Bolton's winters are typically cool and occasionally icy, with temperatures often below freezing in January and February. As spring approaches, temperatures gradually rise, with March marking a turning point towards milder conditions. Summer months bring warmth, with July being the warmest month on average, but temperatures can still fluctuate significantly between highs of 32°C and lows of 8°C. Autumn is generally mild, with September and October seeing temperatures around 15°C on average, while winter returns with a chill in November and December.