The maximum temperature in Seljord is on average 8°C over the year, with values generally ranging between -3°C in January and 20°C in July. Precipitation is fairly high, with about 1,629 mm per year. It ranges from 68 mm in April to 168 mm in October.
The climate is suitable for a trip to Seljord in: May, June, July, August and September. Nevertheless, the months when the weather is really pleasant are June, July and August.
For winter sports and snow, the best months are January, February and December.
For hiking and trekking, the best months are May, June, July and August.
In terms of crowd levels, the quietest periods are in November, while crowding is high in June, August and July.