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Dunkerque 14 Day Long Range Forecast

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

France

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

Taking a look at Dunkerque over the coming two weeks and the average daytime maximum temperature will be around 17°C, with a high for the two weeks of 24°C expected on the afternoon of Tuesday 20th. The mean minimum temperature will be 12°C, dipping to its lowest on the morning of Thursday 15th at 10°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. Predictions are Monday 12th will have the most precipitation with an accumulation of around 9.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 12
May
16:00

NW
NW

5 / 8 mph 67 / 64°F 84% 1013 mb
Low level cloud: 46%
Mid level cloud: 9%
High level cloud: 8%
Most Significant Cloud Type: low
50%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

NNE
NNE

6 / 8 mph 66 / 63°F 89% 1013 mb
Low level cloud: 23%
Mid level cloud: 8%
High level cloud: 32%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

5 / 7 mph 60 / 60°F 95% 1015 mb
Low level cloud: 13%
Mid level cloud: 47%
High level cloud: 63%
Most Significant Cloud Type: medium
87%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Tue 13
May
01:00

ENE
ENE

2 / 3 mph 56 / 56°F 96% 1015 mb
Low level cloud: 22%
Mid level cloud: 31%
High level cloud: 12%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

3 / 6 mph 54 / 55°F 94% 1016 mb
Low level cloud: 12%
Mid level cloud: 13%
High level cloud: 11%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

5 / 9 mph 57 / 55°F 87% 1017 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 11%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ENE
ENE

6 / 8 mph 60 / 58°F 75% 1018 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 8%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNE
NNE

12 / 16 mph 64 / 63°F 67% 1018 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 4%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

15 / 23 mph 63 / 62°F 62% 1017 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

15 / 29 mph 58 / 55°F 73% 1017 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

11 / 20 mph 57 / 55°F 83% 1018 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 14
May
01:00

NE
NE

9 / 19 mph 55 / 52°F 81% 1018 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
04:00

ENE
ENE

8 / 15 mph 54 / 52°F 79% 1018 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
07:00

NE
NE

9 / 16 mph 54 / 50°F 76% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: high
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

13 / 21 mph 57 / 53°F 70% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 36%
Most Significant Cloud Type: high
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNE
NNE

15 / 18 mph 60 / 59°F 68% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 96%
Most Significant Cloud Type: high
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

16 / 19 mph 61 / 60°F 64% 1020 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
19:00

NNE
NNE

15 / 17 mph 58 / 55°F 80% 1020 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 19%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

15 / 17 mph 55 / 51°F 82% 1021 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 36%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 15
May
01:00

NNE
NNE

13 / 17 mph 52 / 48°F 82% 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
04:00

N
N

13 / 19 mph 50 / 45°F 83% 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
07:00

N
N

14 / 22 mph 50 / 45°F 79% 1021 mb
Low level cloud: 51%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

N
N

16 / 20 mph 54 / 48°F 73% 1022 mb
Low level cloud: 57%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

N
N

16 / 18 mph 56 / 51°F 72% 1022 mb
Low level cloud: 88%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

N
N

15 / 17 mph 56 / 52°F 72% 1022 mb
Low level cloud: 81%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

14 / 16 mph 55 / 50°F 76% 1023 mb
Low level cloud: 54%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

13 / 20 mph 52 / 48°F 90% 1023 mb
Low level cloud: 20%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 16
May
01:00

NE
NE

14 / 26 mph 52 / 47°F 85% 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
04:00

ENE
ENE

13 / 22 mph 51 / 46°F 81% 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
07:00

ENE
ENE

13 / 21 mph 51 / 45°F 75% 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
10:00

NE
NE

13 / 21 mph 55 / 51°F 66% 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
13:00

NNE
NNE

16 / 19 mph 58 / 54°F 67% 1026 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
16:00

NNE
NNE

17 / 19 mph 59 / 55°F 62% 1026 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
19:00

NNE
NNE

13 / 16 mph 57 / 53°F 70% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

12 / 13 mph 55 / 52°F 81% 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
Sat 17
May
01:00

N
N

10 / 13 mph 53 / 50°F 85% 1026 mb
Low level cloud: 1%
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
04:00

N
N

10 / 14 mph 51 / 48°F 87% 1026 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
07:00

N
N

11 / 17 mph 51 / 46°F 83% 1026 mb
Low level cloud: 8%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

N
N

12 / 15 mph 55 / 50°F 79% 1026 mb
Low level cloud: 8%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

N
N

14 / 16 mph 58 / 54°F 76% 1026 mb
Low level cloud: 85%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

N
N

14 / 16 mph 58 / 55°F 71% 1025 mb
Low level cloud: 20%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

15 / 18 mph 56 / 51°F 79% 1025 mb
Low level cloud: 52%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

13 / 17 mph 53 / 49°F 87% 1025 mb
Low level cloud: 14%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 18
May
01:00

NNE
NNE

12 / 16 mph 53 / 49°F 85% 1025 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

10 / 14 mph 52 / 49°F 84% 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
07:00

NNE
NNE

9 / 16 mph 51 / 47°F 77% 1025 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNE
NNE

9 / 13 mph 55 / 52°F 67% 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
13:00

NNE
NNE

11 / 12 mph 59 / 56°F 66% 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
16:00

NNE
NNE

11 / 13 mph 59 / 56°F 70% 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
19:00

NNE
NNE

11 / 13 mph 59 / 56°F 78% 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
22:00

NE
NE

11 / 13 mph 56 / 53°F 88% 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
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 19
May
01:00

N
N

7 / 13 mph 58 / 56°F 84% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

WSW
WSW

10 / 20 mph 56 / 54°F 83% 1025 mb
Low level cloud: 0%
Mid level cloud: 54%
High level cloud: 100%
Most Significant Cloud Type: medium
57%
0.0 In
13:00

