Historical

Data fields for the historical weather API:

Field

Values (Metric, Imperial)

Availability

temperature

The "real" temperature measurement (at 2m)

Celsius [-90,60]
Fahrenheit

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e temperatureMax

dewPoint

The temperature to which air must be cooled to become saturated with water vapor (at 2m)

Celsius [0,100]
Fahrenheit

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e dewPointMax

humidity

The concentration of water vapor present in the air

%

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e humidityMax

windSpeed

The fundamental atmospheric quantity caused by air moving from high to low pressure, usually due to changes in temperature at 10m

m/s
mph

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e windSpeedMax

windSpeed100

The fundamental atmospheric quantity caused by air moving from high to low pressure, usually due to changes in temperature at 100m

m/s
mph

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e windSpeed100Max

windDirection

The direction from which it originates, measured in degrees clockwise from due north at 10m

degrees or null

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Avg. i.e windDirectionAvg

windDirection100

The direction from which it originates, measured in degrees clockwise from due north at 100m

degrees or null

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Avg. i.e windDirection100Avg

windGust

The maximum brief increase in the speed of the wind, usually less than 20 seconds (at 10m)

m/s
mph

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e windGustMax

pressureSurfaceLevel

The force exerted against a surface by the weight of the air above the surface (at the surface level)

hPa
inHg

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e pressureSurfaceLevelMax

totalPrecipitationAccumulation

The total amount of precipitation that has occurred within a given timeframe.

mm
in

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e totalPrecipitationAccumulationMax

et0

Will be deprecated on September 1st, 2022.

ET0 (evapotranspiration)
The amount of water extracted from the different soil layers.

mm
in

F: January 1st 2000 till -90 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e et0Max

snowAccumulation

The 'liquid water equivalent' of accumulated amount of new snowfall that has occurred over the last hour of the requested time

Will always return hourly data and does not aggregate - eg. if you request snowAccumulationMax over a daily timestep, the max hourly value of that day will be returned, not the accumulation for the whole day.

mm of LWE
in of LWE

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e snowAccumulationMax

potentialEvaporation

An indication of the maximum possible evaporation

mm
in

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e potentialEvaporationMax

evaporationFromVegetationTranspiration

The amount of evaporation from vegetation transpiration

mm
in

F: January 1st 2000 till -90 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e evaporationFromVegetationTranspirationMax

totalSnowAccumulationLwe

The total 'liquid water equivalent' of accumulated amount of new snowfall that has occurred over the last hour of the requested time

mm of LWE
in of LWE

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e totalSnowAccumulationLweMax

cloudCover

Cloud cover represents the percentage of total cloud cover present occurring at all levels throughout the atmosphere for the reanalysis grid box of which a location/or locations reside.

%

F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e cloudCoverMax

Calculated daily fields:

Field

Values (Metric, Imperial)

Availability

sunriseTime

The daily appearance of the Sun on the horizon due to Earth's rotation

UTC ISO-8601

F: January 1st 2000 till -7 days.
I: H
A: WW Land

sunsetTime

The daily disappearance of the Sun below the horizon due to Earth's rotation

UTC ISO-8601

F: January 1st 2000 till -7 days.
I: H
A: WW Land

moonPhase

The shape of the directly sunlit portion of the Moon as viewed from Earth

0: New (0.0625-0.9375)
1: Waxing Crescent (0.0625-0.1875)
2: First Quarter (0.1875-0.3125)
3: Waxing Gibbous (0.3125-0.4375)
4: Full (0.4375-0.5625)
5: Waning Gibbous (0.5625-0.6875)
6: Third Quarter (0.6875-0.8125)
7: Waning Crescent (0.8125-0.9375)

F: January 1st 2000 till -7 days.
I: H
A: WW Land