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Mont Saint-Michel Weather in August
August in Mont Saint-Michel brings high temperatures, with daytime highs of 22°C (72°F) and nights around 15°C (59°F). Quite a bit of rainfall is expected, around 75 mm (3 in), so pack an umbrella.
Rainfall in Mont Saint-Michel in August
You can expect rain on roughly 12 days based on historical data, averaging 75 mm (3 in) for the month. 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 Mont Saint-Michel in August
August in Mont Saint-Michel is generally excellent, with days reaching 22°C (72°F) and nights settling around 15°C (59°F). Summer occurs in August. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 15°C (59°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. On average, it has the peak temperatures of the year.
Sunshine in Mont Saint-Michel in August
There are approximately 199 hours of sunshine this month, resulting in mostly clear days.If your ideal day consists of dry skies and pleasant temperatures, June, July, August and September typically offer the best circumstances for Mont Saint-Michel.
Mont Saint-Michel Temperature in August
Min Temperature
15°C (59°F)
Max Temperature
22°C (72°F)
Chance of Rain
38%
Precipitation
75 mm (3 in)
Rainy days
12 days
Humidity
81% *
Sunshine
199 hours *
Percentage Sunshine
*
* Data from: Saint Malo, France (37 KM, 23 Miles).
Mont Saint-Michel Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Mont Saint-Michel - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Mont Saint-Michel typically stay consistent throughout August, with daily highs averaging around 22°C (72°F). Nights are cool, with lows typically ranging from 12°C (54°F) to 14°C (57°F).
Average temperatures in August
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 August
Historical weather records for Mont Saint-Michel in August
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 August
Based on weather observations in Mont Saint-Michel between 1976 and 2026, these are the recorded extremes during August.
- The hottest August day on record in Mont Saint-Michel reached 38°C (100°F) (August 12, 2026).
- On August 27, 1986, Mont Saint-Michel saw its coldest August day with temperatures maxing out at 15°C (59°F).
- Mont Saint-Michel registered its coldest August night on August 31, 1986, with temperatures dropping to 5°C (41°F).
- Peak precipitation in August occurred on August 17, 1997, when 50 mm (2 in) of precipitation was measured.
Best Places in France in August
Find out more about the weather in France and which places have the best travel conditions in this month. See all of France in August →
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 Mont Saint-Michel in August
For Mont Saint-Michel in August, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Mont Saint-Michel in August
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
Mont Saint-Michel 3-Day Forecast
More climate data for Mont Saint-Michel
Temperature Rainfall Sunshine Humidity
See the full Mont Saint-Michel climate overview or explore weather in France.
Popular in August
Where to go in August - average daytime high across popular destinations.
Marseille
32°C (90°F) Toulouse
29°C (84°F) Bordeaux29°C (84°F) Lyon28°C (82°F) Cannes27°C (81°F) Nice27°C (81°F) Paris26°C (79°F) Chamonix-Mont-Blanc
18°C (64°F) Bucket list
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The 10 most charming villages in France
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