WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Chinchon 14 Day Long Range Forecast

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

South Korea

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

Over the next 14 days the Chinchon forecast suggests the average daytime maximum temperature will be around 1°C, with a high for the two weeks of 8°C expected on the afternoon of Monday 29th. The mean minimum temperature will be -4°C, dipping to its lowest on the morning of Friday 26th at -9°C. The next 14 days will have mixed weather with some days dry and some seeing a little snow. The current forecast indicates Saturday 27th will have the most precipitation with an accumulation of around 1.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 26
Dec
18:00

NW
NW

8 / 10 mph 24 / 15°F 45% 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
21:00

NW
NW

4 / 5 mph 21 / 16°F 48% 1027 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 8%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 27
Dec
00:00

WSW
WSW

0 / 0 mph 20 / 20°F 48% 1027 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 63%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

1 / 2 mph 20 / 20°F 50% 1027 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 76%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

2 / 3 mph 20 / 18°F 51% 1027 mb
Low level cloud: 3%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: medium
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

2 / 3 mph 23 / 20°F 50% 1027 mb
Low level cloud: 30%
Mid level cloud: 42%
High level cloud: 32%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

5 / 6 mph 32 / 27°F 52% 1026 mb
Low level cloud: 34%
Mid level cloud: 12%
High level cloud: 33%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

8 / 9 mph 37 / 31°F 63% 1023 mb
Low level cloud: 86%
Mid level cloud: 45%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

2 / 3 mph 32 / 31°F 91% 1024 mb
Low level cloud: 73%
Mid level cloud: 45%
High level cloud: 35%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

3 / 4 mph 31 / 29°F 96% 1025 mb
Low level cloud: 76%
Mid level cloud: 15%
High level cloud: 14%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 28
Dec
00:00

SSE
SSE

3 / 4 mph 32 / 30°F 97% 1024 mb
Low level cloud: 98%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

3 / 5 mph 32 / 29°F 96% 1025 mb
Low level cloud: 60%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

4 / 6 mph 30 / 26°F 96% 1024 mb
Low level cloud: 71%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

4 / 5 mph 33 / 29°F 92% 1024 mb
Low level cloud: 64%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

5 / 6 mph 38 / 34°F 82% 1023 mb
Low level cloud: 61%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

4 / 6 mph 40 / 37°F 83% 1021 mb
Low level cloud: 94%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

3 / 7 mph 33 / 31°F 90% 1021 mb
Low level cloud: 36%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

4 / 8 mph 34 / 31°F 88% 1020 mb
Low level cloud: 97%
Mid level cloud: 4%
High level cloud: 12%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 29
Dec
00:00

SSE
SSE

5 / 10 mph 33 / 28°F 88% 1019 mb
Low level cloud: 78%
Mid level cloud: 33%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

5 / 11 mph 34 / 29°F 89% 1018 mb
Low level cloud: 69%
Mid level cloud: 31%
High level cloud: 3%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

6 / 13 mph 34 / 28°F 93% 1017 mb
Low level cloud: 26%
Mid level cloud: 20%
High level cloud: 32%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

6 / 11 mph 38 / 33°F 93% 1018 mb
Low level cloud: 92%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

12 / 14 mph 47 / 41°F 69% 1018 mb
Low level cloud: 57%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

13 / 15 mph 45 / 39°F 68% 1018 mb
Low level cloud: 52%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

7 / 8 mph 40 / 35°F 79% 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
21:00

W
W

4 / 5 mph 35 / 32°F 77% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 30
Dec
00:00

W
W

4 / 6 mph 31 / 27°F 58% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: high
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

3 / 5 mph 29 / 25°F 57% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 21%
Most Significant Cloud Type: high
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

3 / 4 mph 28 / 25°F 54% 1025 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
09:00

W
W

3 / 4 mph 30 / 27°F 41% 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
12:00

W
W

9 / 10 mph 37 / 30°F 37% 1025 mb
Low level cloud: 9%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

16 / 18 mph 36 / 26°F 62% 1023 mb
Low level cloud: 49%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

11 / 12 mph 32 / 23°F 59% 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
21:00

NW
NW

12 / 14 mph 26 / 15°F 49% 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
Wed 31
Dec
00:00

NW
NW

13 / 14 mph 24 / 12°F 49% 1028 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

11 / 13 mph 23 / 11°F 44% 1028 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

NNW
NNW

9 / 11 mph 21 / 12°F 46% 1028 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

NW
NW

9 / 11 mph 22 / 12°F 42% 1028 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

NW
NW

12 / 14 mph 27 / 16°F 32% 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
15:00

NW
NW

13 / 15 mph 28 / 17°F 32% 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
18:00

WNW
WNW

6 / 7 mph 28 / 22°F 51% 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
21:00

NW
NW

5 / 6 mph 23 / 17°F 49% 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
Thu 01
Jan
00:00

NW
NW

6 / 8 mph 23 / 15°F 43% 1027 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
03:00

NW
NW

7 / 9 mph 21 / 13°F 45% 1027 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 4%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

2 / 3 mph 20 / 17°F 50% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 14%
Most Significant Cloud Type: high
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

4 / 5 mph 22 / 17°F 45% 1027 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

NW
NW

10 / 12 mph 28 / 19°F 26% 1026 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
15:00

NW
NW

11 / 12 mph 30 / 21°F 28% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 21%
Most Significant Cloud Type: high
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

4 / 6 mph 26 / 21°F 43% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 17%
Most Significant Cloud Type: high
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNW
NNW

