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Farnham Park 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Farnham Park

Buckinghamshire, United Kingdom

Long range weather outlook for Farnham Park includes 14 day forecast summary:

The forecast for Farnham Park in the coming two weeks is predicting the average daytime maximum temperature will be around 17°C, with a high for the two weeks of 22°C expected on the afternoon of Friday 24th. The mean minimum temperature will be 10°C, dipping to its lowest on the morning of Tuesday 21st at 6°C. The coming 14 days will have some days seeing a little precipitation and some days with rain. The indicators are that Wednesday 22nd will have the most precipitation with an accumulation of around 10.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 15
May		18:00

SSE
SSE

 6 / 7 mph 66 / 64°F 69% 1005 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 6%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 4 / 7 mph 57 / 57°F 84% 1007 mb
Low level cloud: 1%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 16
May		00:00

E
E

 4 / 7 mph 54 / 53°F 89% 1006 mb
Low level cloud: 1%
Mid level cloud: 9%
High level cloud: 33%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

 3 / 6 mph 52 / 51°F 90% 1006 mb
Low level cloud: 3%
Mid level cloud: 26%
High level cloud: 100%
Most Significant Cloud Type: medium
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NE
NE

 4 / 6 mph 54 / 53°F 87% 1006 mb
Low level cloud: 14%
Mid level cloud: 85%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 6 / 8 mph 58 / 57°F 78% 1006 mb
Low level cloud: 24%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 6 / 7 mph 59 / 58°F 79% 1006 mb
Low level cloud: 32%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

 6 / 7 mph 60 / 60°F 74% 1006 mb
Low level cloud: 21%
Mid level cloud: 100%
High level cloud: 92%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

 5 / 6 mph 59 / 57°F 84% 1006 mb
Low level cloud: 8%
Mid level cloud: 46%
High level cloud: 92%
Most Significant Cloud Type: medium
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 3 / 5 mph 54 / 54°F 92% 1006 mb
Low level cloud: 18%
Mid level cloud: 41%
High level cloud: 100%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 17
May		00:00

WSW
WSW

 3 / 5 mph 53 / 53°F 93% 1006 mb
Low level cloud: 30%
Mid level cloud: 23%
High level cloud: 32%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 5 / 8 mph 50 / 48°F 96% 1007 mb
Low level cloud: 48%
Mid level cloud: 19%
High level cloud: 14%
Most Significant Cloud Type: low
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 4 / 6 mph 53 / 51°F 86% 1008 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 14%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 6 / 6 mph 63 / 61°F 66% 1009 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 8%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 6 / 7 mph 66 / 66°F 60% 1009 mb
Low level cloud: 87%
Mid level cloud: 11%
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

SSW
SSW

 5 / 7 mph 68 / 66°F 66% 1010 mb
Low level cloud: 19%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

 4 / 5 mph 68 / 65°F 76% 1011 mb
Low level cloud: 23%
Mid level cloud: 6%
High level cloud: 32%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 4 / 6 mph 57 / 57°F 90% 1013 mb
Low level cloud: 12%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May		00:00

WSW
WSW

 3 / 6 mph 54 / 54°F 93% 1013 mb
Low level cloud: 11%
Mid level cloud: 19%
High level cloud: 100%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

 3 / 6 mph 53 / 53°F 93% 1013 mb
Low level cloud: 9%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

 3 / 4 mph 57 / 56°F 89% 1013 mb
Low level cloud: 35%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 7 / 9 mph 63 / 62°F 77% 1014 mb
Low level cloud: 74%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 6 / 7 mph 70 / 67°F 60% 1014 mb
Low level cloud: 10%
Mid level cloud: 9%
High level cloud: 98%
Most Significant Cloud Type: medium
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 8 / 10 mph 69 / 67°F 68% 1013 mb
Low level cloud: 41%
Mid level cloud: 24%
High level cloud: 10%
Most Significant Cloud Type: low
50%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

NE
NE

 9 / 13 mph 65 / 63°F 83% 1014 mb
Low level cloud: 18%
Mid level cloud: 26%
High level cloud: 2%
Most Significant Cloud Type: low
27%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

NNE
NNE

 7 / 12 mph 56 / 54°F 95% 1015 mb
Low level cloud: 21%
Mid level cloud: 32%
High level cloud: 15%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May		00:00

NNE
NNE

 6 / 9 mph 54 / 52°F 94% 1015 mb
Low level cloud: 48%
Mid level cloud: 68%
High level cloud: 7%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

