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
As August transitions into September, Louiseville sees a gentle drop in the average high-temperature, transitioning from a moderately hot 24.1°C (75.4°F) to a refreshing 19.9°C (67.8°F). September brings Louiseville a consistent average low-temperature of 10.3°C (50.5°F).Humidity
In September, the average relative humidity is 78%.Rainfall
In September, the rain falls for 12.5 days. Throughout September, 54mm (2.13") of precipitation is accumulated. In Louiseville, during the entire year, the rain falls for 147.4 days and collects up to 765mm (30.12") of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Louiseville, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:13 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:33 pm EDT.
Sunshine
In Louiseville, the average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: A daily high UV index of 3 in September leads to these guidelines:
Heed the precautions - Suggestions to avoid sunburn are made. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Louiseville?
What is the average humidity in September in Louiseville?
How many days does it rain in September in Louiseville?
When it does not snow in Louiseville?
Does it snow in Louiseville in September?
What is the average length of the day in September in Louiseville?
When are sunrise and sunset in September in Louiseville?
How many hours of sunshine does Louiseville have in September?
What is the UV index reading in September in Louiseville?
Average temperature in September
Louiseville, Canada
- Average high temperature in September: 19.9°C
The warmest month (with the highest average high temperature) is July (25°C).
The month with the lowest average high temperature is January (-6.3°C).
- Average low temperature in September: 10.3°C
The month with the highest average low temperature is July (14.8°C).
The coldest month (with the lowest average low temperature) is January (-13.9°C).
Average pressure in September
Louiseville, Canada
- Average pressure in September: 1016.9mbar
The months with the highest atmospheric pressure are March and November (1017.5mbar).
The month with the lowest atmospheric pressure is June (1012.2mbar).
Average wind speed in September
Louiseville, Canada
- Average wind speed in September: 10.6km/h
The windiest month (with the highest average wind speed) is April (13.4km/h).
The calmest month (with the lowest average wind speed) is August (10.4km/h).
Average humidity in September
Louiseville, 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 (73%).
Average rainfall in September
Louiseville, Canada
- Average rainfall in September: 54mm
The wettest month (with the highest rainfall) is April (76mm).
The driest month (with the least rainfall) is March (53mm).
Average rainfall days in September
Louiseville, Canada
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in September
Louiseville, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is January (247mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Louiseville, Canada
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Louiseville, Canada
- Average daylight in September: 12h and 3min
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 3min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 2h and 54min).
Average sunshine days in September
Louiseville, Canada
- Average sunshine days in September: 15.9 days
The months with the most sunshine days are September and November (15.9 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in September
Louiseville, 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 and December (UV index 1).
Average cloud cover in September
Louiseville, Canada
- Average cloud cover in September: 36
The month with the most cloud cover is February (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in September
Louiseville, 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).
