WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Shingle Springs 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Shingle Springs

California, United States Of America

Long range weather outlook for Shingle Springs includes 14 day forecast summary:

The forecast for Shingle Springs in the coming two weeks is predicting the average daytime maximum temperature will be around 30°C, with a high for the two weeks of 33°C expected on the afternoon of Friday 31st. The mean minimum temperature will be 14°C, dipping to its lowest on the morning of Sunday 26th at 8°C. Expect the next 14 days remain predominantly dry. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityCloud AmountPrecip AmountWeather
Sun 26
May
01:00

ENE
ENE

2 / 5 mph 51 / 51°F 85%
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
04:00

ENE
ENE

2 / 4 mph 49 / 49°F 79%
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
07:00

W
W

2 / 2 mph 59 / 59°F 55%
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
10:00

W
W

6 / 7 mph 71 / 68°F 43%
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
13:00

W
W

7 / 8 mph 78 / 76°F 34%
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
16:00

W
W

5 / 6 mph 80 / 77°F 32%
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
19:00

WSW
WSW

1 / 2 mph 76 / 76°F 54%
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
22:00

E
E

4 / 6 mph 64 / 64°F 66%
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
Mon 27
May
01:00

E
E

4 / 8 mph 59 / 59°F 68%
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
04:00

E
E

3 / 6 mph 57 / 57°F 68%
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
07:00

SW
SW

2 / 2 mph 66 / 64°F 49%
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
10:00

WSW
WSW

6 / 6 mph 77 / 75°F 33%
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

7 / 8 mph 83 / 78°F 25%
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
16:00

WSW
WSW

5 / 6 mph 84 / 78°F 22%
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
19:00

SSW
SSW

3 / 4 mph 76 / 76°F 42%
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
22:00

E
E

4 / 7 mph 66 / 66°F 50%
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
Tue 28
May
01:00

E
E

3 / 7 mph 60 / 60°F 55%
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
04:00

ENE
ENE

2 / 5 mph 58 / 59°F 63%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

2 / 3 mph 65 / 62°F 52%
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
10:00

WSW
WSW

6 / 7 mph 76 / 75°F 36%
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

8 / 9 mph 82 / 78°F 28%
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
16:00

SW
SW

7 / 8 mph 82 / 78°F 27%
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 6%
Most Significant Cloud Type: high
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

4 / 6 mph 74 / 76°F 52%
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 10%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

5 / 8 mph 64 / 64°F 63%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 29
May
01:00

ESE
ESE

4 / 8 mph 58 / 58°F 65%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ESE
ESE

4 / 6 mph 56 / 56°F 66%
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
07:00

S
S

3 / 4 mph 63 / 60°F 51%
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
10:00

WSW
WSW

6 / 7 mph 74 / 75°F 37%
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
13:00

WSW
WSW

6 / 7 mph 81 / 77°F 30%
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
16:00

W
W

5 / 6 mph 83 / 78°F 27%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 69%
Most Significant Cloud Type: high
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

0 / 0 mph 74 / 76°F 47%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: high
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

4 / 7 mph 65 / 65°F 58%
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
Thu 30
May
01:00

ENE
ENE

4 / 8 mph 60 / 60°F 59%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

4 / 7 mph 58 / 58°F 57%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WNW
WNW

3 / 3 mph 67 / 65°F 43%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 12%
Most Significant Cloud Type: high
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

7 / 8 mph 78 / 76°F 31%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

7 / 8 mph 84 / 79°F 21%
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 4%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

6 / 7 mph 87 / 81°F 19%
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
19:00

N
N

3 / 5 mph 82 / 78°F 34%
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
22:00

E
E

5 / 10 mph 68 / 68°F 40%
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
Fri 31
May
01:00

ENE
ENE

4 / 9 mph 65 / 65°F 42%
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

5 / 10 mph 62 / 62°F 35%
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
07:00

NNE
NNE

1 / 2 mph 73 / 69°F 28%
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
10:00

W
W

6 / 7 mph 84 / 78°F 20%
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
13:00

W
W

7 / 8 mph 90 / 84°F 16%
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
16:00

WNW
WNW

5 / 6 mph 92 / 85°F 13%
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
19:00

SE
SE

1 / 2 mph 85 / 80°F 29%
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
22:00

E
E

5 / 10 mph 70 / 70°F 37%
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
Sat 01
Jun
01:00

E
E

5 / 10 mph 66 / 66°F 39%
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
04:00

E
E

4 / 9 mph 63 / 64°F 41%
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
07:00

S
S

2 / 2 mph 73 / 74°F 34%
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
10:00

