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 — Dortmund
14 real + 16 synthesised
Tue · Today Partly cloudy
+34°+21°1,6 mm
Wed · Tomorrow Clear
+32°+20°3%
Thursday 6/8 Clear
+26°+16°1%
Friday 7/8 Clear
+22°+15°7%
Saturday 8/8 Clear
+28°+15°1%
Sunday 9/8 Clear
+30°+18°1%
Monday 10/8 Clear
+29°+16°2%
Tuesday 11/8 Partly cloudy
+29°+19°0,6 mm
Wednesday 12/8 Clear
+31°+18°3%
Thursday 13/8 Partly cloudy
+28°+17°6,9 mm
Friday 14/8 Showers
+19°+13°2,3 mm
Saturday 15/8 Showers
+17°+12°18,0 mm
Sunday 16/8 Partly cloudy
+23°+15°0,1 mm
Monday 17/8 Clear
+25°+15°4%
Tuesday 18/8 Showers
+23°+15°5,1 mm
Wednesday 19/8 Showers
+24°+14°2,2 mm
Thursday 20/8 Partly cloudy (climate normal)
+27°+15°20%
Friday 21/8 Rain (climate normal)
+23°+13°8,1 mm
Saturday 22/8 Partly cloudy (climate normal)
+22°+12°20%
Sunday 23/8 Partly cloudy (climate normal)
+19°+11°20%
Monday 24/8 Rain (climate normal)
+22°+12°11,2 mm
Tuesday 25/8 Partly cloudy (climate normal)
+23°+13°20%
Wednesday 26/8 Partly cloudy (climate normal)
+24°+13°20%
Thursday 27/8 Rain (climate normal)
+26°+15°5,0 mm
Friday 28/8 Partly cloudy (climate normal)
+23°+13°20%
Saturday 29/8 Partly cloudy (climate normal)
+21°+12°20%
Sunday 30/8 Rain (climate normal)
+22°+12°10,9 mm
Monday 31/8 Partly cloudy (climate normal)
+21°+12°20%
Tuesday 1/9 Partly cloudy (climate normal)
+18°+10°20%
Wednesday 2/9 Rain (climate normal)
+22°+12°7,6 mm
Long-range forecast · Dortmund
Dortmund — 30-day analysis
Across the 30-day trend for Dortmund, highs and lows span 10° to 34°, cooling down later in the month. The first 16 days are a real forecast, with rain on about 6 of them; the rest is based on the 1991–2020 climate normals.
How does the long-range forecast work?
Days 1-16 are a real forecast from global models (ICON, ECMWF, GFS): days 1-3 are almost always right, uncertainty grows afterwards, and from day 11 these are tendencies rather than exact values.
From day 17 a serious day-by-day forecast is physically impossible. We therefore show the 1991-2020 climate normals (monthly mean Tmax/Tmin) directly for Dortmund, with mild weekly variation — the typical weather for the season, not a daily prediction.
Rule of thumb: good for “how warm is it usually in late July?”, not for “will it rain on the 27th?”.