Climate averages 1991–2020
Mulhouse weather
in September.
A mild, moderately wet month: the 4th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Mulhouse: daytime highs average 19.7°C and nights cool to about 11.2°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 74 mm of rain on roughly 11 days, which makes September a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 38 min on an average September day.
The nearest other city in this atlas is Basel (28 km away). In September its highs average 20.1°C, about as warm as Mulhouse, with 95 mm of rain.
Among the 57 cities listed in France, Mulhouse ranks joint 48th of 57 for the warmest September highs and 42nd of 57 for the driest September (rainfall, lowest first). The mean September high of those 57 cities is 21.3°C; Mulhouse is 1.5°C cooler than that mean.
From September to October, average highs fall by 4.8°C to 14.9°C, and monthly rainfall rises from 74 mm to 83 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Mulhouse climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.0°C-1.2°C | -1.2°C | 75 | 12.5 | 8.99 h |
| February | 6.5°C-1.0°C | -1.0°C | 66 | 10.7 | 10.210 h |
| March | 10.7°C1.7°C | 1.7°C | 71 | 12.0 | 11.912 h |
| April | 14.7°C5.0°C | 5.0°C | 68 | 11.8 | 13.614 h |
| May | 18.4°C9.2°C | 9.2°C | 93 | 14.0 | 15.115 h |
| June | 22.1°C12.9°C | 12.9°C | 80 | 13.2 | 15.916 h |
| July | 24.2°C15.1°C | 15.1°C | 81 | 12.9 | 15.616 h |
| August | 24.3°C15.1°C | 15.1°C | 80 | 12.0 | 14.314 h |
| September, selected | 19.7°C11.2°C | 11.2°C | 74 | 10.9 | 12.613 h |
| October | 14.9°C7.0°C | 7.0°C | 83 | 12.1 | 10.911 h |
| November | 9.0°C2.5°C | 2.5°C | 81 | 11.8 | 9.39 h |
| December | 5.4°C-0.4°C | -0.4°C | 92 | 13.2 | 8.58 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Basel in SeptemberSwitzerland · 28 kmHigh 20.1°C · Low 10.8°C · 95 mm rain
- Freiburg in SeptemberGermany · 48 kmHigh 20.0°C · Low 11.8°C · 77 mm rain
- Bern in SeptemberSwitzerland · 90 kmHigh 17.7°C · Low 9.6°C · 88 mm rain
- Villingen-Schwenningen in SeptemberGermany · 93 kmHigh 16.9°C · Low 8.9°C · 93 mm rain
- Strasbourg in SeptemberFrance · 98 kmHigh 20.1°C · Low 11.6°C · 70 mm rain
- Zürich in SeptemberSwitzerland · 101 kmHigh 18.9°C · Low 11.2°C · 123 mm rain
- Luzern in SeptemberSwitzerland · 107 kmHigh 18.9°C · Low 11.6°C · 166 mm rain
- Winterthur in SeptemberSwitzerland · 108 kmHigh 18.7°C · Low 10.8°C · 91 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Mulhouse) is explained once on the Mulhouse year overview and on the Sources, method and limits page.