## Units in API response ### API response parameters with available units of measurement Table below contains paramers, their description and units of measure for `standard`, `imperial` and `metric` systems of measurement. > Please note, that parameter names and their descriptions and data format of API responce may slightly differ from products documentation, but have the same physical meaning. | Parameter | Description | Standard | Metric | Imperial | | --- | --- | --- | --- | --- | | `dt` | Data | unix, UTC | unix, UTC | unix, UTC | | `start` | Date and time of the start | unix, UTC | unix, UTC | unix, UTC | | `end` | Date and time of the end | unix, UTC | unix, UTC | unix, UTC | | `timezone` | Shift in seconds from UTC | unix, UTC | unix, UTC | unix, UTC | | `sunrise` | Sunrise time | unix, UTC | unix, UTC | unix, UTC | | `sunset` | Sunset time | unix, UTC | unix, UTC | unix, UTC | | `lat` | Latitude | - | - | - | | `lon` | Longitude | - | - | - | | `temp` | Temperature | Kelvin | Celsius | Fahrenheit | | `temp` | Accumulated indicator (only for Accumulated parameters) | Kelvin | Kelvin | Kelvin | | `temp_min` | Minimum temperature | Kelvin | Celsius | Fahrenheit | | `temp_max` | Maximum temperature | Kelvin | Celsius | Fahrenheit | | `temp.day` | Temperature at 12:00 local time | Kelvin | Celsius | Fahrenheit | | `temp.night` | Temperature at 00:00 local time | Kelvin | Celsius | Fahrenheit | | `temp.eve` | Temperature at 18:00 local time | Kelvin | Celsius | Fahrenheit | | `temp.morn` | Temperature at 06:00 local time | Kelvin | Celsius | Fahrenheit | | `feels_like` | Temperature in account with the human perception of weather | Kelvin | Celsius | Fahrenheit | | `feels_like.day` | Temperature at 12:00 local time in account with the human perception of weather | Kelvin | Celsius | Fahrenheit | | `feels_like.night` | Temperature at 00:00 local time in account with the human perception of weather | Kelvin | Celsius | Fahrenheit | | `feels_like.eve` | Temperature at 18:00 local time in account with the human perception of weather | Kelvin | Celsius | Fahrenheit | | `feels_like.morn` | Temperature at 06:00 local time in account with the human perception of weather | Kelvin | Celsius | Fahrenheit | | `road.temp` | Road surface temperature | Kelvin | Celsius | Fahrenheit | | `temp_record_min` | Absolute temperature minimum based on all historical measurements | Kelvin | Kelvin | Kelvin | | `temp_record_max` | Absolute temperature maximum based on all historical measurements | Kelvin | Kelvin | Kelvin | | `temp_average_min` | Average of all minimum temperature values | Kelvin | Kelvin | Kelvin | | `temp_average_max` | Average of all maximum temperature values for this day | Kelvin | Kelvin | Kelvin | | `temp_median` | The median value of the temperature | Kelvin | Kelvin | Kelvin | | `temp_mean` | Average of all temperature measurements | Kelvin | Kelvin | Kelvin | | `temp_p25` | The first quartile of the temperature | Kelvin | Kelvin | Kelvin | | `temp_p75` | The third quartile of the temperature | Kelvin | Kelvin | Kelvin | | `temp_st_dev` | The standard deviation of the temperature | Kelvin | Kelvin | Kelvin | | `pressure` | Atmospheric pressure | hPa | hPa | hPa | | `sea_level` | Atmospheric pressure on the sea level | hPa | hPa | hPa | | `grnd_level` | Atmospheric pressure on the ground level | hPa | hPa | hPa | | `pressure_min` | Absolute pressure minimum based on all historical measurements | hPa | hPa | hPa | | `pressure_max` | Absolute pressure maximum based on all historical measurements | hPa | hPa | hPa | | `pressure_median` | The median value of the pressure | hPa | hPa | hPa | | `pressure_mean` | Average of all pressure measurements | hPa | hPa | hPa | | `pressure_p25` | The first quartile of the pressure | hPa | hPa | hPa | | `pressure_p75` | The third quartile of the pressure | hPa | hPa | hPa | | `pressure_st_dev` | The standard deviation of the pressure | hPa | hPa | hPa | | `humidity` | Humidity | % | % | % | | `humidity_min` | Absolute humidity minimum based on all historical measurements | % | % | % | | `humidity_max` | Absolute humidity maximum based on all historical measurements | % | % | % | | `humidity_median` | The median value of the humidity | % | % | % | | `humidity_mean` | Average of all humidity measurements | % | % | % | | `humidity_p25` | The first quartile of the humidity | % | % | % | | `pressure_p75` | The third quartile of the humidity | % | % | % | | `humidity_st_dev` | The standard deviation of the humidity | % | % | % | | `visibility` | Visibility | m | m | m | | `speed` | Wind speed | meter/sec | meter/sec | miles/hour | | `deg` | Wind direction | meteorological degrees | meteorological degrees | meteorological degrees | | `gust` | Wind gust | meter/sec | meter/sec | miles/hour | | `wind_min` | Absolute wind speed minimum based on all historical measurements | meter/sec | meter/sec | meter/sec | | `wind_max` | Absolute wind speed maximum based on all historical measurements | meter/sec | meter/sec | meter/sec | | `wind_median` | The median value of the wind speed | meter/sec | meter/sec | meter/sec | | `wind_mean` | Average of all wind speed measurements | meter/sec | meter/sec | meter/sec | | `wind_p25` | The first quartile of the wind speed | meter/sec | meter/sec | meter/sec | | `wind_p75` | The third quartile of the wind speed | meter/sec | meter/sec | meter/sec | | `wind_st_dev` | The standard deviation of the wind speed | meter/sec | meter/sec | meter/sec | | `clouds` | Cloudiness | % | % | % | | `rain` | Precipitation volume | mm | mm | mm | | `rain` | Precipitation accumulation indicator (only for Accumulated parameters) | mm | mm | mm | | `rain.1h` | Rain volume for last hour | mm | mm | mm | | `rain.1h` | Precipitation (only for One Call 3.0) | mm/h | mm/h | mm/h | | `rain.3h` | Rain volume for last 3 hours | mm | mm | mm | | `snow` | Precipitation volume | mm | mm | mm | | `snow.1h` | Snow volume for last hour | mm | mm | mm | | `snow.1h` | Precipitation (only for One Call 3.0) | mm/h | mm/h | mm/h | | `snow.3h` | Snow volume for last 3 hours | mm | mm | mm | | `pop` | Probability of precipitation | % | % | % | | `precipitation` | Precipitation (only for One Call 3.0 minutely section) | mm/hour | mm/hour | mm/hour | | `precipitation` | Precipitation volume | mm | mm | mm | | `precipitation_intensity` | Intensity of precipitation | mm/hour | mm/hour | mm/hour | | `precipitation.snow` | Snow water equivalent | mm | mm | mm | | `precipitation.rate` | Intensity of precipitation | mm/s | mm/s | mm/s | | `precipitation.fr_rain` | Freezing rain | mm | mm | mm | | `precipitation.ice` | Ice pellets | mm | mm | mm | | `convective` | Convective precipitation | mm | mm | mm | | `accumulated` | Accumulated volume of precipitation | mm | mm | mm | | `precipitation_min` | Absolute precipitation volume minimum based on all historical measurements | mm | mm | mm | | `precipitation_max` | Absolute precipitation volume maximum based on all historical measurements | mm | mm | mm | | `precipitation_median` | The median value of the precipitation volume | mm | mm | mm | | `precipitation_mean` | Average of all precipitation volume measurements | mm | mm | mm | | `precipitation_p25` | The first quartile of the precipitation volume | mm | mm | mm | | `precipitation_p75` | The third quartile of the precipitation volume | mm | mm | mm | | `precipitation_st_dev` | The standard deviation of the precipitation volume | mm | mm | mm | | `dew_point` | Temperature of dew point | Kelvin | Celsius | Fahrenheit | | `snow_deep` | Depth of snow | cm | cm | cm | | `uvi` | UVI index | W/m2 | W/m2 | W/m2 | | `radiation.ghi_cs` | Global Horizontal Irradiance | W/m2 | W/m2 | W/m2 | | `radiation.dni_cs` | Direct Normal Irradiance | W/m2 | W/m2 | W/m2 | | `radiation.dhi_cs` | Diffuse Horizontal Irradiance | W/m2 | W/m2 | W/m2 | | `components.co` | Сoncentration of CO | μg/m3 | μg/m3 | μg/m3 | | `components.no` | Сoncentration of NO | μg/m3 | μg/m3 | μg/m3 | | `components.no2` | Сoncentration of NO2 | μg/m3 | μg/m3 | μg/m3 | | `components.o3` | Сoncentration of O3 | μg/m3 | μg/m3 | μg/m3 | | `components.so2` | Сoncentration of SO2 | μg/m3 | μg/m3 | μg/m3 | | `components.pm2_5` | Сoncentration of PM2.5 | μg/m3 | μg/m3 | μg/m3 | | `components.pm10` | Сoncentration of PM10 | μg/m3 | μg/m3 | μg/m3 | | `components.nh3` | Сoncentration of NH3 | μg/m3 | μg/m3 | μg/m3 | ## Product list In this section you could find list of products where choice of units of measurement is [available](#with_units) and [not applicable.](#no_units) Products for which `standard`, `imperial` and `metric` units are available are collected below: - [One Call API 4.0](/api/one-call-4.md) - [Current weather data](current) - [Hourly forecast](api/hourly-forecast) - [Daily Forecast 16 Days](forecast16) - [Climatic forecast for 30 days](api/forecast30) - [5 day weather forecast](forecast5) - [Weather History API](/history.md) Please note, that for parameters related to precipitation, rain and snow only mm and mm/h as units of measure are available for `standard`, `imperial` and `metric` systems of measurement. Please find below the list of products for which there are no units selection: - [Road Risk API](api/road-risk) - [Solar Irradiance & Energy Prediction](api/solar-energy-prediction) - [Bulk Download](bulk) - [History API for Timestamp](api/history-api-timestamp) - [History API Full archive](api/history-api-full-archive) - [History Bulk](history-bulk) - [History Forecast Bulk](api/history-forecast-bulk) - [Statistical Weather Data API](api/statistics-api) - [Accumulated Parameters](api/accumulated-parameters) - [Historical Weather Data by State](api/history-data-state) - [Air Pollution API](api/air-pollution)