Inuma's winters are chilly, with temperatures often below freezing in January and December, but mild spells can bring temperatures up to around 18°C. As spring approaches, temperatures gradually rise, with March being the first month to see averages above 10°C. Summer months of June to August bring warm to hot conditions, with July typically being the hottest month, while September sees a return to more moderate temperatures. Autumn is generally mild, but can be quite cool in October and November, before winter's chill sets back in.