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.
(climate normal)typical range for the season · 1991–2020
Monday 12/10Rain (climate normal)
+17°+9°6.4 mm⌄
Daytime≈14–20°
At night≈6–12°
Rain6.4 mm
(climate normal)typical range for the season · 1991–2020
Tuesday 13/10Partly cloudy (climate normal)
+13°+7°20%⌄
Daytime≈10–16°
At night≈4–10°
Rain20%
(climate normal)typical range for the season · 1991–2020
Wednesday 14/10Partly cloudy (climate normal)
+14°+7°20%⌄
Daytime≈11–17°
At night≈4–10°
Rain20%
(climate normal)typical range for the season · 1991–2020
Thursday 15/10Rain (climate normal)
+14°+7°4.1 mm⌄
Daytime≈11–17°
At night≈4–10°
Rain4.1 mm
(climate normal)typical range for the season · 1991–2020
Friday 16/10Partly cloudy (climate normal)
+14°+7°20%⌄
Daytime≈11–17°
At night≈4–10°
Rain20%
(climate normal)typical range for the season · 1991–2020
Saturday 17/10Partly cloudy (climate normal)
+18°+10°20%⌄
Daytime≈15–21°
At night≈7–13°
Rain20%
(climate normal)typical range for the season · 1991–2020
Sunday 18/10Rain (climate normal)
+17°+9°6.2 mm⌄
Daytime≈14–20°
At night≈6–12°
Rain6.2 mm
(climate normal)typical range for the season · 1991–2020
Monday 19/10Partly cloudy (climate normal)
+16°+9°20%⌄
Daytime≈13–19°
At night≈6–12°
Rain20%
(climate normal)typical range for the season · 1991–2020
Tuesday 20/10Partly cloudy (climate normal)
+15°+8°20%⌄
Daytime≈12–18°
At night≈5–11°
Rain20%
(climate normal)typical range for the season · 1991–2020
Wednesday 21/10Rain (climate normal)
+11°+6°4.5 mm⌄
Daytime≈8–14°
At night≈3–9°
Rain4.5 mm
(climate normal)typical range for the season · 1991–2020
Thursday 22/10Partly cloudy (climate normal)
+13°+7°20%⌄
Daytime≈10–16°
At night≈4–10°
Rain20%
(climate normal)typical range for the season · 1991–2020
Friday 23/10Partly cloudy (climate normal)
+14°+8°20%⌄
Daytime≈11–17°
At night≈5–11°
Rain20%
(climate normal)typical range for the season · 1991–2020
Saturday 24/10Rain (climate normal)
+16°+9°7.0 mm⌄
Daytime≈13–19°
At night≈6–12°
Rain7.0 mm
(climate normal)typical range for the season · 1991–2020
Long-range forecast · Bonn
Bonn — 30-day analysis
Across the 30-day trend for Bonn, highs and lows span 6° to 29°, cooling down later in the month. The first 16 days are a real forecast, with rain on about 3 of them; the rest is based on the 1991–2020 climate normals.
Forecast for Bonn and the surrounding towns, from the same weather models as the city pages. Radar: RainViewer, images from the last two hours.
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 Bonn, 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?”.