September weather forecastFréthun, France
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Fréthun, France, with an average temperature fluctuating between 17.9°C (64.2°F) and 14.5°C (58.1°F).Temperature
September's onset records an average high-temperature of a still refreshing 17.9°C (64.2°F), a near match to August's 19.7°C (67.5°F). Fréthun, during September nights, experiences a subtle shift to a low average of 14.5°C (58.1°F) from the day's heat.Humidity
September is the least humid month in Fréthun, with an average relative humidity of 78%.Rainfall
In Fréthun, in September, during 13.8 rainfall days, 34mm (1.34") of precipitation is typically accumulated. In Fréthun, during the entire year, the rain falls for 178.1 days and collects up to 461mm (18.15") of precipitation.Snowfall
April through October are months without snowfall in Fréthun.Daylight
In Fréthun, the average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 07:07 and sunset at 20:37. On the last day of September, sunrise is at 07:52 and sunset at 19:32 CEST.
Sunshine
The average sunshine in September in Fréthun, France, is 7.3h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 4 in September translates into this advice:
Prioritize safety - Recommendations to avert sunburn are shared. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fréthun, France
- Average high temperature in September: 17.9°C
The warmest month (with the highest average high temperature) is August (19.7°C).
The month with the lowest average high temperature is February (7.1°C).
- Average low temperature in September: 14.5°C
The month with the highest average low temperature is August (15.9°C).
The coldest months (with the lowest average low temperature) are January and February (4.5°C).
Average pressure in September
Fréthun, France
- Average pressure in September: 1017.4mbar
The month with the highest atmospheric pressure is September (1017.4mbar).
The month with the lowest atmospheric pressure is November (1011.5mbar).
Average wind speed in September
Fréthun, France
- Average wind speed in September: 20.8km/h
The windiest month (with the highest average wind speed) is December (28.2km/h).
The calmest month (with the lowest average wind speed) is July (19km/h).
Average humidity in September
Fréthun, France
- Average humidity in September: 78%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is September (78%).
Average rainfall in September
Fréthun, France
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is October (55mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in September
Fréthun, France
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is November (19.5 days).
The month with the least rainy days is April (12.2 days).
Average snowfall in September
Fréthun, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (19mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Fréthun, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (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
Fréthun, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in September: 7h and 18min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is November (Average sunshine: 4h and 6min).
Average sunshine days in September
Fréthun, France
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is April (15.7 days).
The month with the least sunshine days is November (8.8 days).
Average UV index in September
Fréthun, France
- Average UV index in September: 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 and February (UV index 2).
Average cloud cover in September
Fréthun, France
- Average cloud cover in September: 40
The months with the most cloud cover are November and December (Cloud cover 59).
The months with the least cloud cover are April and August (Cloud cover 39).
Average visibility in September
Fréthun, France
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
