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Barrows Green 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Barrows Green

Cheshire, United Kingdom

Long range weather outlook for Barrows Green includes 14 day forecast summary:

Taking a look at Barrows Green over the coming two weeks and the average daytime maximum temperature will be around 20°C, with a high for the two weeks of 24°C expected on the afternoon of Sunday 7th. The mean minimum temperature will be 11°C, dipping to its lowest on the morning of Saturday 13th at 9°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. The indicators are that Tuesday 9th 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
Wed 03
Sep		18:00

W
W

 6 / 11 mph 63 / 61°F 83% 994 mb
Low level cloud: 39%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 10 / 18 mph 55 / 53°F 92% 998 mb
Low level cloud: 24%
Mid level cloud: 22%
High level cloud: 21%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 04
Sep		00:00

SSW
SSW

 7 / 14 mph 53 / 50°F 94% 1000 mb
Low level cloud: 5%
Mid level cloud: 22%
High level cloud: 6%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 8 / 16 mph 50 / 47°F 95% 1001 mb
Low level cloud: 8%
Mid level cloud: 29%
High level cloud: 11%
Most Significant Cloud Type: medium
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

 5 / 11 mph 49 / 47°F 96% 1002 mb
Low level cloud: 18%
Mid level cloud: 28%
High level cloud: 72%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 3 / 4 mph 57 / 56°F 87% 1003 mb
Low level cloud: 20%
Mid level cloud: 55%
High level cloud: 100%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

 6 / 8 mph 58 / 56°F 88% 1004 mb
Low level cloud: 31%
Mid level cloud: 57%
High level cloud: 100%
Most Significant Cloud Type: low
62%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

WNW
WNW

 11 / 14 mph 63 / 62°F 70% 1006 mb
Low level cloud: 54%
Mid level cloud: 24%
High level cloud: 26%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 8 / 11 mph 61 / 59°F 82% 1008 mb
Low level cloud: 9%
Mid level cloud: 13%
High level cloud: 19%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 6 / 12 mph 53 / 51°F 91% 1011 mb
Low level cloud: 11%
Mid level cloud: 8%
High level cloud: 6%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 05
Sep		00:00

SW
SW

 6 / 13 mph 51 / 48°F 92% 1013 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

 5 / 11 mph 49 / 47°F 93% 1015 mb
Low level cloud: 4%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

 5 / 10 mph 49 / 47°F 94% 1017 mb
Low level cloud: 16%
Mid level cloud: 7%
High level cloud: 42%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

 8 / 9 mph 61 / 60°F 72% 1019 mb
Low level cloud: 23%
Mid level cloud: 12%
High level cloud: 13%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

 6 / 7 mph 69 / 67°F 48% 1019 mb
Low level cloud: 59%
Mid level cloud: 11%
High level cloud: 30%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 8 / 9 mph 71 / 69°F 41% 1018 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 21%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

 6 / 9 mph 66 / 64°F 57% 1020 mb
Low level cloud: 2%
Mid level cloud: 17%
High level cloud: 100%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 4 / 8 mph 56 / 55°F 78% 1020 mb
Low level cloud: 11%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 06
Sep		00:00

SSE
SSE

 4 / 7 mph 54 / 54°F 81% 1020 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 5 / 11 mph 52 / 51°F 81% 1018 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

 6 / 13 mph 52 / 50°F 81% 1017 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 56%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 11 / 12 mph 63 / 61°F 67% 1017 mb
Low level cloud: 7%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

 14 / 16 mph 69 / 69°F 51% 1015 mb
Low level cloud: 1%
Mid level cloud: 96%
High level cloud: 66%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 15 / 18 mph 72 / 76°F 47% 1012 mb
Low level cloud: 14%
Mid level cloud: 49%
High level cloud: 100%
Most Significant Cloud Type: medium
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

 15 / 23 mph 69 / 67°F 51% 1010 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
21:00

ESE
ESE

 19 / 30 mph 65 / 65°F 51% 1009 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 94%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 07
Sep		00:00

SE
SE

 21 / 34 mph 65 / 65°F 53% 1006 mb
Low level cloud: 0%
Mid level cloud: 53%
High level cloud: 20%
Most Significant Cloud Type: medium
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 18 / 30 mph 65 / 65°F 48% 1004 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 78%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

 17 / 26 mph 64 / 64°F 57% 1003 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 99%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

 17 / 23 mph 68 / 68°F 59% 1004 mb
Low level cloud: 0%
Mid level cloud: 42%
High level cloud: 100%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 21 / 24 mph 76 / 78°F 55% 1004 mb
Low level cloud: 13%
Mid level cloud: 46%
High level cloud: 59%
Most Significant Cloud Type: medium
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

