Days 1-14 are a real forecast from global weather models. Days 15-30 are season-typical values based on Météo-France climate normals 1991-2020 — good for planning, NOT an exact forecast that far ahead.
30 days — Villeurbanne
14 real + 16 synthesised
Sun · Today Clear
+28°+14°5%
Mon · Tomorrow Clear
+27°+13°3%
Tuesday 16/6 Clear
+28°+12°3%
Wednesday 17/6 Clear
+33°+15°2%
Thursday 18/6 Clear
+35°+18°2%
Friday 19/6 Clear
+34°+19°2%
Saturday 20/6 Clear
+35°+19°1%
Sunday 21/6 Partly cloudy
+38°+19°0,1 mm
Monday 22/6 Clear
+39°+21°1%
Tuesday 23/6 Clear
+35°+21°3%
Wednesday 24/6 Showers
+35°+21°0,4 mm
Thursday 25/6 Showers
+36°+20°1,5 mm
Friday 26/6 Showers
+35°+20°1,0 mm
Saturday 27/6 Partly cloudy
+38°+19°0,2 mm
Sunday 28/6 Rain (climate normal)
+24°+13°7,6 mm
Monday 29/6 Partly cloudy (climate normal)
+28°+16°20%
Tuesday 30/6 Partly cloudy (climate normal)
+27°+15°20%
Wednesday 1/7 Rain (climate normal)
+29°+17°5,9 mm
Thursday 2/7 Partly cloudy (climate normal)
+28°+16°20%
Friday 3/7 Partly cloudy (climate normal)
+25°+14°20%
Saturday 4/7 Rain (climate normal)
+26°+15°5,9 mm
Sunday 5/7 Partly cloudy (climate normal)
+27°+16°20%
Monday 6/7 Partly cloudy (climate normal)
+31°+17°20%
Tuesday 7/7 Rain (climate normal)
+31°+18°3,9 mm
Wednesday 8/7 Partly cloudy (climate normal)
+29°+17°20%
Thursday 9/7 Partly cloudy (climate normal)
+26°+15°20%
Friday 10/7 Rain (climate normal)
+27°+15°6,6 mm
Saturday 11/7 Partly cloudy (climate normal)
+25°+14°20%
Sunday 12/7 Partly cloudy (climate normal)
+28°+16°20%
Monday 13/7 Rain (climate normal)
+31°+18°5,9 mm
How does the long-range forecast work?
Days 1-14: Fetched live from global weather models (ECMWF, GFS) with statistical correction. Reliability ~85% for days 1-3, ~60% for days 7-10, ~45% for days 11-14.
Days 15-30: A real forecast does not exist that far ahead (a chaotic system). Instead we show season-typical values: the month’s average Tmax/Tmin from Météo-France climate normals 1991-2020 (Paris baseline with latitude correction for Villeurbanne), with mild weekly variation.
Use: "Roughly how warm is it usually in Paris in the last week of July?" — a good question for days 15-30. "Will it rain on 27 May?" — no serious forecast can say.
Official weather data from Météo-France (French Meteorological and Hydrological Institute) · Météo-France · French Museum of Natural History · Bison Futé