May 18 is generally a great time to visit Mont Saint-Michel. While there is a slight chance of rain (27%), showers are usually brief. Expect comfortable 17°C weather.
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Essential Travel Info for Mont Saint-Michel
Currency
EUR
€ Euro
Language
French
Driving
Right side
Safety
High Safety
GPI: 1.895
Mont Saint-Michel Weather Forecast for May 18
"Mild & Comfortable. Expect average highs of 17.1°C. 27% chance of rain."
What to Wear in Mont Saint-Michel in May
Based on historical data for May 18, Mont Saint-Michel typically experiences temperatures between 9.6°C and 17.1°C. We recommend packing light jacket, long pants to stay comfortable. With a 27% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Mont Saint-Michel
Smart Suitcase
- Light Jacket
- Long Pants
Average High
17.1°C
Daytime Peak
Average Low
9.6°C
Nighttime Low
Feels Like
17.1°C
🌤️ Feels accurate
Rain Chance
27%
Avg 1.8mm if it rains
Cloud Cover
61%
Overcast
Pressure
1016.8 hPa
Medium volatility
Mont Saint-Michel Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 85% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 21:00
Type I-II
🔴 19 min to burn
Type III-IV
🟡 29 min to burn
Type V-VI
🟢 48 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
12.8°C
Pleasant
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
❄️ Cold Water Hazard
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in France
Flight Traffic
N/A
0/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
N/A
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Mont Saint-Michel
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:23
☀️ Noon
14:03
🌇 Sunset
21:44
⏱️ Daylight
15h 21m
Wind Speed
22.7 km/h
Moderate wind
Sunshine
11.3 hrs
Direct Sun (Cloud-free)
Humidity
76%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Mont Saint-Michel
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Mont Saint-Michel
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Mont Saint-Michel on May 18 averages 17.1°C with a 27% precipitation probability. Wedding/Outdoor Event Score: 87/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Mont Saint-Michel Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
May 23
17.5°C • 29% rain
Score
90
May 24
17.6°C • 28% rain
Score
90
May 25
17.9°C • 29% rain
Score
90
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 18) in other destinations
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📍 Is Mont Saint-Michel Worth Visiting on May 18?
Planning a trip to Mont Saint-Michel on May 18? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 17.1°C with a 27% historical precipitation risk.
💉 Health Advisory: 7 vaccinations are recommended for France, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 16.1°C (polar plunge). Wave conditions are generally lake-like with heights around 0.32m.
📊 Historical Extremes: The hottest May 18 recorded in the last 30 years saw temperatures hit 26°C in 2022, while the coldest dropped to 7.2°C in 2025.