Days 1-16 are a real forecast from global weather models. Days 17-30 are season-typical values based on DWD climate normals 1991-2020 — good for planning, NOT an exact forecast that far ahead.
30 days — Hagen
14 real + 16 synthesised
Mon · Today Partly cloudy
+29°+19°12%
Tue · Tomorrow Clear
+31°+15°5%
Wednesday 24/6 Clear
+34°+19°4%
Thursday 25/6 Clear
+32°+18°3%
Friday 26/6 Clear
+36°+19°2%
Saturday 27/6 Clear
+35°+20°3%
Sunday 28/6 Showers
+37°+20°4,7 mm
Monday 29/6 Showers
+21°+17°4,7 mm
Tuesday 30/6 Showers
+15°+13°0,6 mm
Wednesday 1/7 Clear
+23°+12°5%
Thursday 2/7 Clear
+26°+9°3%
Friday 3/7 Partly cloudy
+28°+15°5%
Saturday 4/7 Showers
+25°+17°0,8 mm
Sunday 5/7 Clear
+27°+15°6%
Monday 6/7 Showers
+23°+14°1,6 mm
Tuesday 7/7 Showers
+23°+13°1,6 mm
Wednesday 8/7 Partly cloudy (climate normal)
+25°+13°20%
Thursday 9/7 Rain (climate normal)
+23°+12°13,0 mm
Friday 10/7 Partly cloudy (climate normal)
+23°+12°20%
Saturday 11/7 Partly cloudy (climate normal)
+21°+11°20%
Sunday 12/7 Rain (climate normal)
+20°+10°8,8 mm
Monday 13/7 Partly cloudy (climate normal)
+24°+13°20%
Tuesday 14/7 Partly cloudy (climate normal)
+26°+14°20%
Wednesday 15/7 Rain (climate normal)
+26°+14°11,6 mm
Thursday 16/7 Partly cloudy (climate normal)
+24°+12°20%
Friday 17/7 Partly cloudy (climate normal)
+22°+12°20%
Saturday 18/7 Rain (climate normal)
+21°+11°6,7 mm
Sunday 19/7 Partly cloudy (climate normal)
+20°+10°20%
Monday 20/7 Partly cloudy (climate normal)
+22°+11°20%
Tuesday 21/7 Rain (climate normal)
+24°+12°10,5 mm
How does the long-range forecast work?
Days 1-16: Fetched live from global weather models (ECMWF, GFS, ICON) with statistical correction. Reliability ~85% for days 1-3, ~60% for days 7-10, ~45% for days 11-16.
Days 17-30: 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 DWD climate normals 1991-2020 directly for Hagen, with mild weekly variation.
Use: "Roughly how warm is it usually in Berlin in the last week of July?" — a good question for days 17-30. "Will it rain on 27 May?" — no serious forecast can say.