The world's climate, in your pocket.
Temperature, rain, sunshine, wind, sea, UV… Climathélie reveals the 22 climate normals of 7,778 cities — and any point on Earth — averaged since 1940. Compare two places, plot the curves, take it all offline.
Get Climathélie — €0.99One-time payment. No subscription. The app opens immediately after checkout.
Works on iPhone, Android and computers.
▶ The 2-minute guided tour
Hélie, our sun, walks you through the app — narrated, with captions. Sound on 🔊
What Climathélie reveals for you
22 variables, one screen
Average and extreme temperatures, precipitation, rainy and snowy days, sunshine, humidity, wind, UV, sea temperature… the complete climate portrait of a place, in clear tables and curves.
From 1940 to today
WMO 1991–2020 normals by default, or any range of years you choose. A precise date, a week, a month, a season, a year: daily to yearly detail, CSV export included.
Compare two places
Nice or Lisbon in October? A/B table with the differences, overlaid charts and curves — the dream tool for planning a trip, a relocation, an event… or winning every weather debate.
The whole world
7,778 built-in cities with instant search that works even without a network — and any point on Earth via its GPS coordinates.
Truly offline
Every place you look up stays available without a connection. Before a trip, pre-download your cities: the atlas travels with you, aeroplane mode included.
No App Store, no Play Store
After checkout, the app opens in your browser. Add it to your home screen in two taps ("Add to Home Screen" on iPhone, "Install app" on Android): it installs with its icon, like a real application.
Who is it for?
For travellers who pick their week by the light and the millimetre of rain. For expats comparing their next life with the old one. For event planners, gardeners, data lovers — and everyone who prefers numbers to impressions.