Winters in Lulea are harsh and cold, with temperatures often dropping below -30°C and averaging around -12°C in January. Spring brings a slow warming trend, with temperatures gradually increasing to an average of 2°C by April. Summers are mild and pleasant, with average highs reaching up to 18°C in July, while winters remain bitter, with temperatures plummeting back down to -30°C in November. Autumn is characterized by moderate temperatures, ranging from around 0°C to 15°C, before the cold sets in once more. Overall, Lulea's climate is marked by significant seasonal temperature fluctuations, with long, dark winters and short, mild summers.