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 — Duisburg
14 real + 16 synthesised
Tue · Today Clear
+33°+18°3%
Wed · Tomorrow Clear
+34°+22°3%
Thursday 25/6 Clear
+34°+21°3%
Friday 26/6 Partly cloudy
+38°+22°0,2 mm
Saturday 27/6 Clear
+37°+21°2%
Sunday 28/6 Showers
+32°+22°1,0 mm
Monday 29/6 Clear
+32°+20°4%
Tuesday 30/6 Clear
+34°+18°3%
Wednesday 1/7 Clear
+34°+21°2%
Thursday 2/7 Clear
+34°+19°2%
Friday 3/7 Showers
+37°+23°0,3 mm
Saturday 4/7 Showers
+31°+20°0,5 mm
Sunday 5/7 Showers
+34°+19°2,6 mm
Monday 6/7 Partly cloudy
+28°+19°0,1 mm
Tuesday 7/7 Heavy rain
+23°+13°1,4 mm
Wednesday 8/7 Showers
+22°+14°5,1 mm
Thursday 9/7 Partly cloudy (climate normal)
+24°+14°20%
Friday 10/7 Rain (climate normal)
+26°+15°5,2 mm
Saturday 11/7 Partly cloudy (climate normal)
+22°+13°20%
Sunday 12/7 Partly cloudy (climate normal)
+19°+11°20%
Monday 13/7 Rain (climate normal)
+22°+12°9,3 mm
Tuesday 14/7 Partly cloudy (climate normal)
+24°+14°20%
Wednesday 15/7 Partly cloudy (climate normal)
+26°+15°20%
Thursday 16/7 Rain (climate normal)
+25°+14°10,9 mm
Friday 17/7 Partly cloudy (climate normal)
+25°+14°20%
Saturday 18/7 Partly cloudy (climate normal)
+23°+13°20%
Sunday 19/7 Rain (climate normal)
+22°+12°4,4 mm
Monday 20/7 Partly cloudy (climate normal)
+20°+11°20%
Tuesday 21/7 Partly cloudy (climate normal)
+24°+14°20%
Wednesday 22/7 Rain (climate normal)
+24°+14°10,9 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 Duisburg, 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.