 17 / 23 mph 69 / 68°F 69% 1005 mb
Low level cloud: 41%
Mid level cloud: 95%
High level cloud: 77%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 11 / 15 mph 65 / 64°F 84% 1007 mb
Low level cloud: 2%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

 9 / 14 mph 59 / 59°F 91% 1010 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
Mon 08
Sep		00:00

S
S

 7 / 15 mph 54 / 52°F 93% 1011 mb
Low level cloud: 3%
Mid level cloud: 35%
High level cloud: 0%
Most Significant Cloud Type: medium
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 9 / 17 mph 53 / 50°F 94% 1011 mb
Low level cloud: 17%
Mid level cloud: 39%
High level cloud: 0%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

 9 / 17 mph 53 / 50°F 96% 1012 mb
Low level cloud: 28%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 15 / 17 mph 63 / 63°F 62% 1013 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 17 / 19 mph 71 / 70°F 42% 1012 mb
Low level cloud: 6%
Mid level cloud: 46%
High level cloud: 5%
Most Significant Cloud Type: medium
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

 14 / 18 mph 69 / 68°F 47% 1011 mb
Low level cloud: 1%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

 13 / 19 mph 67 / 66°F 51% 1011 mb
Low level cloud: 6%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 12 / 19 mph 60 / 60°F 69% 1011 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 10%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 09
Sep		00:00

SE
SE

 13 / 22 mph 57 / 55°F 76% 1010 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 11%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

 15 / 23 mph 57 / 54°F 75% 1009 mb
Low level cloud: 2%
Mid level cloud: 23%
High level cloud: 5%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

 15 / 23 mph 56 / 53°F 81% 1007 mb
Low level cloud: 47%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 17 / 21 mph 61 / 61°F 71% 1007 mb
Low level cloud: 79%
Mid level cloud: 44%
High level cloud: 16%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

 13 / 17 mph 59 / 55°F 85% 1006 mb
Low level cloud: 3%
Mid level cloud: 23%
High level cloud: 100%
Most Significant Cloud Type: medium
35%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

SSE
SSE

 18 / 21 mph 64 / 63°F 66% 1003 mb
Low level cloud: 56%
Mid level cloud: 42%
High level cloud: 6%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

 16 / 25 mph 57 / 53°F 90% 1001 mb
Low level cloud: 51%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: low
69%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
21:00

S
S

 16 / 26 mph 56 / 52°F 91% 1000 mb
Low level cloud: 60%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
75%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 10
Sep		00:00

W
W

 2 / 4 mph 64 / 64°F 63% 1016 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 71%
Most Significant Cloud Type: medium
18%
0.0 In
06:00

SW
SW

 5 / 10 mph 54 / 53°F 93% 1011 mb
Low level cloud: 93%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSW
SSW

 19 / 40 mph 70 / 70°F 46% 1009 mb
Low level cloud: 17%
Mid level cloud: 82%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
18:00

SSW
SSW

 5 / 11 mph 68 / 68°F 97% 1005 mb
Low level cloud: 97%
Mid level cloud: 70%
High level cloud: 4%
Most Significant Cloud Type: low
100%
0.0 In
Thu 11
Sep		00:00

S
S

 7 / 15 mph 56 / 54°F 93% 1014 mb
Low level cloud: 6%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: medium
38%
0.0 In
06:00

SSW
SSW

 4 / 9 mph 54 / 53°F 94% 1014 mb
Low level cloud: 1%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
0.0 In
12:00

SW
SW

 9 / 17 mph 70 / 70°F 38% 1016 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
0.0 In
18:00

SW
SW

 13 / 28 mph 63 / 63°F 68% 1009 mb
Low level cloud: 2%
Mid level cloud: 12%
High level cloud: 1%
Most Significant Cloud Type: medium
16%
0.0 In
Fri 12
Sep		00:00

S
S

 18 / 38 mph 58 / 54°F 73% 1001 mb
Low level cloud: 76%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
96%
0.0 In
06:00

S
S

 7 / 15 mph 48 / 45°F 95% 1012 mb
Low level cloud: 34%
Mid level cloud: 15%
High level cloud: 4%
Most Significant Cloud Type: low
39%
0.0 In
12:00

WSW
WSW

 11 / 22 mph 63 / 63°F 63% 1006 mb
Low level cloud: 78%
Mid level cloud: 29%
High level cloud: 1%
Most Significant Cloud Type: low
87%
0.0 In
18:00

WNW
WNW

 8 / 17 mph 59 / 57°F 90% 1019 mb
Low level cloud: 12%
Mid level cloud: 15%
High level cloud: 3%
Most Significant Cloud Type: low
17%
0.1 In
Sat 13
Sep		00:00