 6 / 9 mph 53 / 51°F 94% 1015 mb
Low level cloud: 80%
Mid level cloud: 50%
High level cloud: 0%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 8 / 11 mph 53 / 50°F 94% 1016 mb
Low level cloud: 64%
Mid level cloud: 49%
High level cloud: 0%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 10 / 13 mph 55 / 52°F 89% 1016 mb
Low level cloud: 92%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 10 / 12 mph 62 / 61°F 73% 1016 mb
Low level cloud: 82%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 12 / 16 mph 64 / 62°F 74% 1016 mb
Low level cloud: 26%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

 13 / 17 mph 61 / 60°F 82% 1016 mb
Low level cloud: 26%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 12 / 16 mph 51 / 46°F 93% 1018 mb
Low level cloud: 55%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		00:00

NE
NE

 12 / 15 mph 50 / 46°F 83% 1018 mb
Low level cloud: 99%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

 12 / 16 mph 50 / 46°F 78% 1018 mb
Low level cloud: 85%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NE
NE

 13 / 17 mph 51 / 46°F 78% 1019 mb
Low level cloud: 70%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 13 / 15 mph 56 / 52°F 65% 1019 mb
Low level cloud: 15%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 12 / 14 mph 62 / 61°F 56% 1018 mb
Low level cloud: 6%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 13 / 14 mph 63 / 62°F 56% 1017 mb
Low level cloud: 12%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

 12 / 14 mph 59 / 56°F 68% 1017 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 7%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 8 / 12 mph 50 / 46°F 82% 1018 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 1%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May		00:00

NNE
NNE

 7 / 11 mph 45 / 41°F 92% 1017 mb
Low level cloud: 14%
Mid level cloud: 20%
High level cloud: 32%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 6 / 11 mph 44 / 40°F 93% 1016 mb
Low level cloud: 34%
Mid level cloud: 93%
High level cloud: 100%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 7 / 10 mph 49 / 45°F 85% 1015 mb
Low level cloud: 9%
Mid level cloud: 21%
High level cloud: 17%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 8 / 9 mph 59 / 56°F 63% 1015 mb
Low level cloud: 40%
Mid level cloud: 32%
High level cloud: 4%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 11 / 12 mph 62 / 62°F 69% 1013 mb
Low level cloud: 86%
Mid level cloud: 55%
High level cloud: 88%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 10 / 11 mph 63 / 63°F 73% 1012 mb
Low level cloud: 84%
Mid level cloud: 45%
High level cloud: 3%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

 9 / 12 mph 61 / 60°F 88% 1012 mb
Low level cloud: 83%
Mid level cloud: 28%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 8 / 12 mph 54 / 52°F 90% 1013 mb
Low level cloud: 86%
Mid level cloud: 29%
High level cloud: 79%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 22
May		00:00

SW
SW

 7 / 15 mph 53 / 50°F 98% 1009 mb
Low level cloud: 51%
Mid level cloud: 43%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
06:00

ENE
ENE

 5 / 11 mph 53 / 52°F 90% 1012 mb
Low level cloud: 40%
Mid level cloud: 83%
High level cloud: 19%
Most Significant Cloud Type: low
71%
0.0 In
12:00

NNW
NNW

 5 / 10 mph 58 / 58°F 95% 1010 mb
Low level cloud: 99%
Mid level cloud: 44%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.0 In
18:00

N
N

 9 / 19 mph 62 / 62°F 80% 1012 mb
Low level cloud: 83%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
86%
0.0 In
Thu 23
May		00:00

NNE
NNE

 4 / 9 mph 55 / 54°F 95% 1013 mb
Low level cloud: 63%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
70%
0.0 In
06:00

SSW
SSW

 4 / 9 mph 59 / 59°F 88% 1021 mb
Low level cloud: 7%
Mid level cloud: 8%
High level cloud: 100%
Most Significant Cloud Type: medium
32%
0.0 In
12:00

NNW
NNW

 17 / 36 mph 53 / 48°F 95% 1018 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 16%
Most Significant Cloud Type: low
100%
0.0 In
18:00

E
E

 5 / 11 mph 64 / 64°F 87% 1017 mb
Low level cloud: 26%
Mid level cloud: 29%
High level cloud: 4%
Most Significant Cloud Type: low
37%
0.0 In
Fri 24
May		00:00

NE
NE

 12 / 26 mph 53 / 50°F 98% 1019 mb
Low level cloud: 98%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
06:00

NNE
NNE

 9 / 19 mph 55 / 52°F 89% 1018 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.0 In
12:00

ENE
ENE

 3 / 6 mph 62 / 62°F 90% 1021 mb
Low level cloud: 88%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
96%
0.0 In
18:00

NNE
NNE

 12 / 25 mph 65 / 65°F 70% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
0%
0.0 In
Sat 25
May		00:00

