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Hengrove Park 14 Day Long Range Forecast

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

City of Bristol, United Kingdom

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

Taking a look at Hengrove Park over the coming two weeks and the average daytime maximum temperature will be around 21°C, with a high for the two weeks of 25°C expected on the afternoon of Sunday 7th. The mean minimum temperature will be 13°C, dipping to its lowest on the morning of Tuesday 2nd at 10°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. It looks like Wednesday 3rd 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
Fri 29
Aug		18:00

W
W

 15 / 20 mph 65 / 64°F 69% 999 mb
Low level cloud: 13%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 9 / 15 mph 59 / 59°F 84% 1001 mb
Low level cloud: 2%
Mid level cloud: 11%
High level cloud: 15%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 30
Aug		00:00

SW
SW

 6 / 11 mph 58 / 57°F 90% 1002 mb
Low level cloud: 5%
Mid level cloud: 14%
High level cloud: 22%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 5 / 10 mph 56 / 55°F 92% 1003 mb
Low level cloud: 40%
Mid level cloud: 18%
High level cloud: 1%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

 6 / 11 mph 54 / 53°F 94% 1003 mb
Low level cloud: 54%
Mid level cloud: 11%
High level cloud: 3%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 13 / 15 mph 66 / 65°F 65% 1003 mb
Low level cloud: 40%
Mid level cloud: 23%
High level cloud: 10%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 16 / 19 mph 70 / 70°F 57% 1001 mb
Low level cloud: 91%
Mid level cloud: 44%
High level cloud: 83%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

 19 / 26 mph 63 / 63°F 94% 999 mb
Low level cloud: 97%
Mid level cloud: 74%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

SSW
SSW

 19 / 28 mph 63 / 63°F 95% 998 mb
Low level cloud: 99%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 15 / 23 mph 60 / 60°F 87% 1000 mb
Low level cloud: 38%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 31
Aug		00:00

SW
SW

 14 / 22 mph 56 / 52°F 91% 1002 mb
Low level cloud: 45%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 12 / 19 mph 54 / 50°F 91% 1002 mb
Low level cloud: 25%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 11 / 18 mph 54 / 50°F 91% 1002 mb
Low level cloud: 20%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 17 / 21 mph 63 / 62°F 75% 1002 mb
Low level cloud: 58%
Mid level cloud: 37%
High level cloud: 0%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 18 / 22 mph 70 / 70°F 44% 1001 mb
Low level cloud: 4%
Mid level cloud: 80%
High level cloud: 0%
Most Significant Cloud Type: medium
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 19 / 25 mph 66 / 65°F 57% 1001 mb
Low level cloud: 26%
Mid level cloud: 78%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 18 / 25 mph 61 / 61°F 76% 1001 mb
Low level cloud: 4%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 15 / 23 mph 57 / 54°F 84% 1000 mb
Low level cloud: 18%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 01
Sep		00:00

S
S

 15 / 24 mph 57 / 53°F 88% 1000 mb
Low level cloud: 25%
Mid level cloud: 44%
High level cloud: 31%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 16 / 25 mph 57 / 54°F 91% 998 mb
Low level cloud: 26%
Mid level cloud: 43%
High level cloud: 82%
Most Significant Cloud Type: low
50%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

SSW
SSW

 13 / 21 mph 57 / 54°F 93% 998 mb
Low level cloud: 45%
Mid level cloud: 60%
High level cloud: 38%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 16 / 23 mph 59 / 59°F 87% 999 mb
Low level cloud: 77%
Mid level cloud: 45%
High level cloud: 38%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 19 / 25 mph 63 / 62°F 78% 1000 mb
Low level cloud: 43%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

 19 / 26 mph 63 / 63°F 79% 1001 mb
Low level cloud: 87%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 15 / 25 mph 60 / 59°F 83% 1002 mb
Low level cloud: 85%
Mid level cloud: 15%
High level cloud: 45%
Most Significant Cloud Type: low
96%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

WSW
WSW

 12 / 19 mph 58 / 55°F 86% 1004 mb
Low level cloud: 77%
Mid level cloud: 22%
High level cloud: 70%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 02
Sep		00:00

SW
SW

 9 / 14 mph 55 / 52°F 93% 1004 mb
Low level cloud: 65%
Mid level cloud: 16%
High level cloud: 4%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 7 / 13 mph 52 / 49°F 94% 1004 mb
Low level cloud: 40%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

 6 / 11 mph 51 / 49°F 94% 1004 mb
Low level cloud: 11%
Mid level cloud: 17%
High level cloud: 20%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 6 / 8 mph 63 / 62°F 77% 1004 mb
Low level cloud: 59%
Mid level cloud: 46%
High level cloud: 93%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

 7 / 10 mph 60 / 60°F 90% 1004 mb
Low level cloud: 82%
Mid level cloud: 81%
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

