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Saint Malo Weather in September
Thinking of visiting Saint Malo in September? Expect pleasant temperatures reaching 20°C (68°F) during the day, dropping to 14°C (57°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Saint Malo in September
Historically, approximately 13 days this month are expected to have rain, averaging 76 mm (3 in). Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Saint Malo in September
September tends to be one of the excellent months in Saint Malo, with 20°C (68°F) in the afternoon and 14°C (57°F) overnight. September is typically considered a summer month. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights cool down to 14°C (57°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 Saint Malo in September
The area enjoys a balanced 169 hours of sunlight, ensuring it's neither too overcast nor too sunny.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Saint Malo Temperature in September
Min Temperature
14°C (57°F)
Max Temperature
20°C (68°F)
Chance of Rain
43%
Precipitation
76 mm (3 in)
Rainy days
13 days
Humidity
82%
Sunshine
169 hours
Percentage Sunshine
Saint Malo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Saint Malo - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Saint Malo 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 records for Saint Malo in September
Browse day-by-day weather records for Saint Malo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Saint Malo historical weather extremes in September
The extremes listed below come from historical weather data collected in Saint Malo from 1976 through 2026.
- The warmest day in September was on September 14, 2020, with a maximum of 32°C (90°F).
- The lowest daytime temperature in September was 11°C (52°F), recorded on September 30, 1993.
- Nighttime temperatures dropped to 4°C (39°F) on September 20, 1977, marking the coldest September night on record.
- The wettest day in September Saint Malo was on September 13, 2006 with 36 mm (1.4 in) of precipitation.
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
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Saint Malo in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
What To Do in Saint Malo in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming6/10 -
Cycling9/10 -
Walking9/10 -
Camping8/10 -
Outdoor sports9/10
Saint Malo 3-Day Forecast
More climate data for Saint Malo
Temperature Rainfall Sunshine Humidity
See the full Saint Malo climate overview or explore weather in France.
Popular in September
Where to go in September - average daytime high across popular destinations.
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