Suifenhe's winters are brutally cold, with temperatures plummeting as low as -28°C in January and averaging around -17°C. Spring arrives slowly, with March temperatures gradually warming up to an average of -1°C before rising further in April, which sees highs of 22°C on occasion. Summers are mild, with July typically being the warmest month, but even then temperatures rarely exceed 36°C. Autumn is similar to spring, with a gradual cooling trend that brings temperatures back down into single digits by November. Winters return with a vengeance, with December often seeing temperatures drop below -30°C.