Weersvoorspelling
Climate Forecast
Predict temperature for a date far in the future, based on a weighted blend of three historical windows — instead of the usual 10-14 day forecast horizon.
Goal
Regular weather forecasts become unreliable past a week or two. For longer-term planning (an event three months out, say) there's little better than guessing — even though historical climate data actually holds useful signal.
Climate Forecast combines three non-overlapping periods — everything older than 40 years, 10 to 40 years back, and the last 10 years — into one weighted forecast per region and calendar day (default 20/35/45%, adjustable). The three individual components are also shown, so you can spot a warming trend yourself.
Status: data is still being filled in
336 regions across 30 countries, added gradually by a long-running background job. Querying a region that isn't computed yet returns a clear status instead of an error.
Try it yourself
Testing tip: addresses in the Netherlands and Germany currently have the best chance of already being available.