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Hellaby 14 Day Long Range Forecast

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

Rotherham, United Kingdom

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

The outlook for Hellaby in the two weeks ahead shows the average daytime maximum temperature will be around 4°C, with a high for the two weeks of 8°C expected on the afternoon of Sunday 11th. The average minimum temperature will be 0°C, dipping to its lowest on the morning of Wednesday 7th at -2°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. Current predictions suggest Friday 9th will have the most precipitation with an accumulation of around 12.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 02
Jan		18:00

WNW
WNW

 8 / 9 mph 38 / 33°F 67% 1007 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
21:00

WNW
WNW

 9 / 12 mph 36 / 29°F 67% 1007 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 03
Jan		00:00

NW
NW

 12 / 20 mph 33 / 24°F 63% 1007 mb
Low level cloud: 3%
Mid level cloud: 92%
High level cloud: 0%
Most Significant Cloud Type: medium
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

 14 / 21 mph 32 / 22°F 54% 1008 mb
Low level cloud: 0%
Mid level cloud: 3%
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

NW
NW

 15 / 24 mph 31 / 20°F 53% 1007 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

 14 / 19 mph 33 / 23°F 51% 1009 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

 15 / 20 mph 35 / 26°F 50% 1010 mb
Low level cloud: 33%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

 15 / 18 mph 37 / 28°F 46% 1010 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

 15 / 17 mph 35 / 26°F 49% 1011 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

 13 / 15 mph 34 / 24°F 51% 1013 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 04
Jan		00:00

NW
NW

 13 / 17 mph 32 / 23°F 51% 1014 mb
Low level cloud: 0%
Mid level cloud: 7%
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

NW
NW

 13 / 19 mph 31 / 21°F 50% 1014 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

NW
NW

 12 / 19 mph 30 / 20°F 51% 1014 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

 12 / 15 mph 32 / 23°F 49% 1015 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
12:00

NW
NW

 12 / 15 mph 35 / 27°F 42% 1015 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
15:00

WNW
WNW

 10 / 12 mph 36 / 29°F 45% 1014 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 6 / 7 mph 35 / 30°F 63% 1013 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 8 / 11 mph 34 / 27°F 72% 1013 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 1%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 05
Jan		00:00

NW
NW

 6 / 9 mph 31 / 26°F 72% 1012 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 3%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

 7 / 11 mph 31 / 24°F 55% 1013 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
06:00

WNW
WNW

 10 / 18 mph 29 / 20°F 49% 1012 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

 9 / 13 mph 31 / 23°F 51% 1014 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
12:00

NW
NW

 9 / 13 mph 34 / 26°F 47% 1014 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
15:00

WNW
WNW

 7 / 9 mph 35 / 29°F 49% 1014 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
18:00

WNW
WNW

 6 / 7 mph 35 / 29°F 56% 1015 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
21:00

WNW
WNW

 6 / 8 mph 33 / 28°F 56% 1016 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 3%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 06
Jan		00:00

WNW
WNW

 5 / 9 mph 30 / 25°F 58% 1015 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 4%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

 4 / 9 mph 29 / 24°F 60% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 18%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

 4 / 8 mph 28 / 23°F 61% 1015 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 15%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

 4 / 7 mph 30 / 25°F 61% 1016 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 8%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

 5 / 7 mph 33 / 28°F 50% 1016 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 2%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

 4 / 6 mph 34 / 30°F 54% 1015 mb
Low level cloud: 0%
Mid level cloud: 39%
High level cloud: 0%
Most Significant Cloud Type: medium
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 4 / 6 mph 33 / 29°F 59% 1016 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: medium
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

 5 / 9 mph 31 / 25°F 58% 1017 mb
Low level cloud: 0%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: medium
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 07
Jan		00:00

WNW
WNW

 6 / 11 mph 30 / 24°F 59% 1017 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

 7 / 14 mph 29 / 22°F 61% 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
06:00

NW
NW

 7 / 14 mph 28 / 20°F 64% 1018 mb
Low level cloud: 7%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

 5 / 10 mph 30 / 24°F 64% 1018 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WNW
WNW

 6 / 10 mph 33 / 28°F 53% 1019 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 5 / 8 mph 35 / 30°F 56% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 22%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 6 / 7 mph 34 / 29°F 64% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 14%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 5 / 7 mph 32 / 28°F 64% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 44%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 08
Jan		00:00

WSW
WSW

 4 / 6 mph 31 / 28°F 60% 1017 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 33%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 4 / 7 mph 30 / 27°F 61% 1016 mb
Low level cloud: 0%
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
06:00

S
S

 5 / 11 mph 29 / 24°F 67% 1014 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 9%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 9 / 15 mph 32 / 23°F 81% 1013 mb
Low level cloud: 75%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 12 / 17 mph 34 / 25°F 91% 1011 mb
Low level cloud: 96%
Mid level cloud: 68%
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

SW
SW

 8 / 13 mph 35 / 29°F 96% 1009 mb
Low level cloud: 85%
Mid level cloud: 15%
High level cloud: 7%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 9 / 17 mph 34 / 28°F 94% 1008 mb
Low level cloud: 30%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 5 / 11 mph 33 / 28°F 95% 1007 mb
Low level cloud: 21%
Mid level cloud: 12%
High level cloud: 49%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 09
Jan		00:00

W
W

 6 / 10 mph 43 / 40°F 90% 1010 mb
Low level cloud: 49%
Mid level cloud: 100%
High level cloud: 92%
Most Significant Cloud Type: low
95%
0.0 In
06:00

