Climate averages 1991–2020
Strasbourg weather
in September.
A mild, moderately wet month: the 4th warmest and the joint 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Strasbourg: daytime highs average 20.1°C and nights cool to about 11.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 70 mm of rain on roughly 10 days, which makes September a moderately wet month (the joint 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 39 min on an average September day.
The nearest other city in this atlas is Freiburg (66 km away). In September its highs average 20.0°C, about as warm as Strasbourg, with 77 mm of rain.
Among the 57 cities listed in France, Strasbourg ranks joint 41st of 57 for the warmest September highs and joint 37th of 57 for the driest September (rainfall, lowest first). The mean September high of those 57 cities is 21.3°C; Strasbourg is 1.1°C cooler than that mean.
From September to October, average highs fall by 4.9°C to 15.2°C, and monthly rainfall rises from 70 mm to 77 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
Strasbourg climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.4°C-0.5°C | -0.5°C | 72 | 13.2 | 8.89 h |
| February | 6.9°C-0.4°C | -0.4°C | 64 | 11.3 | 10.110 h |
| March | 10.9°C2.1°C | 2.1°C | 70 | 12.4 | 11.912 h |
| April | 15.2°C5.3°C | 5.3°C | 60 | 11.5 | 13.614 h |
| May | 19.0°C9.6°C | 9.6°C | 83 | 13.8 | 15.215 h |
| June | 22.5°C13.2°C | 13.2°C | 79 | 12.5 | 16.116 h |
| July | 24.5°C15.3°C | 15.3°C | 83 | 13.0 | 15.716 h |
| August | 24.5°C15.3°C | 15.3°C | 76 | 12.0 | 14.414 h |
| September, selected | 20.1°C11.6°C | 11.6°C | 70 | 10.3 | 12.613 h |
| October | 15.2°C7.7°C | 7.7°C | 77 | 11.9 | 10.911 h |
| November | 9.4°C3.2°C | 3.2°C | 76 | 11.9 | 9.39 h |
| December | 5.9°C0.5°C | 0.5°C | 87 | 14.6 | 8.48 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
- Freiburg in SeptemberGermany · 66 kmHigh 20.0°C · Low 11.8°C · 77 mm rain
- Karlsruhe in SeptemberGermany · 68 kmHigh 20.5°C · Low 12.0°C · 62 mm rain
- Pforzheim in SeptemberGermany · 77 kmHigh 19.7°C · Low 11.4°C · 64 mm rain
- Villingen-Schwenningen in SeptemberGermany · 80 kmHigh 16.9°C · Low 8.9°C · 93 mm rain
- Saarbrücken in SeptemberGermany · 90 kmHigh 19.5°C · Low 11.4°C · 64 mm rain
- Kaiserslautern in SeptemberGermany · 96 kmHigh 19.4°C · Low 11.7°C · 60 mm rain
- Tübingen in SeptemberGermany · 96 kmHigh 19.2°C · Low 10.4°C · 63 mm rain
- Mulhouse in SeptemberFrance · 98 kmHigh 19.7°C · Low 11.2°C · 74 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 Strasbourg) is explained once on the Strasbourg year overview and on the Sources, method and limits page.