Historical

Data fields for the historical weather API:

FieldValues (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 nullF: 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 nullF: 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.

This field will be deprecated on December 31st, 2022. Use precipitationAccumulation instead. For daily sum, use precipitationAccumulationSum
mm
in
F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e totalPrecipitationAccumulationMax
precipitationAccumulation

The amount of precipitation accumulated every hour within a given timeframe.
mm
in
F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Sum, Max, Min, Avg, P95, P50, P5. i.e precipitationAccumulationSum
et0

Will be deprecated on December 31st, 2022. Use potentialEvaporation instead. For daily sum, use potentialEvaporationSum

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.

Will be deprecated on December 31st, 2022. Use snowAccumulationLiquidWaterEquivalent instead. For daily sum, use snowAccumulationLiquidWaterEquivalentSum
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: Sum, Max, Min, Avg, P95, P50, P5. i.e potentialEvaporationMax
evaporationFromVegetationTranspiration

The amount of evaporation from vegetation transpiration

Will be deprecated on December 31st, 2022. Use evaporationVegetationTranspiration instead. For daily sum, use evaporationVegetationTranspirationSum
mm
in
F: January 1st 2000 till -90 days.
I: H
A: WW Land
Aggregations: Max, Min, Avg, P95, P50, P5. i.e evaporationFromVegetationTranspirationMax
evaporationVegetationTranspiration

The amount of evaporation from vegetation transpiration
mm
in
F: January 1st 2000 till -90 days.
I: H
A: WW Land
Aggregations: Sum, Max, Min, Avg, P95, P50, P5. i.e evaporationVegetationTranspiration
totalSnowAccumulationLwe

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

Will be deprecated on December 31st, 2022. Use snowAccumulationLiquidWaterEquivalent instead. For daily sum, use snowAccumulationLiquidWaterEquivalentSum
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
snowAccumulationLiquidWaterEquivalent

The amount of 'liquid water equivalent' of the new snowfall accumulated every hour within a given timeframe
mm of LWE
in of LWE
F: January 1st 2000 till -7 days.
I: H
A: WW Land
Aggregations: Sum, Max, Min, Avg, P95, P50, P5. i.e snowAccumulationLiquidWaterEquivalentSum
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:

FieldValues (Metric, Imperial)Availability
sunriseTime

The daily appearance of the Sun on the horizon due to Earth's rotation
UTC ISO-8601F: 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-8601F: 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