May weather forecastRennes, France
May
Weather in May
May establishes the real advent of spring, with significantly improved temperatures and extended daylight hours. The temperatures do not drop below 8°C (46.4°F), and the highs reach a peak around 17.4°C (63.3°F). However, 30mm (1.18") precipitation occurs in May, continuing the trend of increasing rainfall from April. Overall, the month is known for its warming climate, bright daylight, periodic rainfall, and getting ever closer to the summertime.Temperature
In May, Rennes notes an average high-temperature of an enjoyable 17.4°C (63.3°F), hardly different from the preceding month. During the month of May, Rennes anticipates a mean low-temperature of 8°C (46.4°F).Humidity
In May, the average relative humidity in Rennes is 83%.Rainfall
In Rennes, in May, during 15.3 rainfall days, 30mm (1.18") of precipitation is typically accumulated. Throughout the year, there are 150.1 rainfall days, and 330mm (12.99") of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In Rennes, the average length of the day in May is 15h and 12min.On the first day of May in Rennes, sunrise is at 06:47 and sunset at 21:20. On the last day of the month, sunrise is at 06:11 and sunset at 21:57 CEST.
Sunshine
In May, the average sunshine in Rennes is 8.1h.UV index
The average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The average daily UV index of 4 in May transforms into the following instructions:
Take necessary precautions - Suggestions to elude sunburn are provided. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Rennes, France
- Average high temperature in May: 17.4°C
The warmest month (with the highest average high temperature) is August (23.1°C).
The month with the lowest average high temperature is January (8.4°C).
- Average low temperature in May: 8°C
The month with the highest average low temperature is July (12.8°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).
Average pressure in May
Rennes, France
- Average pressure in May: 1017.3mbar
The month with the highest atmospheric pressure is December (1018.4mbar).
The month with the lowest atmospheric pressure is November (1012.9mbar).
Average wind speed in May
Rennes, France
- Average wind speed in May: 13.2km/h
The windiest month (with the highest average wind speed) is February (17.6km/h).
The calmest month (with the lowest average wind speed) is August (11.7km/h).
Average humidity in May
Rennes, France
- Average humidity in May: 83%
The month with the highest relative humidity is December (88%).
The months with the lowest relative humidity are July, August and September (78%).
Average rainfall in May
Rennes, France
- Average rainfall in May: 30mm
The wettest month (with the highest rainfall) is June (39mm).
The driest month (with the least rainfall) is September (12mm).
Average rainfall days in May
Rennes, France
- Average rainfall days in May: 15.3 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is September (8.4 days).
Average snowfall in May
Rennes, France
- Average snowfall in May: 0mm
The months with the highest snowfall are February, March, April and December (2mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in May
Rennes, France
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Rennes, France
- Average daylight in May: 15h and 12min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in May: 8h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in May
Rennes, France
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is September (18.5 days).
The month with the least sunshine days is May (12.1 days).
Average UV index in May
Rennes, France
- Average UV index in May: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Rennes, France
- Average cloud cover in May: 48
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 41).
Average visibility in May
Rennes, France
- Average visibility in May: 8km
The months with the highest visibility are January, February, March, April, June, July, October, November and December (9km).
The months with the lowest visibility are May, August and September (8km).
