Winters in Barnsley are typically cold and unpredictable, with temperatures often dropping below freezing in January and February, but also experiencing brief warm spells. As spring approaches, temperatures gradually rise, but April and May can still be quite cool. Summer brings warmer days, especially in June and July, when temperatures frequently reach the mid-twenties, while August is slightly cooler. Autumn sees a return to more variable weather, with September and October experiencing mild temperatures, but also some chilly snaps. In contrast to these fluctuations, December's winter chill begins to set in once again.