WSW
WSW

6 / 7 mph 84 / 78°F 22%
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
13:00

WSW
WSW

7 / 8 mph 90 / 84°F 16%
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
16:00

WSW
WSW

8 / 9 mph 90 / 84°F 15%
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
19:00

SSE
SSE

3 / 5 mph 80 / 77°F 34%
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
22:00

E
E

5 / 9 mph 70 / 70°F 38%
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
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityCloud AmountPrecip AmountWeather
Sun 02
Jun
04:00

ESE
ESE

5 / 10 mph 59 / 58°F 52%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 17%
Most Significant Cloud Type: high
17%
0.0 In
10:00

WSW
WSW

7 / 8 mph 75 / 76°F 34%
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
16:00

W
W

5 / 6 mph 84 / 82°F 29%
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
22:00

SE
SE

3 / 6 mph 69 / 69°F 58%
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 55%
Most Significant Cloud Type: medium
25%
0.0 In
Mon 03
Jun
04:00

SSE
SSE

2 / 2 mph 61 / 61°F 69%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
10:00

SSW
SSW

8 / 9 mph 73 / 76°F 50%
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
16:00

SW
SW

9 / 11 mph 81 / 78°F 25%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
22:00

SE
SE

5 / 8 mph 59 / 60°F 88%
Low level cloud: 5%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
5%
0.0 In
Tue 04
Jun
04:00

SE
SE

3 / 5 mph 57 / 58°F 85%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
0.0 In
10:00

SW
SW

7 / 8 mph 72 / 76°F 47%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
16:00

WSW
WSW

7 / 8 mph 81 / 80°F 30%
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 4%
Most Significant Cloud Type: medium
4%
0.0 In
22:00

S
S

2 / 3 mph 64 / 64°F 83%
Low level cloud: 3%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: medium
52%
0.0 In
Wed 05
Jun
04:00

ESE
ESE

3 / 6 mph 58 / 59°F 66%
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 10%
Most Significant Cloud Type: medium
18%
0.0 In
10:00

WSW
WSW

7 / 8 mph 73 / 76°F 54%
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: medium
8%
0.0 In
16:00

WNW
WNW

6 / 7 mph 84 / 81°F 25%
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 5%
Most Significant Cloud Type: medium
1%
0.0 In
22:00

ESE
ESE

4 / 7 mph 62 / 62°F 64%
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 19%
Most Significant Cloud Type: medium
4%
0.0 In
Thu 06
Jun
04:00

E
E

2 / 3 mph 63 / 63°F 75%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
0.0 In
10:00

SW
SW

6 / 7 mph 73 / 76°F 46%
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 29%
Most Significant Cloud Type: medium
3%
0.0 In
16:00

W
W

5 / 6 mph 91 / 89°F 27%
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 10%
Most Significant Cloud Type: high
9%
0.0 In
22:00

ESE
ESE

5 / 9 mph 60 / 60°F 66%
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
Fri 07
Jun
04:00

SE
SE

2 / 2 mph 66 / 66°F 70%
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 5%
Most Significant Cloud Type: medium
3%
0.0 In
10:00

SW
SW

4 / 4 mph 65 / 65°F 69%
Low level cloud: 70%
Mid level cloud: 75%
High level cloud: 0%
Most Significant Cloud Type: low
96%
0.0 In
16:00

SSW
SSW

1 / 1 mph 88 / 88°F 35%
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 7%
Most Significant Cloud Type: medium
8%
0.0 In
22:00

E
E

4 / 8 mph 61 / 61°F 54%
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
Sat 08
Jun
04:00

E
E

1 / 2 mph 61 / 61°F 87%
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
10:00

WNW
WNW

8 / 9 mph 76 / 76°F 30%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
16:00

SW
SW

6 / 7 mph 85 / 84°F 32%
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
22:00

E
E

5 / 10 mph 68 / 68°F 35%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sun 09
Jun
04:00

SE
SE

4 / 6 mph 60 / 60°F 88%
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
10:00

W
W

6 / 7 mph 85 / 81°F 16%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
16:00

SW
SW

9 / 10 mph 86 / 84°F 29%
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 1%
Most Significant Cloud Type: high
1%
0.0 In
22:00

E
E

5 / 10 mph 74 / 75°F 30%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Mon 10
Jun
04:00

E
E

3 / 5 mph 62 / 62°F 64%
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
10:00

W
W

6 / 7 mph 91 / 87°F 13%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
16:00

SW
SW

10 / 11 mph 85 / 82°F 23%
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 9%
Most Significant Cloud Type: high
9%
0.0 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