Pick dates. See what the weather really did.
We read 10 years of airport weather records for your exact dates — about 17,000 instrument observations a year — and turn them into plain probabilities: “rain fell in 4 years out of 10”. Not “40% chance”.
Same dates. Same city. Two different trips.
April 1–5 in Athens, ten-year average: 16.9° by day. Sounds settled. Here is what actually happened:
Five dry days in a row. T-shirt weather, sunscreen before noon.
62 mm of rain across the window. Jacket, umbrella, museum days.
The average says 16.9°. Neither year looked anything like it. That spread is exactly what our reports show — year by year.
Three steps, no magic
Athens is live in test mode. 50 European cities are being prepared next.
Half-hourly airport observations plus the ERA5 climate archive, cross-checked against each other.
Probabilities as “N years out of 10”, typical ranges, records — and every single year on one screen.
Built for a decision, not a headline
Eight slices of every day — 07:00 to 04:00 local — with typical and extreme temperature at each hour, and how it actually feels.
Rain, heat, cold nights, strong gusts, thunderstorms — each as “N years out of 10” with dots you can count.
The table averages hide: all ten years with day/night temperature, rain, gusts and phenomena. Best and roughest year flagged.
A week earlier and a week later, compared: warmer or cooler, drier or wetter — sometimes seven days change the whole trip.
Thunderstorms, hail, squalls, snow — every severe event on your dates in ten years, with the year attached.
“Days around 17°, pack an umbrella, chilly after sunset.” Generated from the numbers, not from vibes.
The climate passport of a place
Beyond the dates: what the place itself is like. Relief and altitude, seismicity in plain words, sunshine through the year — free, for every city we cover.
Where the numbers come from
Two independent sources, cross-checked: instrument observations from the airport (Iowa Environmental Mesonet archive) and the ERA5 climate reanalysis by Copernicus C3S/ECMWF, used under CC-BY 4.0. For Athens they diverge by at most 0.4° on daily highs — we checked, day by day.
Every report says which station it uses and how far it sits from the centre. And everything here is historical statistics, not a forecast — we show the odds, you make the call.
Athens is live — in test mode
Build a report for any dates, free, while WhenToGo is in development. No sign-up, no card. 50 European cities are next in line.