The March 2026 (and Winter 2025) aggregations are available online in ForecastWatch. Also, the previous Year-to-Date (YTD) aggregations have been replaced with a rolling 12-month aggregation. This means it will always show the rolling last 12 months of aggregated data, rather than growing throughout the year.
This month, you should see data for the 2 national government forecasters: AEMET (Spain) and DWD MOSMIX (Germany) as well as the 5 global model outputs we added last month.
This month, we added 7 more providers: 1 government provider, 2 commercial providers, and 4 Ensemble Means forecasts.
- Met Eireann — Ireland’s national meteorological service, offering 9-day forecasts scoped to the UK and Ireland
- WeatherAPI.com — Global hourly-to-daily aggregation provider
- Meteosource — Global 30-day daily forecast provider
- Ensemble providers (we are taking the mean forecast, but we are also calculating other statistics, including a confidence level):
- GFS Ensemble
- AIGEFS Ensemble
- ECMWF IFS Ensemble
- ECMWF AIFS Ensemble
Starting this month, our previous US-only climate forecast (which had forecasted using the CLIM84 climatological normals) will be replaced with “Climate Global.” This new forecast is worldwide and uses a computed rolling 30-year climate normal derived from the ERA5 reanalysis data.
Additionally, we’ve improved the existing providers which will result in better forecasts for the following:
- NWX has moved from the old XML-based API to the new JSON-based API at api.weather.gov. We are also retiring the old website scraping NWS provider. We have renamed “NWS Digital Forecast” to “National Weather Service” to reflect this. The old website scraper has been renamed “NWS Website”.
- Fixed precip_amt being passed as precip_pct, which caused POP values over 100% for Weatherbit.
- Migrated Environment Canada from HTML scraping to its retail JSON API
