Winters in Omiyacho are harsh and cold, with temperatures often dropping below -30°C. Even the warmest days of January and December barely reach above 20°C, making them relatively mild compared to the coldest periods. Spring brings a slow warming trend, with March and April averaging around 6-8°C, but still experiencing occasional chilly mornings. Summers are warm, with July and August temperatures frequently reaching above 30°C, while September's heat begins to wane. Autumn is cool and crisp, with November's temperature plummeting back down towards freezing.