September weather forecastWindsor, Canada

September

Weather in September

September signals the advent of autumn in Windsor. Temperatures gradually drop from the heat of August, and early signs of fall are noticeable. Rainfall decreases, and cloud cover begins to form, giving the sky a majestic look. Though the warmth of the sun continues to grace the city, an occasional gust can be felt. With the sea's cooling and leaves starting to change color, it is a month of transition that bodes well for the colder months to come.

Temperature

The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's warm 25.8°C (78.4°F) to a pleasant 22.4°C (72.3°F). During September, Windsor consistently records a temperature low averaging a refreshing 14.6°C (58.3°F).

Humidity

The average relative humidity in September in Windsor is 74%.

Rainfall

In Windsor, during September, the rain falls for 13.1 days and regularly aggregates up to 44mm (1.73") of precipitation. Throughout the year, there are 152.1 rainfall days, and 595mm (23.43") of precipitation is accumulated.

Snowfall

In Windsor, snow does not fall in June through September.

Sea temperature

In Windsor, Canada, the average seawater temperature in September is 21.4°C (70.5°F).
Note: In water with a temperature of 21.4°C (70.5°F), swimming is not a joy for most people. The challenge of controlling breathing increases as the temperature dips from 21°C (69.8°F) to 15°C (59°F).

Daylight

The average length of the day in September in Windsor is 12h and 28min.
On the first day of the month, sunrise is at 6:58 am and sunset at 8:05 pm. On the last day of September, in Windsor, sunrise is at 7:28 am and sunset at 7:14 pm EDT.

Sunshine

In September, the average sunshine is 8.3h.

UV index

In Windsor, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 4 during September leads to these instructions:
Adopt protective measures - It is advised to guard against sun damage. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.

Updated: Feb 5, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in September, in Windsor, records 22.4°C (72.3°F), while the low-temperature is 14.6°C (58.3°F).

The average relative humidity in September in Windsor is 74%.

In Windsor, Canada, in September, it is raining for 13.1 days, with typically 44mm (1.73") of accumulated precipitation.

In Windsor, Canada, snow does not fall in June through September.

In Windsor, Canada, in September, it doesn't snow. In October, it regularly snows.

In Windsor, Canada, the average seawater temperature in September is 21.4°C (70.5°F). For swimming, a surface water temperature of 21.4°C (70.5°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

In September, the average day length is 12h and 28min.

In September, on the first day of the month, sunrise is at 6:58 am and sunset at 8:05 pm. On the last day of the month, in Windsor, Canada, sunrise is at 7:28 am and sunset at 7:14 pm EDT.

In Windsor, the average sunshine duration in September is 8.3h.

In September, the average daily maximum UV index in Windsor is 4. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

25.8°C

22.4°C

14.9°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

12.2km/h

13.2km/h

17km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

0.2

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

13.6

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Windsor, Canada

Average high temperature in September: 22.4°C

The warmest month (with the highest average high temperature) is July (26.6°C).
The month with the lowest average high temperature is January (-1.5°C).

Average low temperature in September: 14.6°C

The month with the highest average low temperature is July (18.8°C).
The coldest month (with the lowest average low temperature) is January (-6.9°C).

Average pressure in September
Windsor, Canada

Average pressure in September: 1017.2mbar

The month with the highest atmospheric pressure is November (1019.2mbar).
The month with the lowest atmospheric pressure is June (1013.5mbar).

Average wind speed in September
Windsor, Canada

Average wind speed in September: 12.8km/h

The windiest month (with the highest average wind speed) is January (16.9km/h).
The calmest month (with the lowest average wind speed) is July (10.9km/h).

Average humidity in September
Windsor, Canada

Average humidity in September: 74%

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are July and August (73%).

Average rainfall in September
Windsor, Canada

Average rainfall in September: 44mm

The wettest month (with the highest rainfall) is May (73mm).
The driest month (with the least rainfall) is February (31mm).

Average rainfall days in September
Windsor, Canada

Average rainfall days in September: 13.1 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (7.1 days).

Average snowfall in September
Windsor, Canada

Average snowfall in September: 0mm

The month with the highest snowfall is January (109mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September
Windsor, Canada

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in September
Windsor, Canada

Average sea temperature in September: 21.4°C

The best month for swimming (with the highest average sea temperature) is August (24.1°C).
The coldest month (with the lowest average sea temperature) is February (0.4°C).

Average daylight in September /
Average sunshine in September
Windsor, Canada

Average daylight in September: 12h and 30min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

Average sunshine in September: 8h and 18min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).