Mont Saint-Michel Weather in September
September in Mont Saint-Michel sees daytime temperatures around 20°C (68°F) and lows of 13°C (55°F) at night. With around 84 mm (3.3 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Mont Saint-Michel in September
Analyzing past climate data, one can expect approximately 13 days of rain, averaging 84 mm (3.3 in). The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in Mont Saint-Michel in September
If you're visiting Mont Saint-Michel in September, expect perfect temperatures with highs of 20°C (68°F) and overnight lows of 13°C (55°F). September is part of the summer season. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 13°C (55°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Mont Saint-Michel in September
The area enjoys a moderate level of sunlight, with around 169 hours. It's a good balance between sunny and cloudy days.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit France, check out our Mont Saint-Michel's climate page.
Mont Saint-Michel Temperature in September
Min Temperature
13°C (55°F)
Max Temperature
20°C (68°F)
Chance of Rain
42%
Precipitation
84 mm (3.3 in)
Rainy days
13 days
Humidity
82% *
Sunshine
169 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Mont Saint-Michel typically stay consistent throughout September, with daily highs averaging around 20°C (68°F). Nights are cool, with lows typically ranging from 11°C (52°F) to 13°C (55°F).
Average temperatures in September
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
Historical weather for Mont Saint-Michel in September
Browse day-by-day weather records for Mont Saint-Michel spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mont Saint-Michel historical weather extremes in September
Our historical data for Mont Saint-Michel spans 1976 to 2025, revealing these weather extremes.
- The warmest day in September was on September 14, 2020, with a maximum of 33°C (91°F).
- The coldest September day was on September 30, 1993, with a maximum of 11°C (52°F).
- Nighttime temperatures dropped to 4°C (39°F) on September 20, 1977, marking the coldest September night on record.
- The heaviest September precipitation occurred on September 13, 2006, when 36 mm (1.4 in) of precipitation fell.
Best Places in France in September
Find out more about the weather in France and which places have the best travel conditions in this month. See all of France in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Mont Saint-Michel 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. Expect heavy rainfall, so bring good rain protection and waterproof bags. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Mont Saint-Michel in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit France, check out our Mont Saint-Michel's climate page.
Temperature Rainfall Sunshine Humidity
See the full Mont Saint-Michel climate overview or explore weather in France.
