Winters in Tomioka are cold and unpredictable, with January and February temperatures often dropping below freezing but occasionally rising into the mid-teens. As spring approaches, temperatures gradually warm up, with March and April averaging around 10-13°C. May marks a significant increase in temperature, with averages reaching 18°C and occasional spikes above 30°C. Summers are hot and humid, with July and August often seeing temperatures soar above 35°C. Autumn brings relief from the heat, but temperatures can still be quite cool, especially in November, before dropping again into winter's chill.