WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Oxford 14 Day Long Range Forecast

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

North Carolina, United States Of America

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

The forecast for Oxford in the coming two weeks is predicting the average daytime maximum temperature will be around 22°C, with a high for the two weeks of 27°C expected on the afternoon of Friday 17th. The average minimum temperature will be 14°C, dipping to its lowest on the morning of Tuesday 21st at 10°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. It looks like Tuesday 14th will have the most precipitation with an accumulation of around 28.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 14
May
16:00

SE
SE

12 / 18 mph 64 / 64°F 98% 1009 mb
Low level cloud: 100%
Mid level cloud: 51%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
19:00

SE
SE

11 / 17 mph 64 / 64°F 99% 1008 mb
Low level cloud: 98%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

ESE
ESE

8 / 11 mph 63 / 63°F 99% 1009 mb
Low level cloud: 100%
Mid level cloud: 51%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 15
May
01:00

SE
SE

5 / 7 mph 62 / 62°F 99% 1007 mb
Low level cloud: 100%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

3 / 5 mph 62 / 62°F 99% 1006 mb
Low level cloud: 97%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

3 / 4 mph 65 / 64°F 96% 1007 mb
Low level cloud: 93%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

4 / 6 mph 70 / 68°F 88% 1006 mb
Low level cloud: 79%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

3 / 4 mph 80 / 79°F 70% 1004 mb
Low level cloud: 37%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
40%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

NNW
NNW

3 / 6 mph 77 / 78°F 81% 1003 mb
Low level cloud: 16%
Mid level cloud: 17%
High level cloud: 15%
Most Significant Cloud Type: low
23%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
19:00

NNE
NNE

9 / 15 mph 67 / 66°F 95% 1004 mb
Low level cloud: 60%
Mid level cloud: 24%
High level cloud: 82%
Most Significant Cloud Type: low
77%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

NNE
NNE

8 / 13 mph 62 / 62°F 97% 1006 mb
Low level cloud: 83%
Mid level cloud: 19%
High level cloud: 16%
Most Significant Cloud Type: low
91%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Thu 16
May
01:00

NNE
NNE

6 / 9 mph 59 / 59°F 98% 1006 mb
Low level cloud: 88%
Mid level cloud: 32%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

6 / 9 mph 59 / 58°F 97% 1007 mb
Low level cloud: 92%
Mid level cloud: 44%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

N
N

8 / 11 mph 60 / 60°F 94% 1009 mb
Low level cloud: 86%
Mid level cloud: 43%
High level cloud: 54%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

N
N

9 / 10 mph 68 / 68°F 70% 1009 mb
Low level cloud: 98%
Mid level cloud: 20%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNW
NNW

9 / 11 mph 73 / 76°F 63% 1009 mb
Low level cloud: 77%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

7 / 9 mph 75 / 77°F 59% 1009 mb
Low level cloud: 79%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNE
NNE

1 / 2 mph 72 / 68°F 76% 1010 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

3 / 7 mph 62 / 62°F 89% 1012 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
Fri 17
May
01:00

N
N

4 / 8 mph 60 / 60°F 92% 1013 mb
Low level cloud: 1%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

5 / 10 mph 56 / 56°F 98% 1013 mb
Low level cloud: 20%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNE
NNE

6 / 9 mph 63 / 60°F 86% 1015 mb
Low level cloud: 30%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

4 / 5 mph 76 / 76°F 62% 1015 mb
Low level cloud: 6%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

2 / 3 mph 80 / 81°F 52% 1014 mb
Low level cloud: 95%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

3 / 4 mph 81 / 80°F 60% 1013 mb
Low level cloud: 58%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

4 / 7 mph 74 / 76°F 84% 1013 mb
Low level cloud: 34%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

4 / 9 mph 67 / 67°F 92% 1013 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 42%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May
01:00

SE
SE

5 / 10 mph 65 / 65°F 95% 1013 mb
Low level cloud: 3%
Mid level cloud: 46%
High level cloud: 5%
Most Significant Cloud Type: medium
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SE
SE

5 / 9 mph 63 / 63°F 98% 1013 mb
Low level cloud: 43%
Mid level cloud: 29%
High level cloud: 17%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

6 / 9 mph 66 / 66°F 97% 1014 mb
Low level cloud: 90%
Mid level cloud: 45%
High level cloud: 30%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

8 / 11 mph 71 / 71°F 90% 1013 mb
Low level cloud: 88%
Mid level cloud: 45%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

5 / 8 mph 71 / 69°F 97% 1011 mb
Low level cloud: 51%
Mid level cloud: 44%
High level cloud: 86%
Most Significant Cloud Type: low
76%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
16:00

