September weather forecast
Stockholm, Sweden

Arriving at September, Stockholm welcomes the pleasant shades of autumn. Milder temperatures down to 15.1°C (59.2°F) provide the perfect setting to experience the city's parks and gardens painted in vivid autumnal hues. Daylight, although reduced to 12.8 hours, remains ample for various urban activities and sightseeing tours. However, rainfall also marks this month, adding a soothing touch to the crisp autumn air. September distinctly portrays nature's transitional play from warmer to colder months in Stockholm.

Temperature

With September's onset, the average high-temperature in Stockholm recedes from August's pleasant 20.4°C (68.7°F) to a refreshing 15.1°C (59.2°F). Stockholm experiences a nighttime temperature average of 9°C (48.2°F) during September.

Rainfall

In Stockholm, Sweden, during September, the rain falls for 8 days and regularly aggregates up to 52mm (2.05") of precipitation. In Stockholm, during the entire year, the rain falls for 99 days and collects up to 528mm (20.79") of precipitation.

Sea temperature

In Stockholm, in September, the average water temperature is 14.9°C (58.8°F).
Note: Beware when you're in 14.9°C (58.8°F) waters; 13°C (55.4°F) is chilling and anything below 10°C (50°F) could cause breathing hindrance and a sudden cold shock, given your physical condition.

Daylight

In September, the average length of the day is 12h and 50min.
On the first day of September, sunrise is at 05:45 and sunset at 19:49. On the last day of the month, sunrise is at 06:51 and sunset at 18:23 CEST.

Sunshine

The average sunshine in September is 5.1h.

UV index

The average daily maximum UV index in September in Stockholm is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high UV index of 3 in September translates into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.