NNE
NNE

13 / 26 mph 60 / 60°F 71% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
19:00

N
N

3 / 6 mph 67 / 67°F 65% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Tue 20
May
01:00

ENE
ENE

18 / 38 mph 57 / 53°F 78% 1015 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 21%
Most Significant Cloud Type: medium
13%
0.0 In
07:00

NNE
NNE

11 / 21 mph 52 / 48°F 84% 1027 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
9%
0.0 In
13:00

ESE
ESE

6 / 11 mph 67 / 67°F 61% 1012 mb
Low level cloud: 74%
Mid level cloud: 55%
High level cloud: 67%
Most Significant Cloud Type: low
100%
0.0 In
19:00

NE
NE

14 / 30 mph 68 / 68°F 69% 1019 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
Wed 21
May
01:00

SW
SW

1 / 1 mph 60 / 60°F 98% 1013 mb
Low level cloud: 68%
Mid level cloud: 33%
High level cloud: 1%
Most Significant Cloud Type: low
79%
0.3 In
07:00

E
E

9 / 20 mph 59 / 57°F 71% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 87%
Most Significant Cloud Type: high
87%
0.0 In
13:00

W
W

3 / 6 mph 61 / 61°F 88% 1015 mb
Low level cloud: 80%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
89%
0.1 In
19:00

ESE
ESE

2 / 5 mph 62 / 62°F 96% 1014 mb
Low level cloud: 47%
Mid level cloud: 92%
High level cloud: 74%
Most Significant Cloud Type: low
88%
0.2 In
Thu 22
May
01:00

SSW
SSW

7 / 14 mph 55 / 53°F 84% 1014 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
0.1 In
07:00

WSW
WSW

6 / 13 mph 58 / 57°F 95% 1015 mb
Low level cloud: 77%
Mid level cloud: 97%
High level cloud: 81%
Most Significant Cloud Type: low
100%
0.1 In
13:00

SSE
SSE

6 / 13 mph 64 / 64°F 67% 1013 mb
Low level cloud: 14%
Mid level cloud: 65%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
19:00

NNE
NNE

9 / 18 mph 57 / 55°F 78% 1017 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
Fri 23
May
01:00

SSE
SSE

11 / 23 mph 54 / 51°F 94% 1010 mb
Low level cloud: 10%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.3 In
07:00

NNW
NNW

8 / 17 mph 52 / 49°F 81% 1018 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: low
4%
0.0 In
13:00

WSW
WSW

17 / 36 mph 59 / 59°F 65% 1010 mb
Low level cloud: 12%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
18%
0.1 In
19:00

ENE
ENE

3 / 6 mph 60 / 60°F 67% 1016 mb
Low level cloud: 0%
Mid level cloud: 72%
High level cloud: 100%
Most Significant Cloud Type: medium
75%
0.0 In
Sat 24
May
01:00

SSW
SSW

7 / 14 mph 55 / 53°F 91% 1010 mb
Low level cloud: 55%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: low
77%
0.0 In
07:00

SSW
SSW

6 / 14 mph 57 / 56°F 70% 1014 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
13:00

W
W

8 / 17 mph 58 / 57°F 71% 1012 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 78%
Most Significant Cloud Type: medium
46%
0.0 In
19:00

WNW
WNW

5 / 11 mph 67 / 67°F 75% 1012 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 10%
Most Significant Cloud Type: medium
6%
0.0 In
Sun 25
May
01:00

E
E

11 / 22 mph 57 / 54°F 77% 1011 mb
Low level cloud: 25%
Mid level cloud: 43%
High level cloud: 10%
Most Significant Cloud Type: low
41%
0.0 In
07:00

WSW
WSW

8 / 16 mph 55 / 53°F 78% 1012 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 92%
Most Significant Cloud Type: medium
19%
0.0 In
13:00

SSE
SSE

11 / 24 mph 63 / 63°F 91% 1009 mb
Low level cloud: 27%
Mid level cloud: 65%
High level cloud: 93%
Most Significant Cloud Type: low
60%
0.0 In
19:00

NE
NE

13 / 28 mph 59 / 56°F 72% 1016 mb
Low level cloud: 49%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
76%
0.0 In
Mon 26
May
01:00

SSW
SSW

7 / 14 mph 60 / 60°F 98% 1007 mb
Low level cloud: 25%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
53%
0.3 In
07:00

E
E

1 / 3 mph 56 / 56°F 64% 1017 mb
Low level cloud: 0%
Mid level cloud: 42%
High level cloud: 29%
Most Significant Cloud Type: medium
43%
0.0 In
13:00

WSW
WSW

11 / 23 mph 63 / 63°F 69% 1011 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.2 In
19:00

NW
NW

2 / 5 mph 64 / 64°F 60% 1013 mb
Low level cloud: 2%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
53%
0.0 In
Tue 27
May
01:00

SE
SE

3 / 6 mph 61 / 61°F 92% 1013 mb
Low level cloud: 2%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
0.0 In
07:00

WSW
WSW

16 / 33 mph 56 / 52°F 82% 1010 mb
Low level cloud: 88%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
13:00

SSW
SSW

2 / 5 mph 72 / 76°F 72% 1014 mb
Low level cloud: 11%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
17%
0.0 In
19:00

W
W

11 / 23 mph 57 / 54°F 79% 1011 mb
Low level cloud: 56%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
75%
0.0 In

Other Locations Near to Dunkerque

The day label given represents the local day relative to the local time for the location you are looking at.
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Day

This time is corrected for local time zones and where possible for daylight saving times.
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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.
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Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
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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.
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Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
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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.
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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.
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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.
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Pressure