September weather forecastL'Assomption, Canada
September
Weather in September
The first month of the autumn, September, is also an agreeable month in L'Assomption, Canada, with an average temperature fluctuating between 20.3°C (68.5°F) and 11°C (51.8°F).Temperature
L'Assomption's progression into September involves a minor drop in the average high-temperature, slightly receding from a moderately hot 24.6°C (76.3°F) in August to an agreeable 20.3°C (68.5°F). L'Assomption records an average nighttime low-temperature of 11°C (51.8°F) throughout September.Humidity
The average relative humidity in September in L'Assomption is 77%.Rainfall
In L'Assomption, Canada, in September, during 12.5 rainfall days, 57mm (2.24") of precipitation is typically accumulated. In L'Assomption, during the entire year, the rain falls for 158.3 days and collects up to 801mm (31.54") of precipitation.Snowfall
June through September are months without snowfall in L'Assomption.Daylight
In L'Assomption, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:15 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:35 pm EDT.
Sunshine
In L'Assomption, the average sunshine in September is 8.5h.UV index
In L'Assomption, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average UV index of 4 in September transforms into this advice:
Take precautions - Protection against sun damage is advised. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
L'Assomption, Canada
- Average high temperature in September: 20.3°C
The warmest month (with the highest average high temperature) is July (25.4°C).
The month with the lowest average high temperature is January (-6.2°C).
- Average low temperature in September: 11°C
The month with the highest average low temperature is July (15.5°C).
The coldest month (with the lowest average low temperature) is January (-13.7°C).
Average pressure in September
L'Assomption, Canada
- Average pressure in September: 1017.1mbar
The month with the highest atmospheric pressure is November (1017.7mbar).
The month with the lowest atmospheric pressure is June (1012.3mbar).
Average wind speed in September
L'Assomption, Canada
- Average wind speed in September: 10.9km/h
The windiest month (with the highest average wind speed) is April (14km/h).
The calmest months (with the lowest average wind speed) are July and August (10.7km/h).
Average humidity in September
L'Assomption, Canada
- Average humidity in September: 77%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is May (73%).
Average rainfall in September
L'Assomption, Canada
- Average rainfall in September: 57mm
The wettest month (with the highest rainfall) is April (83mm).
The driest month (with the least rainfall) is November (46mm).
Average rainfall days in September
L'Assomption, Canada
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is January (6.5 days).
Average snowfall in September
L'Assomption, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is January (278mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
L'Assomption, Canada
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
L'Assomption, Canada
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 30min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).
Average sunshine days in September
L'Assomption, Canada
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is September (15.7 days).
The month with the least sunshine days is February (9.8 days).
Average UV index in September
L'Assomption, Canada
- 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 December (UV index 1).
Average cloud cover in September
L'Assomption, Canada
- Average cloud cover in September: 36
The months with the most cloud cover are January and February (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
L'Assomption, Canada
- Average visibility in September: 9km
The months with the highest visibility are April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January and February (7km).
