In
09:00

ENE
ENE

 2 / 2 mph 55 / 55°F 59% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
15:00

SW
SW

 11 / 13 mph 60 / 60°F 43% 1011 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 2%
Most Significant Cloud Type: medium
7%
0.0 In
21:00

ENE
ENE

 2 / 3 mph 57 / 57°F 46% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
0.0 In
Tue 31
Mar		03:00

WSW
WSW

 3 / 4 mph 47 / 46°F 85% 1011 mb
Low level cloud: 54%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
55%
0.0 In
09:00

SE
SE

 2 / 2 mph 60 / 60°F 47% 1018 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 6%
Most Significant Cloud Type: medium
8%
0.0 In
15:00

WNW
WNW

 13 / 15 mph 52 / 48°F 28% 1014 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 2%
Most Significant Cloud Type: high
2%
0.0 In
21:00

SW
SW

 2 / 2 mph 56 / 56°F 78% 1015 mb
Low level cloud: 87%
Mid level cloud: 81%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In

Other Locations Near to Hwachon

Cities and Towns: Cholwon, South Korea
Ski Resorts: Yongpyong, South Korea

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