September weather forecastSudbury, Canada
September
Weather in September
September in Sudbury witnesses the onset of the fall season with notable changes in climatic conditions. Weather conditions shift as the temperature drops to 18.7°C (65.7°F), marking the transition from summer's warmth to autumn's coolness. The leaves begin their color transition from green to a vibrant array of oranges, reds, and yellows. Sweatshirts and light jackets start to come out of Sudbury’s closets returning to daily wear. Along with the change of weather comes the beginning of the school year, bringing in a renewed lively atmosphere to the city.Temperature
Sudbury's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's warm 23.1°C (73.6°F) to a comfortable 18.7°C (65.7°F). Sudbury records an average nighttime low-temperature of 8.4°C (47.1°F) throughout September.Humidity
In Sudbury, the average relative humidity in September is 79%.Rainfall
In September, the rain falls for 11.1 days. Throughout September, 40mm (1.57") of precipitation is accumulated. Throughout the year, there are 108.1 rainfall days, and 474mm (18.66") of precipitation is accumulated.Snowfall
In Sudbury, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:44 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:05 pm EDT.
Sunshine
The average sunshine in September is 8h.UV index
In September, the average daily maximum UV index in Sudbury is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high daily UV index of 3 during September translates into the following directions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sudbury, Canada
- Average high temperature in September: 18.7°C
The warmest month (with the highest average high temperature) is July (24.5°C).
The month with the lowest average high temperature is January (-8°C).
- Average low temperature in September: 8.4°C
The month with the highest average low temperature is July (12.7°C).
The coldest month (with the lowest average low temperature) is January (-15.9°C).
Average pressure in September
Sudbury, Canada
- Average pressure in September: 1016.6mbar
The month with the highest atmospheric pressure is March (1018.8mbar).
The month with the lowest atmospheric pressure is June (1012.8mbar).
Average wind speed in September
Sudbury, Canada
- Average wind speed in September: 10.4km/h
The windiest month (with the highest average wind speed) is February (12.6km/h).
The calmest months (with the lowest average wind speed) are June and August (10.1km/h).
Average humidity in September
Sudbury, Canada
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is May (68%).
Average rainfall in September
Sudbury, Canada
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is October (65mm).
The driest months (with the least rainfall) are February and December (27mm).
Average rainfall days in September
Sudbury, Canada
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is October (13.7 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in September
Sudbury, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is January (179mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Sudbury, Canada
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sudbury, Canada
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are January and February (Average sunshine: 2h and 0min).
Average sunshine days in September
Sudbury, Canada
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is September (17.5 days).
The month with the least sunshine days is February (12.7 days).
Average UV index in September
Sudbury, 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, February, March, November and December (UV index 1).
Average cloud cover in September
Sudbury, Canada
- Average cloud cover in September: 43
The month with the most cloud cover is January (Cloud cover 79).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in September
Sudbury, Canada
- Average visibility in September: 8km
The months with the highest visibility are May, June and July (9km).
The month with the lowest visibility is January (6km).
