The services behind Climara forecasts
Climara combines independent weather and hazard services, then transforms their data into its own summaries, comparisons and confidence indicators.
Last updated: 10 August 2026Forecast, geocoding and climate data
Forecast, historical, ensemble, geocoding and climate requests are primarily delivered through Open-Meteo. Climara combines and transforms those responses rather than reproducing a provider's interface. Open-Meteo API data is made available under the CC BY 4.0 licence. Location search data exposed through Open-Meteo is based on GeoNames; the same source supplies the stored centre points used to open Climara's curated city forecast pages without an extra search request. Climate summaries use the Open-Meteo Climate API and model data from the CMIP6 programme.
Forecast models
Depending on location and availability, Climara compares model guidance that includes ECMWF IFS, NOAA GFS and DWD ICON families. These model feeds are requested through Open-Meteo endpoints and then processed by Climara's comparison and confidence logic.
Radar
Radar timelines and imagery are supplied by RainViewer. Radar coverage, update timing and source-station availability vary by country and location. Weather data by RainViewer.
Climara short-range probability adjustment
Climara analyses recent radar frames in two zones: a small zone around the selected point and a wider city-area zone, as well as persistent precipitation moving toward the location. Radar reflectivity, area coverage and persistence are combined into a short-range severity estimate, so weak and strong echoes do not receive the same probability adjustment. During the first six forecast hours this evidence can raise the displayed hourly precipitation probability, with the strongest influence in the first two hours. The first part of the 15-minute timeline can also be radar-adjusted when fresh persistent echoes cover the selected area. City-level locations remain area estimates rather than street-level confirmation. The underlying model probability is retained and the interface marks values that were radar-adjusted.
Surface observations
Where available, nearby METAR observations are obtained from the US National Weather Service Aviation Weather Center Data API. METAR stations are not available near every location and are used only as an additional comparison signal.
Natural hazards
Active natural-event context can be obtained from NASA EONET and the Global Disaster Alert and Coordination System (GDACS). These feeds are contextual information and do not replace official local alerts or emergency instructions.
Typography
Climara self-hosts the official Google Fonts build of Nunito Sans. The font is distributed under the SIL Open Font License 1.1. The unmodified licence is deployed with the font, while the official Google Fonts family directory records its source. The original font sources are retained with the project.
Independent processing
Provider names identify data origins only. They do not imply that a provider endorses, certifies or operates Climara. Availability, licences, model versions and provider terms can change independently.