September weather forecastYffiniac, France
September
Weather in September
September, the first month of the autumn in Yffiniac, is still a comfortable month, with an average temperature varying between 11.5°C (52.7°F) and 19.2°C (66.6°F).Temperature
As Yffiniac, France, welcomes September, the average high-temperature records at an enjoyable 19.2°C (66.6°F), marking an insignificant deviation from the prior month. Throughout September, an average low-temperature of 11.5°C (52.7°F) is expected in Yffiniac.Humidity
With an average relative humidity of 81%, September is the least humid month in Yffiniac, France.Rainfall
The month with the least rainfall in Yffiniac is September, when the rain falls for 11 days and typically collects 18mm (0.71") of precipitation.Snowfall
May through October are months without snowfall in Yffiniac.Daylight
In September, the average length of the day in Yffiniac, France, is 12h and 35min.On the first day of the month, sunrise is at 07:28 and sunset at 20:52. On the last day of September, in Yffiniac, sunrise is at 08:09 and sunset at 19:51 CEST.
Sunshine
The average sunshine in September in Yffiniac is 7.2h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. Around midday, solar radiation is most harmful; hence, exposure should be limited. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Yffiniac, France
- Average high temperature in September: 19.2°C
The warmest month (with the highest average high temperature) is August (20.6°C).
The month with the lowest average high temperature is January (8.5°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (12.9°C).
The coldest month (with the lowest average low temperature) is February (3.8°C).
Average pressure in September
Yffiniac, France
- Average pressure in September: 1018.3mbar
The month with the highest atmospheric pressure is September (1018.3mbar).
The month with the lowest atmospheric pressure is November (1012.3mbar).
Average wind speed in September
Yffiniac, France
- Average wind speed in September: 14.7km/h
The windiest month (with the highest average wind speed) is February (21.3km/h).
The calmest month (with the lowest average wind speed) is August (13.8km/h).
Average humidity in September
Yffiniac, France
- Average humidity in September: 81%
The months with the highest relative humidity are January, November and December (85%).
The month with the lowest relative humidity is September (81%).
Average rainfall in September
Yffiniac, France
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is November (50mm).
The driest month (with the least rainfall) is September (18mm).
Average rainfall days in September
Yffiniac, France
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is November (17.4 days).
The month with the least rainy days is September (11 days).
Average snowfall in September
Yffiniac, France
- Average snowfall in September: 0mm
The month with the highest snowfall is February (13mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Yffiniac, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Yffiniac, France
- Average daylight in September: 12h and 36min
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 September: 7h and 12min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Yffiniac, France
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is May (15.1 days).
The month with the least sunshine days is November (8.3 days).
Average UV index in September
Yffiniac, France
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Yffiniac, France
- Average cloud cover in September: 42
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 42).
Average visibility in September
Yffiniac, France
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
