Precipitation

One subscription REST Weather API for historical, real-time, forecast, and climate data. Historical requests use the same product, endpoint grammar, authentication, scalar parameter catalogue, response version, and delivery formats as other Weather API requests; do not split a Historical endpoint into another Source. Requests support single points, point lists, lines, and grids worldwide. Public documentation proves historical dated requests but does not pin one universal archive start because availability depends on subscribed parameters and data sources.

Governmental GRIB2 grid product family integrating multiple radars, observations, lightning, satellite data, and forecast models. It publishes radar-estimated hail, rotation, reflectivity, precipitation-rate, and accumulation products. MRMS is not a ground-report feed: its hail and precipitation values are algorithmic radar/multi-sensor estimates. Public AWS object storage provides historical and real-time files, and NCEP provides real-time HTTP/LDM delivery.

Integrated daily land-station climate dataset from more than 100,000 stations in 180 countries and territories. It supplies station-day temperature, precipitation, snowfall, snow depth, wind, weather-type, and per-datum attribute fields. NOAA provides station files, an all-stations archive, CDO, and the NCEI Access Data Service. Some non-U.S. WMO-contributed data may have commercial-use or re-export restrictions.

Global hourly and synoptic surface-observation product integrating more than 100 source formats into one ISD schema. It publishes station and observation identifiers, UTC timestamps, coordinates, temperature, wind, gust, precipitation, present-weather, and embedded quality codes through NCEI Access Data Service and bulk Global Hourly files.

Existing daily station-summary Source derived from ISD observations. Preserve its API and bulk-file access, add exact GSOD scalar fields beyond the existing minimum-temperature and precipitation fields, and clarify that wind is emitted in knots rather than converted mph. Some non-U.S. WMO-contributed data may have commercial-use or re-export restrictions.

A separately named Version 2 station summary product publishing hourly, daily, and monthly observations in station-year CSV files and monthly summary forms. It is derived from NCEI station datasets but has its own documented 125-column CSV schema, metric bulk files, U.S.-focused station coverage with limited U.S. Air Force locations abroad, and standing per-station/year plus all-station archive access.

Historical reanalysis API at archive-api.open-meteo.com/v1/archive for arbitrary WGS84 points, multiple coordinates, and ISO dates. It publishes gap-filled, model-assisted—not station-only—hourly weather. Available models include global ERA5 from 1940, ERA5-Land from 1950, and ECMWF IFS from 2017. Paid Professional-or-higher access uses the same syntax on reserved customer endpoints and grants commercial use.

Commercial POST /v4/historical API for buyer-selected point, line, or polygon locations, fields, one-hour or one-day timestep, and ISO-8601 start/end times. The archive is a reanalysis product blending forecasts and observations; core worldwide-land fields generally run from 2000-01-01 through seven days before present, with 7–90-day processing latency depending on field. Each call is limited to a 31-day range.

Commercial global Timeline API for buyer-selected addresses, partial addresses, coordinates, or US ZIP codes and date ranges. It returns historical daily and hourly records in JSON/CSV; paid plans document 50+ years of history, commercial use, downloads, API access, and multi-location request allowances.

Commercial version-2.0.1 API returning daily or hourly NOAA-reanalysis history for arbitrary latitude/longitude points, postal codes, DMAs, and OnPoint identifiers. Coverage is every landmass worldwide and up to 200 miles offshore; the public specification does not pin the earliest retained date.