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
Weather in September
Temperature
The shift from August to September includes a small decrease in the average high-temperature, from a warm 24.7°C (76.5°F) to an agreeable 20.7°C (69.3°F). Mont Saint-Hilaire cools down to an average low-temperature of 11.4°C (52.5°F) throughout the month of September.Humidity
In Mont Saint-Hilaire, Canada, the average relative humidity in September is 76%.Rainfall
September is the month with the least rainfall. Rain falls for 12.5 days and accumulates 56mm (2.2") of precipitation.Snowfall
In Mont Saint-Hilaire, snow does not fall in June through September.Daylight
The average length of the day in September in Mont Saint-Hilaire is 12h and 31min.On the first day of September, sunrise is at 6:14 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:34 pm EDT.
Sunshine
The average sunshine in September in Mont Saint-Hilaire is 8.4h.UV index
In Mont Saint-Hilaire, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: In September, a daily UV index of 3 turns into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Frequently asked questions
What are the temperatures in Mont Saint-Hilaire in September?
What is the average humidity in September in Mont Saint-Hilaire?
What is the driest month in Mont Saint-Hilaire?
How many days does it rain in September in Mont Saint-Hilaire?
When it does not snow in Mont Saint-Hilaire?
Does it snow in Mont Saint-Hilaire in September?
What is the average length of the day in September in Mont Saint-Hilaire?
What time are sunrise and sunset in September in Mont Saint-Hilaire?
How long on average sun shines in September in Mont Saint-Hilaire?
What is the UV index reading in September in Mont Saint-Hilaire?
Average temperature in September
Mont Saint-Hilaire, Canada
- Average high temperature in September: 20.7°C
The warmest month (with the highest average high temperature) is July (25.8°C).
The month with the lowest average high temperature is January (-5.8°C).
- Average low temperature in September: 11.4°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 (-13°C).
Average pressure in September
Mont Saint-Hilaire, 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
Mont Saint-Hilaire, Canada
- Average wind speed in September: 11km/h
The windiest months (with the highest average wind speed) are February and April (14.2km/h).
The calmest month (with the lowest average wind speed) is August (10.8km/h).
Average humidity in September
Mont Saint-Hilaire, Canada
- Average humidity in September: 76%
The months with the highest relative humidity are January and February (90%).
The months with the lowest relative humidity are April and May (74%).
Average rainfall in September
Mont Saint-Hilaire, Canada
- Average rainfall in September: 56mm
The wettest month (with the highest rainfall) is May (86mm).
The driest month (with the least rainfall) is September (56mm).
Average rainfall days in September
Mont Saint-Hilaire, Canada
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in September
Mont Saint-Hilaire, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is January (295mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Mont Saint-Hilaire, 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
Mont Saint-Hilaire, 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 2min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 2h and 42min).
Average sunshine days in September
Mont Saint-Hilaire, Canada
- Average sunshine days in September: 16 days
The month with the most sunshine days is September (16 days).
The month with the least sunshine days is February (8.7 days).
Average UV index in September
Mont Saint-Hilaire, 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, February and December (UV index 1).
Average cloud cover in September
Mont Saint-Hilaire, Canada
- Average cloud cover in September: 38
The month with the most cloud cover is February (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in September
Mont Saint-Hilaire, 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).
Mont Saint-Hilaire, Canada
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