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
Saturday 28/11Rain (climate normal)
+9°+3°5.6 mm⌄
Daytime≈6–12°
At night≈0–6°
Rain5.6 mm
(climate normal)typical range for the season · 1991–2020
Sunday 29/11Partly cloudy (climate normal)
+7°+2°20%⌄
Daytime≈4–10°
At night≈-2–5°
Rain20%
(climate normal)typical range for the season · 1991–2020
Monday 30/11Partly cloudy (climate normal)
+7°+2°20%⌄
Daytime≈4–10°
At night≈-1–5°
Rain20%
(climate normal)typical range for the season · 1991–2020
Tuesday 1/12Rain (climate normal)
+3°-1°5.9 mm⌄
Daytime≈0–6°
At night≈-4–2°
Rain5.9 mm
(climate normal)typical range for the season · 1991–2020
Wednesday 2/12Partly cloudy (climate normal)
+7°+1°20%⌄
Daytime≈4–10°
At night≈-2–4°
Rain20%
(climate normal)typical range for the season · 1991–2020
Thursday 3/12Partly cloudy (climate normal)
+8°+2°20%⌄
Daytime≈5–11°
At night≈-1–5°
Rain20%
(climate normal)typical range for the season · 1991–2020
Friday 4/12Rain (climate normal)
+7°+2°5.5 mm⌄
Daytime≈4–10°
At night≈-1–5°
Rain5.5 mm
(climate normal)typical range for the season · 1991–2020
Saturday 5/12Partly cloudy (climate normal)
+7°+1°20%⌄
Daytime≈4–10°
At night≈-2–4°
Rain20%
(climate normal)typical range for the season · 1991–2020
Sunday 6/12Partly cloudy (climate normal)
+6°+1°20%⌄
Daytime≈3–9°
At night≈-2–4°
Rain20%
(climate normal)typical range for the season · 1991–2020
Monday 7/12Rain (climate normal)
+4°0°2.8 mm⌄
Daytime≈1–7°
At night≈-3–3°
Rain2.8 mm
(climate normal)typical range for the season · 1991–2020
Tuesday 8/12Partly cloudy (climate normal)
+4°0°20%⌄
Daytime≈1–7°
At night≈-3–3°
Rain20%
(climate normal)typical range for the season · 1991–2020
Wednesday 9/12Partly cloudy (climate normal)
+6°+1°20%⌄
Daytime≈3–9°
At night≈-2–4°
Rain20%
(climate normal)typical range for the season · 1991–2020
Thursday 10/12Rain (climate normal)
+10°+3°2.9 mm⌄
Daytime≈7–13°
At night≈0–6°
Rain2.9 mm
(climate normal)typical range for the season · 1991–2020
Long-range forecast · Mainz
Mainz — 30-day analysis
Across the 30-day trend for Mainz, highs and lows span -1° to 12°, cooling down later in the month. The first 16 days are a real forecast, with rain on about 11 of them; the rest is based on the 1991–2020 climate normals.
Forecast for Mainz 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 Mainz, 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?”.