Hagerstown's winters are cold, with temperatures often below freezing and averaging around 1°C in January. As spring approaches, temperatures gradually rise, reaching averages of 8°C by March. By April and May, temperatures continue to increase, with the latter month seeing averages reach as high as 17°C. Summer months bring warmer temperatures, with July and August averaging around 25°C, although occasionally reaching highs above 38°C. Autumn brings a return to cooler temperatures, with November and December averages dipping back down into the mid-0s.