September weather forecastRetonfey, France
September weather for Retonfey, France: In Retonfey, France, in September, during 10.9 rainfall days, 39mm (1.54") of precipitation is typically accumulated. September, the first month of the autumn in Retonfey, is still a comfortable month, with an average temperature varying between 9.9°C (49.8°F) and 19.5°C (67.1°F).
September
Weather in September
September, the first month of the autumn in Retonfey, is still a comfortable month, with an average temperature varying between 9.9°C (49.8°F) and 19.5°C (67.1°F).Temperature
In Retonfey, entering September brings a subtle temperature decrement, reducing from August's warm 23.8°C (74.8°F) to an enjoyable 19.5°C (67.1°F). In Retonfey, the nighttime temperature averages to a frosty 9.9°C (49.8°F) during September.Humidity
The average relative humidity in September in Retonfey, France, is 78%.Rainfall
In Retonfey, in September, during 10.9 rainfall days, 39mm (1.54") of precipitation is typically accumulated. Throughout the year, in Retonfey, France, there are 171.2 rainfall days, and 558mm (21.97") of precipitation is accumulated.Snowfall
April through September are months without snowfall.Daylight
The average length of the day in September is 12h and 35min.On the first day of September in Retonfey, sunrise is at 06:51 and sunset at 20:17. On the last day of the month, sunrise is at 07:33 and sunset at 19:15 CEST.
Sunshine
In September, the average sunshine in Retonfey is 8.2h.UV index
The average daily maximum UV index in September in Retonfey is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 3 suggests these recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Retonfey, France
- Average high temperature in September: 19.5°C
The warmest month (with the highest average high temperature) is August (23.8°C).
The month with the lowest average high temperature is January (3.7°C).
- Average low temperature in September: 9.9°C
The month with the highest average low temperature is August (13.5°C).
The coldest month (with the lowest average low temperature) is January (-0.4°C).
Average pressure in September
Retonfey, France
- Average pressure in September: 1018.1mbar
The month with the highest atmospheric pressure is December (1019mbar).
The month with the lowest atmospheric pressure is November (1014.5mbar).
Average wind speed in September
Retonfey, France
- Average wind speed in September: 10.1km/h
The windiest month (with the highest average wind speed) is February (15.7km/h).
The calmest month (with the lowest average wind speed) is August (9.7km/h).
Average humidity in September
Retonfey, France
- Average humidity in September: 78%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Retonfey, France
- Average rainfall in September: 39mm
The wettest month (with the highest rainfall) is December (66mm).
The driest month (with the least rainfall) is April (33mm).
Average rainfall days in September
Retonfey, France
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is September (10.9 days).
Average snowfall in September
Retonfey, France
- Average snowfall in September: 0mm
The month with the highest snowfall is December (61mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Retonfey, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Retonfey, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 8h and 12min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 18min).
Average sunshine days in September
Retonfey, France
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is October (16.2 days).
The month with the least sunshine days is December (9.7 days).
Average UV index in September
Retonfey, France
- Average UV index in September: 3
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 September
Retonfey, France
- Average cloud cover in September: 38
The month with the most cloud cover is December (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Retonfey, France
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, June, July, August and September (9km).
The months with the lowest visibility are January, May, October, November and December (8km).
