September · France
Best time to visit Cassis in September Weather, crowds & prices
Weather in Cassis in September
Average temperature 22°C, 56 mm of rain, about 18 days with 6+ hours of sunshine and 75% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
8.3/10
Ranked #4 of 12 months
- Avg temp
- 22°C
- Rainfall
- 56 mm
- Humidity
- 75%
- Days with 6h+ sun
- 18
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Cassis scores 8.3/10 for beach and coastal travel - an above-average month (#4 of 12). Expect around 22°C, 56 mm of rain, and roughly 18 days with 6+ hours of sunshine this month.
Cassis is a Provençal fishing port east of Marseille, gateway to the limestone calanques along the coast.
September in Cassis — reliably good (4th best month)
September averages 22°C (72°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 56 mm, so plan one flexible day in three; you still get about 18 days with 6+ hours of sunshine and 12.3 hours of daylight.
It scores 8.3/10 here, 4th of 12 months, against 9.9/10 in the destination's best month.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
Plan for mid-season pricing, with crowds are moderate.
Flexible dates? July scores 1.6 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Cassis in September?
- In September, Cassis averages 22°C, 56 mm of rain, and about 18 days with 6+ hours of sunshine. Its climate-comfort score is 8.3/10.
- Is September a good time to visit Cassis?
- September earns a 8.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Cassis in September?
- Expect about 56 mm of rain in September. Average humidity is 75% and there are about 18 days with 6+ hours of sunshine.
Curated in Cassis
Tickets & experiences
Things to do in Cassis
Cassis, France. Live activities and tours from GetYourGuide, matched to this destination.