Olbia's winter is mild, with temperatures ranging from just below freezing to the mid-teens Celsius. Mornings can be chilly in January and December, but afternoons often bring warmer conditions. Spring arrives in March, bringing temperatures that slowly rise towards pleasant highs of up to 24°C. Summer months are hot, with July and August averaging highs above 38°C. Autumn is similarly warm, with October's highs reaching the mid-twenties Celsius before cooling down again as winter returns.