Rovaniemi is typically cool in September.

Maximum temperatures go down compared to the previous month from +17°C to +11°C. The minimum temperature also goes down from +9°C to +4°C.

Pack a sweater and a jacket as there will be cooler temperatures.

Take a look at how September is compared to other months in Rovaniemi:

September weather is still as ok as in August. It’s getting colder in September. From +17°C in the day, the average maximum temperature lowers to +11°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 76 mm to 54 mm. Humidity rises from 77% to 83%. The average wind speed doesn’t change much during September, staying around 2 m/s. The days becoming less sunny, going from 3 sunny days in August to 2 in September.

Next month (October) brings a further decline in the weather.

The climate in Rovaniemi in September has not changed much over the last 43 years.

The average temperature was the lowest in 1985 (+2°C) and the highest in 2020 (+7°C). The driest year was 1997 with only 206 mm of rainfall, and the wettest year was 2020 with 551 mm.

For this page, we’ve looked at the typical weather in Rovaniemi, 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.