Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Strugg's Hill 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Strugg's Hill

Lincolnshire, United Kingdom

Long range weather outlook for Strugg's Hill includes 14 day forecast summary:

Reviewing the forecast for Strugg's Hill Over the next 14 days and the average daytime maximum temperature will be around 16°C, with a high for the two weeks of 21°C expected on the afternoon of Sunday 2nd. The average minimum temperature will be 7°C, dipping to its lowest on the morning of Wednesday 5th at 4°C. The coming 14 days will have some days seeing a little precipitation and some days with rain. Current predictions suggest Sunday 9th will have the most precipitation with an accumulation of around 3.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 02
Jun		21:00

NW
NW

 4 / 7 mph 57 / 57°F 90% 1024 mb
Low level cloud: 93%
Mid level cloud: 5%
High level cloud: 10%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 03
Jun		00:00

WNW
WNW

 8 / 16 mph 53 / 50°F 96% 1023 mb
Low level cloud: 23%
Mid level cloud: 29%
High level cloud: 31%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

 8 / 15 mph 51 / 48°F 97% 1022 mb
Low level cloud: 29%
Mid level cloud: 14%
High level cloud: 99%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

 9 / 12 mph 56 / 52°F 92% 1021 mb
Low level cloud: 48%
Mid level cloud: 19%
High level cloud: 100%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

 9 / 11 mph 60 / 60°F 82% 1021 mb
Low level cloud: 95%
Mid level cloud: 51%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WNW
WNW

 9 / 11 mph 63 / 63°F 77% 1020 mb
Low level cloud: 82%
Mid level cloud: 16%
High level cloud: 96%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

 9 / 12 mph 64 / 64°F 75% 1020 mb
Low level cloud: 89%
Mid level cloud: 7%
High level cloud: 78%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 4 / 6 mph 62 / 61°F 86% 1019 mb
Low level cloud: 92%
Mid level cloud: 3%
High level cloud: 21%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

 6 / 11 mph 58 / 56°F 86% 1018 mb
Low level cloud: 81%
Mid level cloud: 0%
High level cloud: 81%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 04
Jun		00:00

W
W

 7 / 13 mph 51 / 49°F 95% 1017 mb
Low level cloud: 8%
Mid level cloud: 2%
High level cloud: 83%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

 6 / 12 mph 49 / 47°F 94% 1014 mb
Low level cloud: 40%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 7 / 12 mph 55 / 53°F 90% 1012 mb
Low level cloud: 86%
Mid level cloud: 15%
High level cloud: 32%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 12 / 17 mph 57 / 54°F 89% 1010 mb
Low level cloud: 99%
Mid level cloud: 80%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 15 / 21 mph 57 / 54°F 89% 1008 mb
Low level cloud: 81%
Mid level cloud: 94%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 18 / 28 mph 58 / 54°F 90% 1006 mb
Low level cloud: 71%
Mid level cloud: 74%
High level cloud: 6%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 15 / 23 mph 57 / 52°F 88% 1007 mb
Low level cloud: 47%
Mid level cloud: 44%
High level cloud: 13%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 7 / 12 mph 50 / 46°F 88% 1009 mb
Low level cloud: 1%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 05
Jun		00:00

W
W

 9 / 17 mph 44 / 39°F 93% 1011 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

 8 / 17 mph 41 / 35°F 91% 1011 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

 9 / 14 mph 46 / 41°F 86% 1013 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

 13 / 16 mph 54 / 50°F 65% 1013 mb
Low level cloud: 31%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

 13 / 16 mph 56 / 52°F 63% 1014 mb
Low level cloud: 18%
Mid level cloud: 99%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 13 / 17 mph 57 / 53°F 64% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 15%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 8 / 12 mph 56 / 53°F 72% 1015 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 8 / 17 mph 48 / 44°F 82% 1016 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 28%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 06
Jun		00:00

WSW
WSW

 7 / 15 mph 44 / 39°F 90% 1016 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

 7 / 14 mph 41 / 37°F 93% 1016 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 12%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

 7 / 10 mph 48 / 43°F 85% 1016 mb
Low level cloud: 4%
Mid level cloud: 26%
High level cloud: 20%
Most Significant Cloud Type: medium
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 8 / 9 mph 56 / 52°F 70% 1016 mb
Low level cloud: 35%
Mid level cloud: 41%
High level cloud: 45%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 9 / 11 mph 57 / 55°F 65% 1015 mb
Low level cloud: 62%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

 12 / 16 mph 61 / 59°F 61% 1013 mb
Low level cloud: 42%
Mid level cloud: 60%
High level cloud: 0%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

