September weather forecastSaint Aubin, Jersey
September
Weather in September
In September, Saint Aubin, Jersey witnesses a transition sweeping into autumn, with a subsequent decrease in temperatures relative to August. With shorter daylight hours, the imminent arrival of fall is apparent throughout the month. Moving towards October, autumnal characteristics become firmly entrenched. September features regular rainfall days along with increased wind speeds compared to August.Temperature
In the transition from August to September, Saint Aubin reports an average high-temperature of a still refreshing 17.4°C (63.3°F), indicating a close resemblance to the prior month. September introduces a small decrease to a nighttime average of 15.6°C (60.1°F) in Saint Aubin, Jersey.Humidity
In Saint Aubin, the average relative humidity in September is 79%.Rainfall
In Saint Aubin, in September, it is raining for 13.4 days, with typically 29mm (1.14") of accumulated precipitation. In Saint Aubin, during the entire year, the rain falls for 191.6 days and collects up to 531mm (20.91") of precipitation.Snowfall
In Saint Aubin, snow does not fall in February, April through October and December.Daylight
In Saint Aubin, the average length of the day in September is 12h and 35min.On the first day of the month, sunrise is at 06:25 and sunset at 19:51. On the last day of September, sunrise is at 07:07 and sunset at 18:49 BST.
Sunshine
The average sunshine in September is 8.6h.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 unsafe exposure to UV radiation for average individuals.Note: In September, the UV index of 4 transforms into the following advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint Aubin, Jersey
- Average high temperature in September: 17.4°C
The warmest month (with the highest average high temperature) is August (18.1°C).
The month with the lowest average high temperature is February (9°C).
- Average low temperature in September: 15.6°C
The month with the highest average low temperature is August (16.3°C).
The coldest month (with the lowest average low temperature) is February (6.9°C).
Average pressure in September
Saint Aubin, Jersey
- Average pressure in September: 1018mbar
The month with the highest atmospheric pressure is September (1018mbar).
The month with the lowest atmospheric pressure is November (1011.8mbar).
Average wind speed in September
Saint Aubin, Jersey
- Average wind speed in September: 23.9km/h
The windiest month (with the highest average wind speed) is December (34.3km/h).
The calmest month (with the lowest average wind speed) is July (20.6km/h).
Average humidity in September
Saint Aubin, Jersey
- Average humidity in September: 79%
The month with the highest relative humidity is June (84%).
The months with the lowest relative humidity are February, November and December (78%).
Average rainfall in September
Saint Aubin, Jersey
- Average rainfall in September: 29mm
The wettest month (with the highest rainfall) is November (74mm).
The driest months (with the least rainfall) are May and July (27mm).
Average rainfall days in September
Saint Aubin, Jersey
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is November (20.7 days).
The month with the least rainy days is May (12.7 days).
Average snowfall in September
Saint Aubin, Jersey
- Average snowfall in September: 0mm
The months with the highest snowfall are January, March and November (1mm).
The months with the least snowfall are February, April, May, June, July, August, September, October and December (0mm).
Average snowfall days in September
Saint Aubin, Jersey
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are February and March (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Saint Aubin, Jersey
- 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 36min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Saint Aubin, Jersey
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is May (15.3 days).
The month with the least sunshine days is November (6.5 days).
Average UV index in September
Saint Aubin, Jersey
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is February (UV index 2).
Average cloud cover in September
Saint Aubin, Jersey
- Average cloud cover in September: 39
The months with the most cloud cover are January, November and December (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in September
Saint Aubin, Jersey
- 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).
