Tomiya's winters are cold, with temperatures often below freezing, but mild spells can bring temperatures up to around 13°C in January. Spring is a gradual warming process, with March marking the beginning of warmer days, and by April, temperatures are consistently above 10°C. Summer months see a steady rise in temperature, with June and July being the hottest, averaging highs around 32-36°C. Autumn brings a gentle cooling trend, with September still warm but October and November seeing temperatures drop back down into single digits. Winters return, bringing chilly conditions once more by December.