September weather forecastChâteauguay, Canada
September
Weather in September
September, the first month of the autumn in Châteauguay, is still a pleasant month, with an average temperature varying between 20.6°C (69.1°F) and 11.3°C (52.3°F).Temperature
The arrival of September corresponds with a light shift in temperature, down from a warm 24.4°C (75.9°F) in August to a pleasant 20.6°C (69.1°F). In September, the average low-temperature is a fresh 11.3°C (52.3°F).Humidity
In Châteauguay, Canada, the average relative humidity in September is 77%.Rainfall
February and September are months with the least rain when the rain falls for 12.2 days and typically aggregates up to 51mm (2.01") of rain.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Châteauguay is 12h and 31min.On the first day of September in Châteauguay, sunrise is at 6:17 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:36 pm EDT.
Sunshine
In Châteauguay, the average sunshine in September is 8.8h.UV index
In Châteauguay, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In September, an average UV index of 3 transforms into the following instructions:
Exercise prevention - Warding off sunburn is urged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Châteauguay, Canada
- Average high temperature in September: 20.6°C
The warmest month (with the highest average high temperature) is July (25.3°C).
The month with the lowest average high temperature is January (-5.6°C).
- Average low temperature in September: 11.3°C
The month with the highest average low temperature is July (15.9°C).
The coldest month (with the lowest average low temperature) is January (-12.7°C).
Average pressure in September
Châteauguay, Canada
- Average pressure in September: 1017.2mbar
The month with the highest atmospheric pressure is November (1017.9mbar).
The month with the lowest atmospheric pressure is June (1012.5mbar).
Average wind speed in September
Châteauguay, Canada
- Average wind speed in September: 10.9km/h
The windiest months (with the highest average wind speed) are February and April (14.5km/h).
The calmest month (with the lowest average wind speed) is July (10.8km/h).
Average humidity in September
Châteauguay, Canada
- Average humidity in September: 77%
The months with the highest relative humidity are January and February (90%).
The months with the lowest relative humidity are April and May (75%).
Average rainfall in September
Châteauguay, Canada
- Average rainfall in September: 51mm
The wettest month (with the highest rainfall) is May (77mm).
The driest months (with the least rainfall) are February and September (51mm).
Average rainfall days in September
Châteauguay, Canada
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in September
Châteauguay, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is February (219mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Châteauguay, Canada
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Châteauguay, Canada
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 0min).
Average sunshine days in September
Châteauguay, Canada
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in September
Châteauguay, Canada
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Châteauguay, Canada
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Châteauguay, Canada
- Average visibility in September: 9km
The months with the highest visibility are April, May, June, July, August, September, October and November (9km).
The month with the lowest visibility is January (7km).
