nomadseason

September Weather in Windsor, United States

Last updated: June 24, 2025

In Windsor, United States, the average temperature in September is a pleasant 22°C (71°F). However, be prepared for fluctuations, as temperatures can dip to a minimum of 6°C (43°F) and soar to a maximum of 33°C (93°F). During this month, you can expect about 69 mm (2.7 in) of precipitation over approximately 6 days, contributing to an average humidity level of 79%.

September Temperature in Windsor

In September in Windsor, the average temperature is 22°C (71°F), with maximums reaching 33°C (93°F) and minimums dropping as low as 6°C (43°F). This weather makes Windsor a great destination for travelers looking to enjoy mild and versatile conditions.

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 22°C (71°F), with highs reaching up to 33°C (93°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec303344536675787471584237
Data source: Temperature data for Windsor generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Windsor

In Windsor in September, the precipitation amount is 69 mm (2.7 in) over a period of 6 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 69 mm (2.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec7979127125138108116128691238964
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Windsor

In Windsor in September humidity is 79%. With an average temperature of 22°C (71°F), this humidity feels like a warm, sticky embrace that can make any outdoor adventure quite challenging for traveling; it's advisable to stay hydrated and take breaks in the shade to fully enjoy the sights.

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 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
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.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)79 mm (3.1 inches)84%moderate
February Weather0°C (33°F)79 mm (3.1 inches)82%moderate
March Weather7°C (44°F)127 mm (5.0 inches)84%high
April Weather12°C (53°F)125 mm (4.9 inches)83%very high
May Weather19°C (66°F)138 mm (5.4 inches)80%very high
June Weather24°C (76°F)108 mm (4.2 inches)83%extreme
July Weather25°C (78°F)116 mm (4.6 inches)82%very high
August Weather24°C (75°F)128 mm (5.0 inches)82%very high
September Weather22°C (71°F)69 mm (2.7 inches)79%very high
October Weather14°C (58°F)123 mm (4.8 inches)79%high
November Weather6°C (42°F)89 mm (3.5 inches)88%moderate
December Weather3°C (37°F)64 mm (2.5 inches)87%moderate

Compare Windsor's Climate with Cities Worldwide