The project
BestDateWeather is a free decision-making tool for travellers. The concept is straightforward: we cross-reference 10 years of weather data (temperature, rain, sunshine, wind, humidity) to assign a score from 0 to 10 to every month of every destination.
The result: a clear, data-driven answer to "when should I go?" — for over 500 destinations worldwide.
How it works
For each destination and month, our algorithm analyses historical climate data from Open-Meteo (sources: ECMWF, DWD, NOAA, Météo-France). Each parameter (max temperature, rainy days, sunshine hours, humidity, wind, sea temperature for coastal areas, snow for ski resorts) is weighted and combined into a single score.
The interactive app goes further: it fetches real-time forecasts (D+0 to D+7 via Open-Meteo) and seasonal outlooks (D+30 to D+270 via ECMWF) to refine recommendations.
What we are not
BestDateWeather is not a weather forecasting service. We don't predict whether it will rain on 15 July in Lisbon. We tell you that historically, July in Lisbon averages 0.5 rainy days, 29°C and 11 hours of sunshine — resulting in an excellent score.
We are not a travel agency either. We provide climate intelligence; booking, budgeting and logistics decisions remain yours.
The company
BestDateWeather is published by BestDateWeather EI micro, a micro-enterprise registered in France.
It is an independent, self-funded project with no external investors or targeted advertising. The site is hosted on Vercel (global CDN) and weather data is provided by Open-Meteo.com under the CC BY 4.0 licence.