Winters in Tumba are typically cold, with temperatures often dropping below freezing point, averaging around -2°C in February. As spring arrives, the temperatures gradually warm up, with March and April seeing average highs of around 3-4°C. Summer months bring warmth, with June and July averaging a pleasant 18-20°C, while August is slightly cooler at 16°C. Autumn sees a return to chillier temperatures, with September averaging 12°C, before dipping again in November. In contrast, the coldest month of December averages around -1°C, but still relatively mild compared to winter's depths.