Winters in Fussa are harsh, with temperatures often plummeting below -30°C and averaging around -1°C. The coldest months are January and December, with occasional warmer spells bringing temperatures up to 18-22°C. Spring arrives gradually, with March experiencing mild temperatures ranging from -21°C to 24°C, while April and May see a steady rise in temperature, averaging 8-13°C. Summers are warm to hot, with July and August being the hottest months, featuring temperatures above 30°C for most of the time, peaking at 36-39°C. As autumn approaches, temperatures drop again, with September and October experiencing mild days but cooler nights, before winter sets back in.