Weather in May
Temperature
The beginning of May signals a minor rise in the average high-temperature, moving from 13.7°C (56.7°F) in April to a still refreshing 17°C (62.6°F). Nightly temperatures drop to an average low of 9°C (48.2°F) in May.Humidity
The months with the lowest humidity are March through May, with an average relative humidity of 79%.Rainfall
In May, in St-Malo, the rain falls for 10.3 days. Throughout May, 64mm (2.52") of precipitation is accumulated. In St-Malo, during the entire year, the rain falls for 129.4 days and collects up to 759mm (29.88") of precipitation.Snowfall
In St-Malo, snow does not fall in May through October.Sea temperature
In St-Malo, in May, the average water temperature is 12.6°C (54.7°F).Note: Entering waters of 12.6°C (54.7°F) is life-endangering. A mere moment in 13°C (55.4°F) waters feels piercing cold, and below 10°C (50°F) it can lead to immediate cold shock and cessation of breathing control, depending on body resilience.
Daylight
The average length of the day in May is 15h and 16min.On the first day of the month, sunrise is at 06:47 and sunset at 21:23. On the last day of May, in St-Malo, sunrise is at 06:10 and sunset at 22:01 CEST.
Sunshine
In St-Malo, the average sunshine in May is 6.1h.UV index
In May, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 6 during May leads to these advisories:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
What is the average May temperature in St-Malo?
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When it does not snow in St-Malo?
Does it snow in St-Malo in May?
What is the water temperature in May in St-Malo?
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When are sunrise and sunset in May in St-Malo?
How long on average sun shines in May in St-Malo?
What is the UV index reading in May in St-Malo?
Average temperature in May
St-Malo, France
- Average high temperature in May: 17°C
The warmest month (with the highest average high temperature) is August (22°C).
The month with the lowest average high temperature is January (8.8°C).
- Average low temperature in May: 9°C
The month with the highest average low temperature is August (13.6°C).
The coldest month (with the lowest average low temperature) is February (3.1°C).
Average humidity in May
St-Malo, France
- Average humidity in May: 79%
The months with the highest relative humidity are October and December (85%).
The months with the lowest relative humidity are March, April and May (79%).
Average rainfall in May
St-Malo, France
- Average rainfall in May: 63.6mm
The wettest months (with the highest rainfall) are October and November (86.8mm).
The driest month (with the least rainfall) is June (49.1mm).
Average rainfall days in May
St-Malo, France
- Average rainfall days in May: 10.3 days
The month with the highest number of rainy days is November (13.8 days).
The month with the least rainy days is July (7.6 days).
Average snowfall days in May
St-Malo, France
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in May
St-Malo, France
- Average sea temperature in May: 12.6°C
The best month for swimming (with the highest average sea temperature) is September (18.2°C).
The coldest month (with the lowest average sea temperature) is February (8.7°C).
Average daylight in May /
Average sunshine in May
St-Malo, France
- Average daylight in May: 15h and 2min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in May: 6h and 1min
The month with the most sunshine is June (Average sunshine: 6h and 54min).
The month with the least sunshine is December (Average sunshine: 2h and 6min).
Average UV index in May
St-Malo, France
- Average UV index in May: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, November and December (UV index 1).
St-Malo, France
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