Borlange's winters are long and cold, with temperatures often dropping below -20°C in January and February. As spring approaches, temperatures gradually rise, reaching averages around 0°C by March and 10°C by May. Summers are mild to warm, with July being the warmest month, averaging around 18°C. Autumn brings a return to cooler temperatures, with October experiencing average highs similar to those of April. The coldest months are December and January, while the mildest are June, July, and August.