August weather forecastRennes, France
August
Weather in August
August is the continuation of the peak summer season, displaying consistency in temperatures with a peak at 23.1°C (73.6°F) and a minimum around 12.6°C (54.7°F). Despite a slight decrease in daylight duration from July to 14.3 hours, summer continues to dominate. However, minor increases in rainfall occur, with a total accumulation of 25mm (0.98") throughout the month. True to its nature, August offers a perfect balance between the sultry warmth, extended sunshine periods, and marginal cooling effects from rainfall.Temperature
August, with its high-temperature average of 23.1°C (73.6°F) and a low-temperature average of 12.6°C (54.7°F), is the warmest month.Humidity
The months with the lowest humidity are July through September, with an average relative humidity of 78%.Rainfall
In August, the rain falls for 11.5 days. Throughout August, 25mm (0.98") of precipitation is accumulated. In Rennes, during the entire year, the rain falls for 150.1 days and collects up to 330mm (12.99") of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Rennes, the average length of the day in August is 14h and 16min.On the first day of the month, sunrise is at 06:43 and sunset at 21:42. On the last day of August, sunrise is at 07:23 and sunset at 20:49 CEST.
Sunshine
In August, the average sunshine in Rennes is 8.1h.UV index
June through August, with an average maximum UV index of 5, are months with the highest UV index in Rennes. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: A maximum high daily UV index of 5 during August translates into the following directions:
Put precautions into practice - Protective measures against sun-induced damage are advised. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Rennes, France
- Average high temperature in August: 23.1°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 August: 12.6°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 August
Rennes, France
- Average pressure in August: 1017.1mbar
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 August
Rennes, France
- Average wind speed in August: 11.7km/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 August
Rennes, France
- Average humidity in August: 78%
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 August
Rennes, France
- Average rainfall in August: 25mm
The wettest month (with the highest rainfall) is June (39mm).
The driest month (with the least rainfall) is September (12mm).
Average rainfall days in August
Rennes, France
- Average rainfall days in August: 11.5 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 August
Rennes, France
- Average snowfall in August: 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 August
Rennes, France
- Average snowfall days in August: 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 August /
Average sunshine in August
Rennes, France
- Average daylight in August: 14h and 18min
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 August: 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 August
Rennes, France
- Average sunshine days in August: 15.5 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 August
Rennes, France
- Average UV index in August: 5
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 August
Rennes, France
- Average cloud cover in August: 44
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 August
Rennes, France
- Average visibility in August: 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).
