Olbia is typically warm in September.

Maximum temperatures go down compared to the previous month from +86°F to +81°F. The minimum temperature also goes down from +70°F to +64°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

September is one of the warmest months in Olbia, here is the comparison with other months:

September typically has worse weather conditions compared to August. It’s getting colder in September. From +86°F in the day, the average maximum temperature lowers to +81°F. Prepare for more rain. Average rainfall goes from 17 mm to 39 mm. Humidity rises from 63% to 70%. The average wind speed doesn’t change much during September, staying around 2 m/s. The days becoming less sunny, going from 21 sunny days in August to 13 in September.

Next month (October) brings a further decline in the weather.

The climate in Olbia in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1980 (+67°F) and the highest in 2022 (+74°F). The driest year was 1987 with only 324 mm of rainfall, and the wettest year was 2018 with 1032 mm.

For this page, we’ve looked at the typical weather in Olbia, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.