S
S

11 / 16 mph 75 / 77°F 90% 1008 mb
Low level cloud: 18%
Mid level cloud: 46%
High level cloud: 19%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

10 / 20 mph 72 / 76°F 91% 1007 mb
Low level cloud: 6%
Mid level cloud: 52%
High level cloud: 80%
Most Significant Cloud Type: medium
72%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

SSW
SSW

6 / 10 mph 68 / 68°F 97% 1007 mb
Low level cloud: 30%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
49%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Sun 19
May
01:00

SW
SW

7 / 12 mph 66 / 66°F 98% 1005 mb
Low level cloud: 54%
Mid level cloud: 21%
High level cloud: 32%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

8 / 12 mph 63 / 63°F 99% 1004 mb
Low level cloud: 91%
Mid level cloud: 18%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

7 / 10 mph 65 / 65°F 96% 1005 mb
Low level cloud: 78%
Mid level cloud: 14%
High level cloud: 70%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

6 / 7 mph 72 / 76°F 83% 1004 mb
Low level cloud: 73%
Mid level cloud: 32%
High level cloud: 20%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

6 / 10 mph 79 / 78°F 78% 1002 mb
Low level cloud: 53%
Mid level cloud: 46%
High level cloud: 12%
Most Significant Cloud Type: low
70%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

NW
NW

7 / 14 mph 67 / 66°F 98% 1002 mb
Low level cloud: 59%
Mid level cloud: 62%
High level cloud: 32%
Most Significant Cloud Type: low
83%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
19:00

NNE
NNE

11 / 16 mph 63 / 63°F 98% 1003 mb
Low level cloud: 100%
Mid level cloud: 80%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

N
N

10 / 15 mph 59 / 57°F 97% 1005 mb
Low level cloud: 100%
Mid level cloud: 40%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
01:00

NNE
NNE

9 / 13 mph 57 / 54°F 96% 1005 mb
Low level cloud: 100%
Mid level cloud: 81%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

8 / 12 mph 55 / 53°F 98% 1006 mb
Low level cloud: 97%
Mid level cloud: 100%
High level cloud: 96%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
07:00

N
N

9 / 13 mph 55 / 52°F 98% 1008 mb
Low level cloud: 100%
Mid level cloud: 69%
High level cloud: 20%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

N
N

9 / 12 mph 57 / 55°F 93% 1010 mb
Low level cloud: 97%
Mid level cloud: 74%
High level cloud: 5%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNE
NNE

10 / 12 mph 64 / 64°F 73% 1010 mb
Low level cloud: 96%
Mid level cloud: 32%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

8 / 11 mph 66 / 65°F 72% 1010 mb
Low level cloud: 90%
Mid level cloud: 23%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

4 / 7 mph 64 / 61°F 86% 1011 mb
Low level cloud: 19%
Mid level cloud: 6%
High level cloud: 4%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

4 / 7 mph 56 / 56°F 94% 1013 mb
Low level cloud: 47%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Tue 21
May
01:00

ESE
ESE

3 / 6 mph 53 / 53°F 86% 1023 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
07:00

WNW
WNW

8 / 17 mph 74 / 78°F 80% 1007 mb
Low level cloud: 41%
Mid level cloud: 19%
High level cloud: 32%
Most Significant Cloud Type: low
51%
0.0 In
19:00

NW
NW

2 / 5 mph 79 / 83°F 78% 1009 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 41%
Most Significant Cloud Type: medium
26%
0.0 In
Wed 22
May
01:00

SSW
SSW

11 / 23 mph 74 / 77°F 74% 1010 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
0.0 In
07:00

S
S

6 / 13 mph 67 / 67°F 89% 1015 mb
Low level cloud: 44%
Mid level cloud: 17%
High level cloud: 16%
Most Significant Cloud Type: low
51%
0.0 In
13:00

SW
SW

9 / 20 mph 84 / 85°F 47% 1013 mb
Low level cloud: 8%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
0.0 In
19:00

ESE
ESE

7 / 15 mph 71 / 71°F 70% 1021 mb
Low level cloud: 2%
Mid level cloud: 50%
High level cloud: 33%
Most Significant Cloud Type: medium
57%
0.0 In
Thu 23
May
01:00

SSW
SSW

10 / 20 mph 67 / 67°F 91% 1010 mb
Low level cloud: 14%
Mid level cloud: 16%
High level cloud: 80%
Most Significant Cloud Type: low
28%
0.0 In
07:00

SE
SE

3 / 6 mph 58 / 59°F 76% 1025 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 8%
Most Significant Cloud Type: medium
30%
0.0 In
13:00

