Belfast's winters are cool and occasionally frosty, with temperatures often struggling to rise above freezing in January and February. As spring approaches, temperatures gradually warm up, reaching a pleasant average of around 9°C by May. Summer months bring warmer days, with July being the warmest month on average, but temperatures can still dip into single digits at night. Autumn brings a return to cooler temperatures, with September and October experiencing mild temperatures before the winter chill sets in again. Overall, Belfast's climate is generally mild, with temperature fluctuations between seasons relatively moderate.