Ajaccio Weather in September

In Ajaccio, September brings high daytime temperatures around 23°C (73°F), with nights cooling to 17°C (63°F). Some rainfall is to be expected.

Rainfall in Ajaccio in September

Historically, approximately 7 days this month are expected to have rain, averaging 58 mm (2.3 in). When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.

Temperature in Ajaccio in September

The perfect temperature in Ajaccio in September makes it a solid month to visit, with 23°C (73°F) during the day and 17°C (63°F) at night. September is typically considered a summer month. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 17°C (63°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Ajaccio in September

Expect a lot of sunshine this month, with about 262 hours of sun. These sunny conditions add to the overall experience.

Wind Speed in Ajaccio in September

September has wind speeds averaging 3 m/s (6 knots). You can expect comfortable light winds that steadily move flags and feel mild throughout the day. Since this is an average, daily conditions vary from gentle winds to more active breezes.

Average water temperature in September

At 22°C (72°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Ajaccio.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Corsica, check out our Ajaccio's climate page.

Ajaccio Temperature in September

Min Temperature 17°C (63°F)  

Max Temperature 23°C (73°F)  

Water Temperature 22°C (72°F)  

Chance of Rain 22%  

Precipitation 58 mm (2.3 in)  

Rainy days 7 days  

Humidity 77%  

Windspeed 3 m/s (6 knots)  

Sunshine 262 hours  

Percentage Sunshine 72%  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Ajaccio typically stay consistent throughout September, with daily highs averaging around 23°C (73°F). Nights are pleasant, with lows typically ranging from 14°C (57°F) to 17°C (63°F).

Average temperatures in September

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Historical weather for Ajaccio in September

Browse day-by-day weather records for Ajaccio spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Ajaccio historical weather extremes in September

Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Ajaccio.

• The warmest day in September was on September 26, 1982, with a maximum of 35°C (95°F).
• The coldest September day was on September 25, 2002, with a maximum of 18°C (64°F).
• The coldest night in September in Ajaccio was on September 24, 1977, with a minimum of 8°C (46°F).

What to Wear in Ajaccio in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. The water temperature sits at about 22°C (72°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Ajaccio in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

8/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Corsica, check out our Ajaccio's climate page.

More climate data for Ajaccio

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Ajaccio climate overview or explore weather in Corsica.