W
W

 18 / 34 mph 39 / 30°F 71% 1001 mb
Low level cloud: 85%
Mid level cloud: 15%
High level cloud: 10%
Most Significant Cloud Type: low
91%
0.0 In
12:00

W
W

 15 / 23 mph 40 / 32°F 66% 1007 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
18:00

WNW
WNW

 17 / 21 mph 40 / 31°F 90% 1001 mb
Low level cloud: 90%
Mid level cloud: 90%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
Sat 10
Jan		00:00

W
W

 9 / 16 mph 36 / 29°F 88% 1011 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 3%
Most Significant Cloud Type: medium
11%
0.0 In
06:00

WNW
WNW

 9 / 17 mph 32 / 25°F 79% 1003 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
12:00

SSE
SSE

 2 / 2 mph 38 / 37°F 86% 1003 mb
Low level cloud: 26%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
40%
0.0 In
18:00

NW
NW

 7 / 9 mph 41 / 36°F 75% 1003 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
Sun 11
Jan		00:00

SW
SW

 17 / 27 mph 39 / 30°F 89% 1003 mb
Low level cloud: 99%
Mid level cloud: 74%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
06:00

WNW
WNW

 10 / 19 mph 33 / 25°F 66% 1011 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
12:00

SSE
SSE

 15 / 23 mph 45 / 38°F 94% 980 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
18:00

W
W

 8 / 10 mph 40 / 35°F 77% 1018 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
Mon 12
Jan		00:00

SW
SW

 12 / 18 mph 43 / 37°F 77% 975 mb
Low level cloud: 71%
Mid level cloud: 44%
High level cloud: 92%
Most Significant Cloud Type: low
96%
0.1 In
06:00

SW
SW

 6 / 10 mph 37 / 32°F 85% 1018 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 17%
Most Significant Cloud Type: medium
10%
0.0 In
12:00

NW
NW

 13 / 18 mph 42 / 35°F 71% 987 mb
Low level cloud: 35%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
54%
0.0 In
18:00

SSE
SSE

 17 / 29 mph 38 / 29°F 95% 1004 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 69%
Most Significant Cloud Type: low
100%
0.1 In
Tue 13
Jan		00:00

W
W

 5 / 6 mph 39 / 35°F 62% 1001 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 4%
Most Significant Cloud Type: medium
5%
0.0 In
06:00

S
S

 9 / 20 mph 43 / 37°F 94% 989 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
12:00

SSW
SSW

 5 / 6 mph 39 / 36°F 63% 1003 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 18%
Most Significant Cloud Type: medium
27%
0.0 In
18:00

WSW
WSW

 13 / 16 mph 48 / 43°F 77% 995 mb
Low level cloud: 15%
Mid level cloud: 6%
High level cloud: 33%
Most Significant Cloud Type: low
21%
0.1 In
Wed 14
Jan		00:00

SE
SE

 6 / 7 mph 38 / 34°F 79% 1003 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: medium
9%
0.0 In
06:00

SW
SW

 17 / 30 mph 47 / 40°F 79% 998 mb
Low level cloud: 17%
Mid level cloud: 19%
High level cloud: 50%
Most Significant Cloud Type: low
29%
0.0 In
12:00

E
E

 13 / 21 mph 37 / 29°F 96% 991 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
18:00

SSW
SSW

 16 / 22 mph 51 / 46°F 83% 998 mb
Low level cloud: 23%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
50%
0.0 In
Thu 15
Jan		00:00

S
S

 6 / 12 mph 38 / 34°F 95% 987 mb
Low level cloud: 34%
Mid level cloud: 22%
High level cloud: 13%
Most Significant Cloud Type: low
43%
0.2 In
06:00

SSW
SSW

 17 / 29 mph 49 / 42°F 81% 995 mb
Low level cloud: 86%
Mid level cloud: 74%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSW
SSW

 11 / 16 mph 45 / 39°F 82% 981 mb
Low level cloud: 34%
Mid level cloud: 8%
High level cloud: 32%
Most Significant Cloud Type: low
41%
0.0 In
18:00

SSW
SSW

 15 / 20 mph 52 / 47°F 76% 993 mb
Low level cloud: 44%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
46%
0.0 In
Fri 16
Jan		00:00

S
S

 7 / 11 mph 40 / 35°F 94% 981 mb
Low level cloud: 43%
Mid level cloud: 15%
High level cloud: 13%
Most Significant Cloud Type: low
50%
0.0 In
06:00

SW
SW

 15 / 23 mph 44 / 37°F 80% 994 mb
Low level cloud: 35%
Mid level cloud: 11%
High level cloud: 8%
Most Significant Cloud Type: low
40%
0.0 In
12:00

WNW
WNW

 5 / 7 mph 42 / 39°F 89% 987 mb
Low level cloud: 77%
Mid level cloud: 83%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WSW
WSW

 15 / 21 mph 48 / 42°F 73% 1000 mb
Low level cloud: 46%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
53%
0.0 In
Sat 17
Jan		00:00

SW
SW

 10 / 18 mph 42 / 36°F 89% 1001 mb
Low level cloud: 69%
Mid level cloud: 14%
High level cloud: 32%
Most Significant Cloud Type: low
77%
0.0 In
06:00

WNW
WNW

 15 / 25 mph 42 / 34°F 78% 1011 mb
Low level cloud: 31%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.0 In
12:00

SSE
SSE

 15 / 22 mph 46 / 39°F 91% 997 mb
Low level cloud: 93%
Mid level cloud: 62%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
18:00

W
W

 10 / 13 mph 45 / 39°F 81% 1020 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
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