September weather forecastSaint-Hellier, France
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Saint-Hellier, France, with an average temperature fluctuating between 17.9°C (64.2°F) and 13.9°C (57°F).Temperature
September's onset sees an average high-temperature of a still refreshing 17.9°C (64.2°F), exhibiting a slight fluctuation from the previous month. Saint-Hellier observes a consistent average low-temperature of 13.9°C (57°F) throughout September nights.Humidity
September is the least humid month, with an average relative humidity of 79%.Rainfall
In Saint-Hellier, during September, the rain falls for 13.3 days and regularly aggregates up to 27mm (1.06") of precipitation. Throughout the year, there are 177.4 rainfall days, and 428mm (16.85") of precipitation is accumulated.Snowfall
In Saint-Hellier, snow does not fall in April through October.Daylight
In Saint-Hellier, the average length of the day in September is 12h and 36min.On the first day of the month, sunrise is at 07:11 and sunset at 20:38. On the last day of September, in Saint-Hellier, France, sunrise is at 07:54 and sunset at 19:35 CEST.
Sunshine
In September, the average sunshine is 7.4h.UV index
In September, the average daily maximum UV index in Saint-Hellier is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Act with care - Obligation to protect against skin and eye damage is highlighted. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint-Hellier, France
- Average high temperature in September: 17.9°C
The warmest month (with the highest average high temperature) is August (19.5°C).
The months with the lowest average high temperature are January and February (7.3°C).
- Average low temperature in September: 13.9°C
The month with the highest average low temperature is August (15.4°C).
The coldest month (with the lowest average low temperature) is February (4.2°C).
Average pressure in September
Saint-Hellier, France
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is September (1017.8mbar).
The month with the lowest atmospheric pressure is November (1012.1mbar).
Average wind speed in September
Saint-Hellier, France
- Average wind speed in September: 19.2km/h
The windiest month (with the highest average wind speed) is December (27.5km/h).
The calmest month (with the lowest average wind speed) is July (17.3km/h).
Average humidity in September
Saint-Hellier, France
- Average humidity in September: 79%
The month with the highest relative humidity is June (84%).
The month with the lowest relative humidity is September (79%).
Average rainfall in September
Saint-Hellier, France
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is December (51mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in September
Saint-Hellier, France
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is October (16.7 days).
The month with the least rainy days is April (12.4 days).
Average snowfall in September
Saint-Hellier, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (11mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Saint-Hellier, France
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.9 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
Saint-Hellier, 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 12min).
- Average sunshine in September: 7h and 24min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The months with the least sunshine are January and November (Average sunshine: 4h and 0min).
Average sunshine days in September
Saint-Hellier, France
- Average sunshine days in September: 13.6 days
The month with the most sunshine days is April (14.6 days).
The month with the least sunshine days is November (10.4 days).
Average UV index in September
Saint-Hellier, 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, February, November and December (UV index 2).
Average cloud cover in September
Saint-Hellier, France
- Average cloud cover in September: 40
The months with the most cloud cover are November and December (Cloud cover 60).
The months with the least cloud cover are April, July and August (Cloud cover 39).
Average visibility in September
Saint-Hellier, 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).
