Climate averages 1991–2020
Södertälje weather
in September.
A mild, moderately wet month: the 4th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Södertälje: daytime highs average 15.9°C and nights cool to about 9.8°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 51 mm of rain on roughly 9 days, which makes September a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 55 min on an average September day.
The nearest other city in this atlas is Huddinge (21 km away). In September its highs average 15.5°C, about as warm as Södertälje, with 50 mm of rain.
Among the 21 cities listed in Sweden, Södertälje ranks joint 7th of 21 for the warmest September highs and joint 6th of 21 for the driest September (rainfall, lowest first). The mean September high of those 21 cities is 15.5°C; Södertälje is 0.4°C warmer than that mean.
From September to October, average highs fall by 6.4°C to 9.5°C, and monthly rainfall falls from 51 mm to 49 mm.
The annual picture
September in context
Monthly precipitation
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
Södertälje climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 0.1°C-4.0°C | -4.0°C | 36 | 8.1 | 7.07 h |
| February | 0.6°C-4.4°C | -4.4°C | 30 | 7.6 | 9.29 h |
| March | 4.2°C-2.4°C | -2.4°C | 30 | 7.7 | 11.812 h |
| April | 10.0°C1.6°C | 1.6°C | 33 | 8.1 | 14.414 h |
| May | 15.5°C6.6°C | 6.6°C | 44 | 9.6 | 16.917 h |
| June | 19.4°C11.2°C | 11.2°C | 66 | 11.4 | 18.418 h |
| July | 22.0°C14.2°C | 14.2°C | 71 | 11.5 | 17.818 h |
| August | 20.8°C13.8°C | 13.8°C | 70 | 12.1 | 15.516 h |
| September, selected | 15.9°C9.8°C | 9.8°C | 51 | 8.7 | 12.913 h |
| October | 9.5°C4.9°C | 4.9°C | 49 | 9.5 | 10.310 h |
| November | 4.5°C1.1°C | 1.1°C | 46 | 9.9 | 7.88 h |
| December | 1.3°C-2.4°C | -2.4°C | 44 | 10.4 | 6.36 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet 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
- Huddinge in SeptemberSweden · 21 kmHigh 15.5°C · Low 10.5°C · 50 mm rain
- Stockholm in SeptemberSweden · 29 kmHigh 15.5°C · Low 10.5°C · 50 mm rain
- Haninge in SeptemberSweden · 30 kmHigh 15.1°C · Low 10.4°C · 51 mm rain
- Sollentuna in SeptemberSweden · 32 kmHigh 15.6°C · Low 9.9°C · 50 mm rain
- Uppsala in SeptemberSweden · 74 kmHigh 15.6°C · Low 9.1°C · 49 mm rain
- Västerås in SeptemberSweden · 77 kmHigh 15.8°C · Low 9.1°C · 52 mm rain
- Norrköping in SeptemberSweden · 106 kmHigh 16.0°C · Low 10.2°C · 52 mm rain
- Örebro in SeptemberSweden · 138 kmHigh 15.6°C · Low 9.4°C · 55 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 Södertälje) is explained once on the Södertälje year overview and on the Sources, method and limits page.