Weather in Stockholm in September 2025
Average weather
Average temperature in Stockholm in September
The expected average maximum temperature in September is +19°C with a maximum of +24°C and a minimum of +7°C.
The average maximum temperature goes down 12% by the end of the month, compared with the beginning of the month, from +18°C to +16°C.
Is Stockholm warm or cold in September?
Stockholm is typically mild in September.
Maximum temperatures go down compared to the previous month from +20°C to +16°C. The minimum temperature also goes down from +13°C to +9°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how September is compared to other months in Stockholm:
Water temperature in Stockholm in September
Water in Stockholm in September is Cold. It varies from +11°C to +18°C, with an average of +14°C. This is almost similar to the air temperature, which averages +16°C.
The water temperature in September is one of the warmest of the entire year:
Can you swim in Stockholm in September?
Climate in Stockholm in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +20°C | +16°C | +10°C | ||||
| Min. temperature | ||||||
| +3°C | -1°C | -8°C | ||||
| Max. temperature | ||||||
| +31°C | +26°C | +19°C | ||||
| Rainfall | ||||||
| 73 mm | 51 mm | 50 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +19°C | +14°C | +9°C | ||||
| Humidity | ||||||
| 75% | 79% | 83% | ||||
| Air pressure | ||||||
| 1011 HPa | 1012 HPa | 1011 HPa | ||||
| Sunny days | ||||||
| 5 | 5 | 4 | ||||
| Cloudy days | ||||||
| 6 | 10 | 12 | ||||
| Rainy days | ||||||
| 18 | 15 | 14 | ||||
| Snowy days | ||||||
| 0 | 0 | 1 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +20°C in the day, the average maximum temperature lowers to +16°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 73 mm to 51 mm. Humidity rises from 75% to 79%. The average wind speed doesn’t change much during September, staying around 2 m/s. The amount of sunny days stay about the same, averaging 5 sunny days during the month.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Stockholm is gradually increasing during September, going from 1 m/s to 4 m/s over the course of the month.
Rain
How was the weather last September in Stockholm?
Climate Change over Years
The climate in Stockholm in September has not changed much over the last 43 years.
The average temperature was the lowest in 1985 (+7°C) and the highest in 2020 (+12°C). The driest year was 2018 with only 313 mm of rainfall, and the wettest year was 2023 with 835 mm.
FAQ
Is September a good time to visit Stockholm?
Can you sunbathe in Stockholm in September?
Can you swim in Stockholm in September?
Is Stockholm rainy in September?
Is it sunny in Stockholm in September?
Other cities in Sweden
Monthly weather in Stockholm
Source of the data
For this page, we’ve looked at the typical weather in Stockholm, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.