WSW
WSW

 6 / 13 mph 55 / 53°F 94% 1014 mb
Low level cloud: 5%
Mid level cloud: 11%
High level cloud: 2%
Most Significant Cloud Type: low
9%
0.0 In
06:00

SSW
SSW

 6 / 13 mph 50 / 47°F 95% 1024 mb
Low level cloud: 30%
Mid level cloud: 10%
High level cloud: 92%
Most Significant Cloud Type: low
44%
0.0 In
12:00

SW
SW

 15 / 30 mph 64 / 64°F 49% 1016 mb
Low level cloud: 71%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: low
89%
0.0 In
18:00

SSW
SSW

 15 / 31 mph 61 / 61°F 72% 1023 mb
Low level cloud: 98%
Mid level cloud: 55%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.0 In
Sun 14
Sep		00:00

SSW
SSW

 15 / 32 mph 61 / 61°F 94% 1012 mb
Low level cloud: 100%
Mid level cloud: 56%
High level cloud: 98%
Most Significant Cloud Type: low
100%
0.2 In
06:00

SSW
SSW

 20 / 42 mph 60 / 60°F 84% 1021 mb
Low level cloud: 54%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
73%
0.0 In
12:00

SW
SW

 10 / 21 mph 55 / 53°F 94% 1012 mb
Low level cloud: 49%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: low
95%
0.3 In
18:00

SW
SW

 12 / 26 mph 65 / 65°F 94% 1022 mb
Low level cloud: 98%
Mid level cloud: 88%
High level cloud: 34%
Most Significant Cloud Type: low
100%
0.2 In
Mon 15
Sep		00:00

SW
SW

 8 / 16 mph 52 / 50°F 95% 1015 mb
Low level cloud: 11%
Mid level cloud: 44%
High level cloud: 22%
Most Significant Cloud Type: medium
75%
0.0 In
06:00

WSW
WSW

 1 / 2 mph 58 / 58°F 97% 1028 mb
Low level cloud: 62%
Mid level cloud: 57%
High level cloud: 92%
Most Significant Cloud Type: low
92%
0.5 In
12:00

WSW
WSW

 13 / 27 mph 65 / 65°F 46% 1017 mb
Low level cloud: 10%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
11%
0.0 In
18:00

SSE
SSE

 6 / 12 mph 63 / 63°F 84% 1026 mb
Low level cloud: 63%
Mid level cloud: 53%
High level cloud: 100%
Most Significant Cloud Type: low
93%
0.0 In
Tue 16
Sep		00:00

S
S

 6 / 13 mph 55 / 54°F 92% 1015 mb
Low level cloud: 5%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: medium
33%
0.0 In
06:00

S
S

 8 / 17 mph 60 / 60°F 96% 1022 mb
Low level cloud: 71%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
81%
0.0 In
12:00

WSW
WSW

 10 / 21 mph 59 / 59°F 85% 1010 mb
Low level cloud: 41%
Mid level cloud: 90%
High level cloud: 7%
Most Significant Cloud Type: low
73%
0.1 In
18:00

SW
SW

 13 / 27 mph 65 / 65°F 82% 1019 mb
Low level cloud: 93%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
94%
0.0 In
Wed 17
Sep		00:00

WSW
WSW

 7 / 15 mph 51 / 49°F 87% 1016 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
06:00

SW
SW

 6 / 12 mph 55 / 53°F 93% 1020 mb
Low level cloud: 94%
Mid level cloud: 32%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.0 In
12:00

W
W

 16 / 34 mph 62 / 62°F 47% 1019 mb
Low level cloud: 16%
Mid level cloud: 46%
High level cloud: 16%
Most Significant Cloud Type: medium
92%
0.0 In
18:00

NW
NW

 6 / 12 mph 65 / 65°F 67% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 21%
Most Significant Cloud Type: high
20%
0.0 In
Thu 18
Sep		00:00

SSW
SSW

 6 / 13 mph 51 / 49°F 90% 1026 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 16%
Most Significant Cloud Type: medium
7%
0.0 In
06:00

SSW
SSW

 5 / 10 mph 49 / 48°F 90% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 16%
Most Significant Cloud Type: high
15%
0.0 In
12:00

S
S

 11 / 22 mph 63 / 62°F 52% 1024 mb
Low level cloud: 2%
Mid level cloud: 43%
High level cloud: 98%
Most Significant Cloud Type: medium
52%
0.0 In
18:00

NW
NW

 7 / 14 mph 57 / 56°F 72% 1027 mb
Low level cloud: 10%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: medium
78%
0.0 In

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