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
The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a moderately hot 24.9°C (76.8°F) in August to an agreeable 21.5°C (70.7°F). Throughout the month of September, Dundas witnesses an average temperature of 12.9°C (55.2°F).Humidity
The average relative humidity in September in Dundas, Canada, is 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.3 days and typically collects 42mm (1.65") of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Dundas is 12h and 29min.On the first day of September, sunrise is at 6:44 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:02 pm EDT.
Sunshine
In September, the average sunshine in Dundas, Canada, is 9h.UV index
The average daily maximum UV index in September in Dundas is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Dundas in September?
What is the average humidity in September in Dundas?
What is the driest month in Dundas?
How much does it rain in Dundas in September?
When it does not snow in Dundas?
Does it snow in Dundas in September?
What is the average length of the day in September in Dundas?
What time are sunrise and sunset in September in Dundas?
How long on average sun shines in September in Dundas?
What is the UV index reading in September in Dundas?
Average temperature in September
Dundas, Canada
- Average high temperature in September: 21.5°C
The warmest month (with the highest average high temperature) is July (25.7°C).
The month with the lowest average high temperature is January (-2.4°C).
- Average low temperature in September: 12.9°C
The month with the highest average low temperature is July (16.8°C).
The coldest month (with the lowest average low temperature) is January (-7.7°C).
Average pressure in September
Dundas, Canada
- Average pressure in September: 1017.1mbar
The months with the highest atmospheric pressure are March and November (1018.5mbar).
The month with the lowest atmospheric pressure is June (1013.3mbar).
Average wind speed in September
Dundas, Canada
- Average wind speed in September: 12.2km/h
The windiest month (with the highest average wind speed) is January (18.7km/h).
The calmest month (with the lowest average wind speed) is July (11.1km/h).
Average humidity in September
Dundas, Canada
- Average humidity in September: 77%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Dundas, Canada
- Average rainfall in September: 42mm
The wettest month (with the highest rainfall) is April (77mm).
The driest month (with the least rainfall) is September (42mm).
Average rainfall days in September
Dundas, Canada
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is February (7.2 days).
Average snowfall in September
Dundas, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is February (176mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Dundas, Canada
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dundas, Canada
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Dundas, Canada
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is September (14.8 days).
The month with the least sunshine days is February (9.2 days).
Average UV index in September
Dundas, Canada
- Average UV index in September: 4
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
Dundas, Canada
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Dundas, Canada
- Average visibility in September: 9km
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January and February (8km).
