September Weather in Windsor, United States

Last updated: June 24, 2025

In Windsor, United States, the average temperature in September hovers around 24°C (75°F), making it a pleasantly warm time of year. Temperatures can range from a cool 11°C (52°F) to a scorching 36°C (97°F), offering variety for any adventurer. However, be prepared for some rain, as the area sees an average precipitation of 119 mm (4.7 in) over about 10 days. With an average humidity of 80%, it’s wise to stay hydrated and enjoy the tropical vibe!

September Temperature in Windsor

In September in Windsor, the average temperature is 24°C (75°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as 11°C (52°F). This makes it a great time for travelers to enjoy warm days while also being prepared for cooler evenings.

September Weather in Windsor: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Windsor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Windsor, September typically has an average temperature of 24°C (75°F), with highs reaching up to 36°C (97°F) and lows dropping to around 11°C (52°F).

Data source: Temperature data for Windsor generated using information from the Copernicus Climate Change Service.

September Precipitation in Windsor

In Windsor in September, the total precipitation amount is 119 mm (4.7 in) over the span of 10 days.

September Precipitation Trends in Windsor

The chart displays monthly precipitation patterns in Windsor, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Windsor, September typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Windsor

In Windsor in September humidity is 80%. With an average temperature of 24°C (75°F), this humidity feels like a warm, sticky blanket enveloping you, making travel slightly uncomfortable as sweat clings to your skin and the air feels thick, urging you to seek shade and hydration frequently.

September Average Humidity in Windsor

This chart illustrates the average monthly humidity levels in Windsor, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Windsor is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Windsor

In Windsor in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Windsor.

Maximum UV Index Levels in Windsor for September

The chart shows the monthly maximum UV Index (UVI) for Windsor in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Windsor typically reaches 9, which falls under the very high exposure category.

Data source: Windsor September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Windsor Compares to Other Months

Weather in Windsor varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Windsor, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Windsor, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	95 mm (3.7 inches)	84%	moderate
February Weather	10°C (49°F)	90 mm (3.5 inches)	81%	high
March Weather	11°C (53°F)	69 mm (2.7 inches)	80%	very high
April Weather	17°C (62°F)	99 mm (3.9 inches)	80%	very high
May Weather	21°C (70°F)	114 mm (4.5 inches)	81%	extreme
June Weather	24°C (76°F)	147 mm (5.8 inches)	82%	extreme
July Weather	27°C (80°F)	137 mm (5.4 inches)	83%	extreme
August Weather	26°C (79°F)	171 mm (6.7 inches)	82%	very high
September Weather	24°C (75°F)	119 mm (4.7 inches)	80%	very high
October Weather	19°C (66°F)	76 mm (3.0 inches)	79%	very high
November Weather	12°C (53°F)	89 mm (3.5 inches)	83%	moderate
December Weather	9°C (48°F)	98 mm (3.8 inches)	84%	moderate