SW
SW

15 / 31 mph 88 / 92°F 51% 1006 mb
Low level cloud: 12%
Mid level cloud: 15%
High level cloud: 16%
Most Significant Cloud Type: low
18%
0.2 In
19:00

NW
NW

3 / 7 mph 63 / 63°F 75% 1022 mb
Low level cloud: 0%
Mid level cloud: 94%
High level cloud: 19%
Most Significant Cloud Type: medium
95%
0.0 In
Fri 24
May
01:00

WSW
WSW

6 / 13 mph 69 / 69°F 96% 1006 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 9%
Most Significant Cloud Type: medium
7%
0.2 In
07:00

S
S

7 / 14 mph 59 / 58°F 88% 1021 mb
Low level cloud: 90%
Mid level cloud: 79%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
13:00

W
W

12 / 25 mph 82 / 85°F 61% 1007 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 11%
Most Significant Cloud Type: medium
45%
0.0 In
19:00

SSE
SSE

8 / 17 mph 63 / 63°F 98% 1017 mb
Low level cloud: 93%
Mid level cloud: 79%
High level cloud: 98%
Most Significant Cloud Type: low
100%
0.1 In
Sat 25
May
01:00

SSW
SSW

3 / 6 mph 71 / 71°F 96% 1008 mb
Low level cloud: 16%
Mid level cloud: 10%
High level cloud: 22%
Most Significant Cloud Type: low
22%
0.0 In
07:00

SSW
SSW

8 / 17 mph 63 / 63°F 97% 1014 mb
Low level cloud: 96%
Mid level cloud: 19%
High level cloud: 15%
Most Significant Cloud Type: low
100%
0.1 In
13:00

W
W

4 / 8 mph 77 / 81°F 77% 1007 mb
Low level cloud: 89%
Mid level cloud: 44%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.1 In
19:00

SE
SE

4 / 7 mph 76 / 81°F 91% 1012 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 100%
Most Significant Cloud Type: medium
16%
0.1 In
Sun 26
May
01:00

N
N

10 / 21 mph 61 / 61°F 97% 1011 mb
Low level cloud: 95%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
07:00

NE
NE

6 / 13 mph 61 / 61°F 97% 1015 mb
Low level cloud: 95%
Mid level cloud: 30%
High level cloud: 12%
Most Significant Cloud Type: low
100%
0.1 In
13:00

N
N

7 / 15 mph 76 / 78°F 47% 1015 mb
Low level cloud: 15%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
88%
0.0 In
19:00

NE
NE

4 / 8 mph 76 / 80°F 85% 1012 mb
Low level cloud: 4%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
6%
0.0 In
Mon 27
May
01:00

NW
NW

6 / 13 mph 60 / 60°F 66% 1017 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 4%
Most Significant Cloud Type: medium
6%
0.0 In
07:00

NW
NW

1 / 2 mph 70 / 70°F 94% 1014 mb
Low level cloud: 58%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
66%
0.1 In
13:00

N
N

4 / 9 mph 80 / 80°F 43% 1018 mb
Low level cloud: 0%
Mid level cloud: 41%
High level cloud: 10%
Most Significant Cloud Type: medium
41%
0.0 In
19:00

NE
NE

6 / 12 mph 75 / 79°F 88% 1013 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.3 In
Tue 28
May
01:00

SE
SE

6 / 12 mph 64 / 64°F 89% 1019 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 30%
Most Significant Cloud Type: medium
20%
0.0 In
07:00

ENE
ENE

6 / 12 mph 67 / 67°F 96% 1016 mb
Low level cloud: 74%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
75%
0.0 In
13:00

SSW
SSW

9 / 18 mph 76 / 80°F 73% 1019 mb
Low level cloud: 57%
Mid level cloud: 36%
High level cloud: 0%
Most Significant Cloud Type: low
69%
0.1 In
19:00

S
S

6 / 14 mph 75 / 78°F 78% 1013 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 20%
Most Significant Cloud Type: medium
25%
0.0 In
Wed 29
May
01:00

S
S

9 / 19 mph 67 / 67°F 92% 1019 mb
Low level cloud: 37%
Mid level cloud: 29%
High level cloud: 32%
Most Significant Cloud Type: low
50%
0.2 In
07:00

S
S

8 / 17 mph 70 / 70°F 97% 1008 mb
Low level cloud: 81%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
85%
0.3 In
13:00

SW
SW

14 / 29 mph 85 / 88°F 54% 1013 mb
Low level cloud: 67%
Mid level cloud: 43%
High level cloud: 10%
Most Significant Cloud Type: low
83%
0.0 In
19:00

SW
SW

3 / 7 mph 75 / 80°F 93% 1003 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
0.5 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