SE
SE

 4 / 5 mph 62 / 60°F 90% 1004 mb
Low level cloud: 48%
Mid level cloud: 52%
High level cloud: 32%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

 4 / 5 mph 62 / 60°F 93% 1005 mb
Low level cloud: 47%
Mid level cloud: 44%
High level cloud: 5%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 3 / 5 mph 59 / 59°F 93% 1007 mb
Low level cloud: 25%
Mid level cloud: 39%
High level cloud: 11%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 03
Sep		00:00

E
E

 0 / 1 mph 57 / 57°F 94% 1007 mb
Low level cloud: 46%
Mid level cloud: 25%
High level cloud: 33%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 2 / 3 mph 56 / 56°F 95% 1007 mb
Low level cloud: 50%
Mid level cloud: 47%
High level cloud: 61%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

 4 / 8 mph 55 / 55°F 95% 1007 mb
Low level cloud: 33%
Mid level cloud: 47%
High level cloud: 69%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 10 / 15 mph 58 / 56°F 93% 1007 mb
Low level cloud: 43%
Mid level cloud: 85%
High level cloud: 100%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 15 / 23 mph 62 / 62°F 96% 1006 mb
Low level cloud: 98%
Mid level cloud: 92%
High level cloud: 74%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
15:00

SW
SW

 13 / 17 mph 69 / 68°F 82% 1006 mb
Low level cloud: 63%
Mid level cloud: 45%
High level cloud: 12%
Most Significant Cloud Type: low
79%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

SSW
SSW

 11 / 19 mph 66 / 65°F 87% 1006 mb
Low level cloud: 44%
Mid level cloud: 46%
High level cloud: 14%
Most Significant Cloud Type: low
62%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

SSW
SSW

 12 / 19 mph 62 / 62°F 95% 1007 mb
Low level cloud: 57%
Mid level cloud: 44%
High level cloud: 33%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 04
Sep		00:00

SSW
SSW

 11 / 17 mph 63 / 63°F 96% 1006 mb
Low level cloud: 76%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 10 / 15 mph 61 / 61°F 96% 1006 mb
Low level cloud: 65%
Mid level cloud: 42%
High level cloud: 14%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 7 / 11 mph 60 / 60°F 94% 1007 mb
Low level cloud: 24%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 10 / 13 mph 63 / 63°F 86% 1009 mb
Low level cloud: 85%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 10 / 11 mph 68 / 67°F 67% 1009 mb
Low level cloud: 70%
Mid level cloud: 15%
High level cloud: 100%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 8 / 9 mph 69 / 67°F 67% 1009 mb
Low level cloud: 47%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 8 / 11 mph 64 / 64°F 74% 1010 mb
Low level cloud: 70%
Mid level cloud: 23%
High level cloud: 4%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 6 / 8 mph 61 / 61°F 85% 1011 mb
Low level cloud: 4%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 05
Sep		00:00

WSW
WSW

 8 / 17 mph 56 / 54°F 93% 1006 mb
Low level cloud: 6%
Mid level cloud: 52%
High level cloud: 100%
Most Significant Cloud Type: medium
72%
0.0 In
06:00

W
W

 7 / 15 mph 58 / 57°F 91% 999 mb
Low level cloud: 63%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
90%
0.0 In
12:00

W
W

 9 / 20 mph 66 / 66°F 58% 1007 mb
Low level cloud: 15%
Mid level cloud: 29%
High level cloud: 30%
Most Significant Cloud Type: low
29%
0.0 In
18:00

WNW
WNW

 14 / 28 mph 66 / 66°F 68% 1007 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 32%
Most Significant Cloud Type: medium
8%
0.0 In
Sat 06
Sep		00:00

SSW
SSW

 9 / 19 mph 54 / 51°F 88% 1013 mb
Low level cloud: 18%
Mid level cloud: 25%
High level cloud: 8%
Most Significant Cloud Type: low
27%
0.0 In
06:00

N
N

 2 / 3 mph 58 / 58°F 89% 1017 mb
Low level cloud: 2%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.0 In
12:00

WSW
WSW

 6 / 12 mph 65 / 65°F 61% 1012 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 99%
Most Significant Cloud Type: medium
47%
0.0 In
18:00

WSW
WSW

 5 / 11 mph 68 / 69°F 67% 1016 mb
Low level cloud: 57%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
85%
0.0 In
Sun 07
Sep		00:00

ESE
ESE

 4 / 9 mph 63 / 63°F 89% 1017 mb
Low level cloud: 10%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
16%
0.0 In
06:00

ESE
ESE

 5 / 11 mph 56 / 55°F 91% 1018 mb
Low level cloud: 24%
Mid level cloud: 6%
High level cloud: 5%
Most Significant Cloud Type: low
26%
0.0 In
12:00

SE
SE

 12 / 25 mph 74 / 77°F 49% 1013 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 17%
Most Significant Cloud Type: medium
27%
0.0 In
18:00

