Winters in Saint John are long and cold, with temperatures often dipping below -20°C in January and February, averaging around -5°C. As spring arrives in March, temperatures gradually warm up, reaching averages of around 0°C by the end of the month. Summer is mild and pleasant, with June and July averages ranging from 17-18°C, while August is slightly warmer still. Autumn brings a return to cooler temperatures, with September averaging around 15°C before dropping off in November, which sees averages of around 2°C. Frosts are common during December, but temperatures can occasionally rise into the mid-teens.