Winters in Oslo are cold and snowy, with temperatures often below freezing, averaging around -2°C in January. As the season progresses, temperatures gradually rise, but February is still quite chilly, averaging -1°C. Spring arrives in March, bringing warmer temperatures that average around 4°C, marking a significant increase from winter months. Summer months are mild and pleasant, with July typically being the warmest month, averaging 17°C. Autumn brings cooler temperatures again, with October averaging around 9°C, before dropping to averages around 3°C by December.