 12 / 19 mph 57 / 53°F 82% 1012 mb
Low level cloud: 45%
Mid level cloud: 46%
High level cloud: 20%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 12 / 21 mph 52 / 47°F 87% 1012 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 07
Jun		00:00

SSW
SSW

 14 / 23 mph 50 / 45°F 79% 1010 mb
Low level cloud: 90%
Mid level cloud: 97%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 15 / 23 mph 52 / 47°F 81% 1009 mb
Low level cloud: 72%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 13 / 19 mph 54 / 49°F 90% 1009 mb
Low level cloud: 88%
Mid level cloud: 11%
High level cloud: 1%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

 16 / 20 mph 56 / 52°F 72% 1010 mb
Low level cloud: 88%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 19 / 22 mph 58 / 54°F 64% 1010 mb
Low level cloud: 86%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

 17 / 23 mph 58 / 53°F 73% 1010 mb
Low level cloud: 29%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 14 / 20 mph 55 / 51°F 79% 1011 mb
Low level cloud: 1%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 9 / 19 mph 47 / 42°F 90% 1012 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 08
Jun		00:00

WSW
WSW

 10 / 20 mph 43 / 38°F 93% 1013 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

 13 / 24 mph 44 / 37°F 85% 1013 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

 15 / 20 mph 48 / 41°F 83% 1013 mb
Low level cloud: 5%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

 20 / 24 mph 55 / 49°F 69% 1013 mb
Low level cloud: 56%
Mid level cloud: 16%
High level cloud: 1%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

 24 / 30 mph 57 / 51°F 72% 1013 mb
Low level cloud: 14%
Mid level cloud: 31%
High level cloud: 6%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 23 / 28 mph 59 / 55°F 71% 1013 mb
Low level cloud: 18%
Mid level cloud: 10%
High level cloud: 3%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 18 / 30 mph 55 / 49°F 83% 1014 mb
Low level cloud: 14%
Mid level cloud: 31%
High level cloud: 69%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

 15 / 27 mph 50 / 44°F 86% 1016 mb
Low level cloud: 11%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 09
Jun		00:00

ENE
ENE

 9 / 17 mph 52 / 49°F 94% 1020 mb
Low level cloud: 15%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
06:00

NE
NE

 5 / 7 mph 54 / 52°F 83% 1022 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 19%
Most Significant Cloud Type: medium
10%
0.0 In
12:00

ESE
ESE

 6 / 11 mph 64 / 64°F 68% 1025 mb
Low level cloud: 34%
Mid level cloud: 8%
High level cloud: 18%
Most Significant Cloud Type: low
38%
0.0 In
18:00

WNW
WNW

 7 / 13 mph 62 / 62°F 79% 1015 mb
Low level cloud: 45%
Mid level cloud: 54%
High level cloud: 7%
Most Significant Cloud Type: low
64%
0.0 In
Mon 10
Jun		00:00

NNW
NNW

 6 / 13 mph 45 / 42°F 93% 1017 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
06:00

WNW
WNW

 14 / 30 mph 47 / 41°F 88% 1006 mb
Low level cloud: 56%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
58%
0.0 In
12:00

W
W

 17 / 34 mph 58 / 55°F 83% 1017 mb
Low level cloud: 70%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
79%
0.0 In
18:00

ESE
ESE

 4 / 9 mph 63 / 63°F 78% 1016 mb
Low level cloud: 41%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
48%
0.0 In
Tue 11
Jun		00:00

W
W

 11 / 23 mph 51 / 46°F 95% 1018 mb
Low level cloud: 32%
Mid level cloud: 31%
High level cloud: 4%
Most Significant Cloud Type: low
43%
0.0 In
06:00

NNW
NNW

 7 / 15 mph 50 / 47°F 87% 1020 mb
Low level cloud: 32%
Mid level cloud: 84%
High level cloud: 53%
Most Significant Cloud Type: low
67%
0.0 In
12:00

W
W

 3 / 7 mph 58 / 59°F 75% 1021 mb
Low level cloud: 77%
Mid level cloud: 19%
High level cloud: 16%
Most Significant Cloud Type: low
85%
0.0 In
18:00

E
E

 8 / 16 mph 55 / 53°F 79% 1021 mb
Low level cloud: 77%
Mid level cloud: 46%
High level cloud: 42%
Most Significant Cloud Type: low
98%
0.0 In
Wed 12
Jun		00:00

WNW
WNW

 4 / 9 mph 51 / 50°F 94% 1021 mb
Low level cloud: 11%
Mid level cloud: 21%
High level cloud: 48%
Most Significant Cloud Type: low
24%
0.0 In
06:00

WSW
WSW

 5 / 11 mph 52 / 51°F 74% 1018 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 7%
Most Significant Cloud Type: medium
45%
0.0 In
12:00

