Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a warm 24.3°C (75.7°F) in August to an agreeable 20.2°C (68.4°F). Deux-Montagnes, during September nights, observes an average temperature of 10.6°C (51.1°F).Humidity
In Deux-Montagnes, the average relative humidity in September is 78%.Rainfall
The months with the least rainfall in Deux-Montagnes are January and September Rain falls for 8.8 days and accumulates 23mm (0.91") of rain.Snowfall
In Deux-Montagnes, snow does not fall in May through September.Daylight
In Deux-Montagnes, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:32 pm. On the last day of September, in Deux-Montagnes, sunrise is at 6:53 am and sunset at 6:37 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
The average daily maximum UV index in September in Deux-Montagnes is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 3 suggests these recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Deux-Montagnes in September?
What is the average humidity in September in Deux-Montagnes?
What is the driest month in Deux-Montagnes?
How much does it rain in Deux-Montagnes in September?
When it does not snow in Deux-Montagnes?
Does it snow in Deux-Montagnes in September?
What is the average length of the day in September in Deux-Montagnes?
What time are sunrise and sunset in September in Deux-Montagnes?
How many hours of sunshine does Deux-Montagnes have in September?
What is the UV index reading in September in Deux-Montagnes?
Average temperature in September
Deux-Montagnes, Canada
- Average high temperature in September: 20.2°C
The warmest month (with the highest average high temperature) is July (25.1°C).
The month with the lowest average high temperature is January (-6.1°C).
- Average low temperature in September: 10.6°C
The month with the highest average low temperature is July (15.3°C).
The coldest month (with the lowest average low temperature) is January (-13.4°C).
Average pressure in September
Deux-Montagnes, Canada
- Average pressure in September: 1017.1mbar
The month with the highest atmospheric pressure is November (1017.8mbar).
The month with the lowest atmospheric pressure is June (1012.4mbar).
Average wind speed in September
Deux-Montagnes, Canada
- Average wind speed in September: 10.9km/h
The windiest month (with the highest average wind speed) is April (14.5km/h).
The calmest months (with the lowest average wind speed) are July and August (10.7km/h).
Average humidity in September
Deux-Montagnes, Canada
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
Deux-Montagnes, Canada
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is October (37mm).
The driest months (with the least rainfall) are January and September (23mm).
Average rainfall days in September
Deux-Montagnes, Canada
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is July (13.8 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in September
Deux-Montagnes, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is February (84mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Deux-Montagnes, Canada
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Deux-Montagnes, Canada
- Average daylight in September: 12h and 3min
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 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 0min).
Average sunshine days in September
Deux-Montagnes, Canada
- Average sunshine days in September: 19.2 days
The month with the most sunshine days is September (19.2 days).
The month with the least sunshine days is June (13.9 days).
Average UV index in September
Deux-Montagnes, Canada
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Deux-Montagnes, Canada
- Average cloud cover in September: 36
The month with the most cloud cover is February (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Deux-Montagnes, 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, February, March and December (8km).