0 / 0 mph 24 / 24°F 43% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 20%
Most Significant Cloud Type: high
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 02
Jan
03:00

W
W

3 / 4 mph 31 / 28°F 41% 1025 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 35%
Most Significant Cloud Type: medium
4%
0.0 In
09:00

NW
NW

15 / 18 mph 25 / 12°F 38% 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

NW
NW

16 / 20 mph 30 / 18°F 40% 1024 mb
Low level cloud: 41%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
42%
0.0 In
21:00

WNW
WNW

5 / 7 mph 32 / 27°F 52% 1027 mb
Low level cloud: 19%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: low
21%
0.0 In
Sat 03
Jan
03:00

SW
SW

2 / 2 mph 28 / 28°F 60% 1027 mb
Low level cloud: 4%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
42%
0.0 In
09:00

SSE
SSE

1 / 1 mph 31 / 31°F 45% 1029 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
15:00

WNW
WNW

9 / 10 mph 40 / 34°F 59% 1022 mb
Low level cloud: 61%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
68%
0.0 In
21:00

WSW
WSW

2 / 3 mph 36 / 35°F 76% 1021 mb
Low level cloud: 47%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
49%
0.0 In
Sun 04
Jan
03:00

NW
NW

3 / 4 mph 33 / 30°F 87% 1025 mb
Low level cloud: 45%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
45%
0.0 In
09:00

WNW
WNW

7 / 9 mph 31 / 24°F 64% 1020 mb
Low level cloud: 69%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
69%
0.0 In
15:00

NW
NW

8 / 9 mph 36 / 30°F 54% 1026 mb
Low level cloud: 23%
Mid level cloud: 7%
High level cloud: 30%
Most Significant Cloud Type: low
29%
0.0 In
21:00

W
W

3 / 4 mph 32 / 29°F 55% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Mon 05
Jan
03:00

WSW
WSW

2 / 3 mph 33 / 31°F 74% 1027 mb
Low level cloud: 20%
Mid level cloud: 13%
High level cloud: 22%
Most Significant Cloud Type: low
27%
0.0 In
09:00

SW
SW

2 / 3 mph 32 / 30°F 61% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
0.0 In
15:00

WNW
WNW

14 / 17 mph 35 / 26°F 53% 1024 mb
Low level cloud: 20%
Mid level cloud: 1%
High level cloud: 3%
Most Significant Cloud Type: low
20%
0.0 In
21:00

NW
NW

5 / 6 mph 32 / 27°F 65% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Tue 06
Jan
03:00

NW
NW

9 / 11 mph 27 / 18°F 59% 1024 mb
Low level cloud: 19%
Mid level cloud: 32%
High level cloud: 62%
Most Significant Cloud Type: low
37%
0.0 In
09:00

S
S

3 / 3 mph 31 / 29°F 65% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
2%
0.0 In
15:00

NW
NW

16 / 19 mph 30 / 19°F 55% 1021 mb
Low level cloud: 99%
Mid level cloud: 93%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
21:00

S
S

4 / 5 mph 34 / 30°F 73% 1018 mb
Low level cloud: 1%
Mid level cloud: 5%
High level cloud: 3%
Most Significant Cloud Type: medium
8%
0.0 In
Wed 07
Jan
03:00

NW
NW

11 / 14 mph 19 / 7°F 70% 1022 mb
Low level cloud: 41%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
46%
0.1 In
09:00

S
S

4 / 5 mph 33 / 29°F 95% 1014 mb
Low level cloud: 89%
Mid level cloud: 56%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
15:00

NW
NW

11 / 14 mph 24 / 13°F 50% 1021 mb
Low level cloud: 39%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
40%
0.0 In
21:00

NW
NW

11 / 15 mph 26 / 16°F 65% 1017 mb
Low level cloud: 39%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
55%
0.0 In
Thu 08
Jan
03:00

SSW
SSW

3 / 4 mph 19 / 16°F 68% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
09:00

NNW
NNW

9 / 12 mph 19 / 8°F 78% 1020 mb
Low level cloud: 92%
Mid level cloud: 59%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
15:00

WNW
WNW

15 / 19 mph 30 / 19°F 53% 1023 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
3%
0.0 In
21:00

NNW
NNW

12 / 15 mph 17 / 4°F 68% 1022 mb
Low level cloud: 63%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
78%
0.1 In
Fri 09
Jan
03:00

SSW
SSW

2 / 2 mph 25 / 25°F 72% 1027 mb
Low level cloud: 4%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
6%
0.0 In
09:00

NW
NW

5 / 6 mph 18 / 11°F 68% 1025 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
4%
0.0 In
15:00

WSW
WSW

5 / 7 mph 37 / 33°F 88% 1025 mb
Low level cloud: 87%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
87%
0.0 In
21:00

SSE
SSE

1 / 2 mph 22 / 22°F 79% 1025 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
Sat 10
Jan
03:00

SSE
SSE

4 / 6 mph 31 / 27°F 78% 1026 mb
Low level cloud: 100%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
09:00

E
E

2 / 2 mph 22 / 22°F 73% 1026 mb
Low level cloud: 70%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
81%
0.0 In
15:00

SE
SE

4 / 5 mph 45 / 42°F 64% 1021 mb
Low level cloud: 9%
Mid level cloud: 22%
High level cloud: 100%
Most Significant Cloud Type: medium
51%
0.0 In
21:00

NW
NW

2 / 2 mph 28 / 28°F 72% 1027 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 20%
Most Significant Cloud Type: medium
9%
0.0 In

Other Locations Near to Chinchon

Cities and Towns: Chongju, 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