WSW
WSW

 6 / 13 mph 60 / 60°F 71% 1019 mb
Low level cloud: 5%
Mid level cloud: 44%
High level cloud: 98%
Most Significant Cloud Type: medium
60%
0.0 In
18:00

NNE
NNE

 5 / 10 mph 56 / 56°F 91% 1014 mb
Low level cloud: 95%
Mid level cloud: 89%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
Thu 13
Jun		00:00

W
W

 8 / 17 mph 53 / 51°F 94% 1015 mb
Low level cloud: 91%
Mid level cloud: 93%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
06:00

SW
SW

 3 / 6 mph 55 / 55°F 91% 1013 mb
Low level cloud: 54%
Mid level cloud: 83%
High level cloud: 100%
Most Significant Cloud Type: low
94%
0.0 In
12:00

SW
SW

 9 / 18 mph 56 / 54°F 86% 1011 mb
Low level cloud: 87%
Mid level cloud: 55%
High level cloud: 9%
Most Significant Cloud Type: low
100%
0.1 In
18:00

W
W

 8 / 16 mph 57 / 55°F 85% 1011 mb
Low level cloud: 43%
Mid level cloud: 45%
High level cloud: 20%
Most Significant Cloud Type: low
60%
0.1 In
Fri 14
Jun		00:00

NNE
NNE

 1 / 2 mph 53 / 53°F 98% 1008 mb
Low level cloud: 74%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
90%
0.0 In
06:00

WNW
WNW

 5 / 11 mph 53 / 51°F 92% 1013 mb
Low level cloud: 50%
Mid level cloud: 23%
High level cloud: 37%
Most Significant Cloud Type: low
62%
0.0 In
12:00

ESE
ESE

 7 / 15 mph 60 / 60°F 79% 1011 mb
Low level cloud: 25%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
31%
0.0 In
18:00

SSW
SSW

 9 / 19 mph 58 / 56°F 95% 1009 mb
Low level cloud: 88%
Mid level cloud: 71%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
Sat 15
Jun		00:00

SSE
SSE

 9 / 18 mph 57 / 55°F 95% 1010 mb
Low level cloud: 58%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SW
SW

 10 / 20 mph 51 / 47°F 94% 1005 mb
Low level cloud: 43%
Mid level cloud: 57%
High level cloud: 100%
Most Significant Cloud Type: low
75%
0.0 In
12:00

SSW
SSW

 13 / 28 mph 63 / 63°F 87% 1010 mb
Low level cloud: 52%
Mid level cloud: 63%
High level cloud: 100%
Most Significant Cloud Type: low
85%
0.1 In
18:00

N
N

 14 / 30 mph 57 / 54°F 87% 1010 mb
Low level cloud: 12%
Mid level cloud: 17%
High level cloud: 18%
Most Significant Cloud Type: low
19%
0.1 In
Sun 16
Jun		00:00

SSW
SSW

 12 / 25 mph 60 / 60°F 96% 1012 mb
Low level cloud: 48%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
51%
0.0 In
06:00

W
W

 3 / 7 mph 50 / 49°F 80% 1015 mb
Low level cloud: 65%
Mid level cloud: 46%
High level cloud: 1%
Most Significant Cloud Type: low
81%
0.0 In
12:00

SSW
SSW

 11 / 22 mph 67 / 67°F 63% 1016 mb
Low level cloud: 8%
Mid level cloud: 25%
High level cloud: 99%
Most Significant Cloud Type: medium
52%
0.0 In
18:00

SSW
SSW

 7 / 15 mph 58 / 56°F 88% 1015 mb
Low level cloud: 13%
Mid level cloud: 31%
High level cloud: 45%
Most Significant Cloud Type: low
29%
0.1 In
Mon 17
Jun		00:00

ENE
ENE

 4 / 8 mph 60 / 60°F 85% 1016 mb
Low level cloud: 41%
Mid level cloud: 45%
High level cloud: 20%
Most Significant Cloud Type: low
58%
0.0 In
06:00

SSW
SSW

 7 / 15 mph 53 / 51°F 94% 1015 mb
Low level cloud: 44%
Mid level cloud: 46%
High level cloud: 6%
Most Significant Cloud Type: low
60%
0.0 In
12:00

SE
SE

 4 / 9 mph 68 / 68°F 91% 1010 mb
Low level cloud: 96%
Mid level cloud: 43%
High level cloud: 99%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SSW
SSW

 4 / 9 mph 60 / 60°F 84% 1013 mb
Low level cloud: 0%
Mid level cloud: 90%
High level cloud: 96%
Most Significant Cloud Type: medium
93%
0.0 In

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