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 — Besançon
14 real + 16 synthesised
Tue · Today Clear
+29°+13°3%
Wed · Tomorrow Clear
+29°+16°5%
Thursday 18/6 Partly cloudy
+32°+16°0,1 mm
Friday 19/6 Showers
+32°+16°1,5 mm
Saturday 20/6 Partly cloudy
+34°+15°0,1 mm
Sunday 21/6 Clear
+33°+17°5%
Monday 22/6 Showers
+35°+19°1,2 mm
Tuesday 23/6 Cloudy
+28°+18°13%
Wednesday 24/6 Clear
+28°+13°1%
Thursday 25/6 Clear
+29°+12°2%
Friday 26/6 Clear
+29°+13°2%
Saturday 27/6 Clear
+31°+13°2%
Sunday 28/6 Clear
+36°+17°17%
Monday 29/6 Clear
+37°+17°2%
Tuesday 30/6 Rain (climate normal)
+23°+12°3,9 mm
Wednesday 1/7 Partly cloudy (climate normal)
+27°+15°20%
Thursday 2/7 Partly cloudy (climate normal)
+27°+15°20%
Friday 3/7 Rain (climate normal)
+27°+15°4,6 mm
Saturday 4/7 Partly cloudy (climate normal)
+27°+14°20%
Sunday 5/7 Partly cloudy (climate normal)
+23°+13°20%
Monday 6/7 Rain (climate normal)
+26°+14°4,2 mm
Tuesday 7/7 Partly cloudy (climate normal)
+26°+14°20%
Wednesday 8/7 Partly cloudy (climate normal)
+29°+16°20%
Thursday 9/7 Rain (climate normal)
+27°+15°5,1 mm
Friday 10/7 Partly cloudy (climate normal)
+28°+15°20%
Saturday 11/7 Partly cloudy (climate normal)
+27°+15°20%
Sunday 12/7 Rain (climate normal)
+24°+13°6,4 mm
Monday 13/7 Partly cloudy (climate normal)
+23°+12°20%
Tuesday 14/7 Partly cloudy (climate normal)
+27°+15°20%
Wednesday 15/7 Rain (climate normal)
+29°+16°4,8 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 Besançon), 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