Nashua's winters are frigid and snowy, with temperatures often dropping below -16°C in January and February. As the seasons transition, March brings a gentle warming trend, with temperatures rising to averages of around 4°C. Spring arrives in April, bringing warmer days with temperatures occasionally reaching up to 25°C, but still experiencing chilly mornings. Summer months from June to August are warm to hot, with average highs often above 22°C, while September and October bring a return to more moderate temperatures, with occasional cooler periods. Winters, particularly December, can be quite cold again, with temperatures sometimes dropping below -12°C.