September weather forecastOakville, Canada
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Oakville, Canada, with an average temperature fluctuating between 14.5°C (58.1°F) and 21.1°C (70°F).Temperature
A minor decrease in the average high-temperature is observed during September, shifting from a moderately hot 24.8°C (76.6°F) in August to an agreeable 21.1°C (70°F). The average low-temperature during September nights is a mild 14.5°C (58.1°F).Humidity
The months with the lowest humidity in Oakville are April, July through September, with an average relative humidity of 75%.Rainfall
September is the month with the least rainfall in Oakville. Rain falls for 7.7 days and accumulates 8mm (0.31") of precipitation.Snowfall
In Oakville, Canada, snow does not fall in June through October.Sea temperature
In September, the average sea temperature in Oakville is 21.1°C (70°F).Note: For the majority of people, swimming in water at 21.1°C (70°F) is not enjoyable. The challenge of controlling breathing escalates as the temperature decreases from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:43 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:15 am and sunset at 7:01 pm EDT.
Sunshine
In September, the average sunshine in Oakville is 9.3h.UV index
The average daily maximum UV index in September in Oakville is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Heed this! UV intensity is much stronger when reflected off sand and water.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Oakville, Canada
- Average high temperature in September: 21.1°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 (-2.2°C).
- Average low temperature in September: 14.5°C
The month with the highest average low temperature is July (18.2°C).
The coldest month (with the lowest average low temperature) is January (-6.9°C).
Average pressure in September
Oakville, Canada
- Average pressure in September: 1017mbar
The month with the highest atmospheric pressure is March (1018.4mbar).
The month with the lowest atmospheric pressure is June (1013.2mbar).
Average wind speed in September
Oakville, Canada
- Average wind speed in September: 13.6km/h
The windiest month (with the highest average wind speed) is January (19.6km/h).
The calmest month (with the lowest average wind speed) is July (11.7km/h).
Average humidity in September
Oakville, Canada
- Average humidity in September: 75%
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are April, July, August and September (75%).
Average rainfall in September
Oakville, Canada
- Average rainfall in September: 8mm
The wettest month (with the highest rainfall) is July (18mm).
The driest month (with the least rainfall) is September (8mm).
Average rainfall days in September
Oakville, Canada
- Average rainfall days in September: 7.7 days
The month with the highest number of rainy days is July (11.4 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in September
Oakville, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is February (36mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Oakville, Canada
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Oakville, Canada
- Average sea temperature in September: 21.1°C
The best month for swimming (with the highest average sea temperature) is August (23.4°C).
The coldest month (with the lowest average sea temperature) is February (1.2°C).
Average daylight in September /
Average sunshine in September
Oakville, Canada
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
Oakville, Canada
- Average sunshine days in September: 20.5 days
The month with the most sunshine days is September (20.5 days).
The month with the least sunshine days is July (14.1 days).
Average UV index in September
Oakville, Canada
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Oakville, Canada
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Oakville, Canada
- Average visibility in September: 10km
The months with the highest visibility are June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, May, November and December (9km).
