Winter is harsh in Warsaw, with temperatures often dropping below -20°C in January and February. The coldest month is usually January, but the average temperature remains relatively stable around -2°C throughout these two months. Spring arrives slowly in March, with temperatures gradually warming up to 20°C, while April and May see a significant increase in warmth, with averages rising to 7°C and 12°C respectively. Summer brings warm days, with July being the hottest month, but temperatures still rarely exceed 33°C. Autumn is mild, with September averaging 13°C, before cooling down to around 5°C by November.