Winters in St. Paul are extremely cold, with temperatures often plummeting below -20°C and averaging around -7°C in January and -12°C in February. Spring arrives slowly, with March temperatures still quite chilly, but gradually warming up to average highs of 3°C by April, when temperatures can reach as high as 30°C. Summer is mild, with June and July temperatures averaging around 23°C, while August is slightly cooler. Autumn is cool, with September temperatures returning to averages closer to spring's, and October and November experiencing a mix of frosty mornings and mild afternoons. December brings the return of cold weather, with temperatures again dipping below -20°C on occasion.