SW
SW

 4 / 8 mph 62 / 62°F 93% 1021 mb
Low level cloud: 9%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
14%
0.0 In
06:00

NNE
NNE

 9 / 18 mph 54 / 52°F 86% 1019 mb
Low level cloud: 11%
Mid level cloud: 4%
High level cloud: 23%
Most Significant Cloud Type: low
15%
0.0 In
12:00

SSW
SSW

 6 / 13 mph 70 / 70°F 61% 1019 mb
Low level cloud: 75%
Mid level cloud: 5%
High level cloud: 12%
Most Significant Cloud Type: low
78%
0.0 In
18:00

N
N

 6 / 12 mph 67 / 67°F 70% 1016 mb
Low level cloud: 11%
Mid level cloud: 20%
High level cloud: 100%
Most Significant Cloud Type: medium
54%
0.0 In
Sun 26
May		00:00

NW
NW

 3 / 7 mph 66 / 66°F 90% 1019 mb
Low level cloud: 9%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
14%
0.0 In
06:00

NNE
NNE

 5 / 11 mph 57 / 56°F 65% 1017 mb
Low level cloud: 1%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
12:00

ENE
ENE

 11 / 24 mph 74 / 77°F 65% 1017 mb
Low level cloud: 27%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
28%
0.0 In
18:00

NNW
NNW

 5 / 10 mph 71 / 71°F 67% 1017 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
7%
0.0 In
Mon 27
May		00:00

ENE
ENE

 12 / 25 mph 58 / 56°F 77% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 13%
Most Significant Cloud Type: medium
3%
0.0 In
06:00

NNW
NNW

 8 / 17 mph 53 / 51°F 78% 1019 mb
Low level cloud: 58%
Mid level cloud: 27%
High level cloud: 85%
Most Significant Cloud Type: low
78%
0.0 In
12:00

NE
NE

 18 / 38 mph 63 / 63°F 57% 1017 mb
Low level cloud: 46%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
49%
0.0 In
18:00

NW
NW

 12 / 24 mph 62 / 62°F 70% 1018 mb
Low level cloud: 3%
Mid level cloud: 13%
High level cloud: 21%
Most Significant Cloud Type: medium
21%
0.0 In
Tue 28
May		00:00

NNE
NNE

 18 / 37 mph 52 / 46°F 90% 1010 mb
Low level cloud: 96%
Mid level cloud: 54%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NW
NW

 11 / 24 mph 50 / 45°F 82% 1020 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: low
9%
0.0 In
12:00

NE
NE

 8 / 17 mph 62 / 62°F 73% 1005 mb
Low level cloud: 78%
Mid level cloud: 25%
High level cloud: 60%
Most Significant Cloud Type: low
93%
0.0 In
18:00

NW
NW

 10 / 22 mph 62 / 62°F 66% 1020 mb
Low level cloud: 7%
Mid level cloud: 3%
High level cloud: 21%
Most Significant Cloud Type: low
10%
0.0 In
Wed 29
May		00:00

NE
NE

 6 / 12 mph 59 / 58°F 94% 1007 mb
Low level cloud: 21%
Mid level cloud: 52%
High level cloud: 12%
Most Significant Cloud Type: low
40%
0.1 In
06:00

W
W

 7 / 15 mph 54 / 52°F 79% 1020 mb
Low level cloud: 2%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: medium
18%
0.0 In
12:00

SSW
SSW

 4 / 8 mph 66 / 66°F 78% 1006 mb
Low level cloud: 88%
Mid level cloud: 46%
High level cloud: 98%
Most Significant Cloud Type: low
100%
0.4 In
18:00

W
W

 13 / 28 mph 58 / 55°F 68% 1016 mb
Low level cloud: 4%
Mid level cloud: 75%
High level cloud: 100%
Most Significant Cloud Type: medium
91%
0.0 In
Thu 30
May		00:00

WSW
WSW

 4 / 8 mph 63 / 63°F 90% 1008 mb
Low level cloud: 1%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
0.0 In
06:00

W
W

 9 / 19 mph 54 / 52°F 88% 1015 mb
Low level cloud: 84%
Mid level cloud: 33%
High level cloud: 96%
Most Significant Cloud Type: low
100%
0.0 In
12:00

WSW
WSW

 7 / 15 mph 59 / 59°F 87% 1007 mb
Low level cloud: 8%
Mid level cloud: 86%
High level cloud: 64%
Most Significant Cloud Type: medium
100%
0.0 In
18:00

NW
NW

 6 / 12 mph 63 / 63°F 84% 1013 mb
Low level cloud: 58%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
77%
0.1 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