SE
SE

 11 / 24 mph 68 / 68°F 54% 1013 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
0.0 In
Mon 08
Sep		00:00

ESE
ESE

 2 / 5 mph 67 / 67°F 88% 1011 mb
Low level cloud: 0%
Mid level cloud: 47%
High level cloud: 96%
Most Significant Cloud Type: medium
50%
0.1 In
06:00

SSE
SSE

 4 / 8 mph 63 / 63°F 93% 1011 mb
Low level cloud: 44%
Mid level cloud: 5%
High level cloud: 70%
Most Significant Cloud Type: low
53%
0.0 In
12:00

SSW
SSW

 10 / 20 mph 76 / 78°F 55% 1012 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: medium
10%
0.0 In
18:00

SSW
SSW

 11 / 23 mph 68 / 68°F 67% 1012 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 34%
Most Significant Cloud Type: medium
8%
0.0 In
Tue 09
Sep		00:00

S
S

 2 / 4 mph 67 / 67°F 89% 1013 mb
Low level cloud: 2%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
06:00

S
S

 6 / 13 mph 57 / 56°F 92% 1014 mb
Low level cloud: 25%
Mid level cloud: 3%
High level cloud: 39%
Most Significant Cloud Type: low
31%
0.0 In
12:00

ESE
ESE

 7 / 15 mph 73 / 77°F 73% 1010 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
49%
0.1 In
18:00

W
W

 10 / 22 mph 65 / 65°F 68% 1016 mb
Low level cloud: 72%
Mid level cloud: 46%
High level cloud: 49%
Most Significant Cloud Type: low
94%
0.0 In
Wed 10
Sep		00:00

E
E

 6 / 12 mph 67 / 67°F 93% 1005 mb
Low level cloud: 8%
Mid level cloud: 65%
High level cloud: 100%
Most Significant Cloud Type: medium
91%
0.1 In
06:00

S
S

 9 / 18 mph 57 / 55°F 96% 1019 mb
Low level cloud: 52%
Mid level cloud: 5%
High level cloud: 15%
Most Significant Cloud Type: low
56%
0.0 In
12:00

ESE
ESE

 18 / 39 mph 66 / 66°F 93% 993 mb
Low level cloud: 100%
Mid level cloud: 39%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.4 In
18:00

SSW
SSW

 15 / 31 mph 66 / 66°F 82% 1018 mb
Low level cloud: 76%
Mid level cloud: 30%
High level cloud: 57%
Most Significant Cloud Type: low
92%
0.0 In
Thu 11
Sep		00:00

SSE
SSE

 20 / 43 mph 62 / 62°F 95% 997 mb
Low level cloud: 100%
Mid level cloud: 91%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.1 In
06:00

SW
SW

 9 / 19 mph 64 / 64°F 93% 1019 mb
Low level cloud: 86%
Mid level cloud: 20%
High level cloud: 45%
Most Significant Cloud Type: low
98%
0.1 In
12:00

SSW
SSW

 15 / 32 mph 66 / 66°F 88% 1011 mb
Low level cloud: 84%
Mid level cloud: 45%
High level cloud: 13%
Most Significant Cloud Type: low
100%
0.4 In
18:00

W
W

 9 / 19 mph 71 / 71°F 69% 1024 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
Fri 12
Sep		00:00

S
S

 10 / 21 mph 64 / 64°F 90% 1017 mb
Low level cloud: 90%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
94%
0.1 In
06:00

SW
SW

 2 / 5 mph 58 / 60°F 96% 1029 mb
Low level cloud: 48%
Mid level cloud: 29%
High level cloud: 3%
Most Significant Cloud Type: low
58%
0.0 In
12:00

SSE
SSE

 11 / 22 mph 69 / 69°F 71% 1020 mb
Low level cloud: 37%
Mid level cloud: 26%
High level cloud: 98%
Most Significant Cloud Type: low
58%
0.0 In
18:00

NNE
NNE

 2 / 5 mph 75 / 78°F 57% 1029 mb
Low level cloud: 9%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
14%
0.0 In
Sat 13
Sep		00:00

SE
SE

 11 / 22 mph 61 / 62°F 89% 1017 mb
Low level cloud: 0%
Mid level cloud: 92%
High level cloud: 100%
Most Significant Cloud Type: medium
96%
0.0 In
06:00

ESE
ESE

 5 / 10 mph 62 / 62°F 74% 1028 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 29%
Most Significant Cloud Type: medium
5%
0.0 In
12:00

WSW
WSW

 9 / 19 mph 68 / 68°F 74% 1017 mb
Low level cloud: 72%
Mid level cloud: 5%
High level cloud: 12%
Most Significant Cloud Type: low
74%
0.3 In
18:00

SE
SE

 9 / 18 mph 74 / 77°F 50% 1023 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
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