Stockholm weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: June – August
What is the weather like in Stockholm in September?
In September, Stockholm is mild: daytime highs average 16 °C, and nights cool down to about 11 °C. The sea averages 14.3 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain falls on about 9 days, adding up to 48 mm. All in all, September is a good month for a holiday in Stockholm.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 82 | 70 | 26 |
| Day | 20° | 16° | 10° |
| Night | 14° | 11° | 6° |
| Sea | 17° | 14° | 10° |
| Sun | 8 h | 6 h | 4 h |
| Rain days | 11 | 9 | 11 |
More details for September
- Daylight
- 12 h 58 min06:14 – 19:12
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 22 km/haverage daily peak
- Cloud cover
- 61 %on average
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+2Europe/Stockholm
How the score comes together
- Temperatureweight 50 %80 %
- Sunshineweight 20 %52 %
- Few rainy daysweight 30 %67 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- A jumper for the evenings
- Rain jacket or umbrella
Stockholm in September: quick answers
Is Stockholm hot in September?
No. In September, Stockholm is mild: daytime highs average 16 °C and nights drop to about 11 °C.
Can you swim in Stockholm in September?
Only if you don't mind cold water: in September the sea averages just 14.3 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Stockholm in September?
Rain falls on about 9 days, adding up to 48 mm.
Stockholm month by month
The whole year in StockholmAll destinations: SwedenWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)