nomadseason

September Weather in Windsor, United States

Last updated: June 24, 2025

In Windsor, United States, the average temperature in September is a pleasant 23°C (73°F). Expect a comfortable range, with minimums dipping to 7°C (44°F) and maximums reaching up to 34°C (93°F). This month brings about 65 mm (2.6 in) of precipitation spread over 6 days, along with an average humidity of 72%. Get ready for a month of varied weather!

September Temperature in Windsor

In September in Windsor, the average temperature is 23°C (73°F). The maximum can reach 34°C (93°F), while the minimum can drop to as low as 7°C (44°F). This temperature range makes it an ideal time to explore Windsor, offering a pleasant climate for outdoor activities and sightseeing.

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 23°C (73°F), with highs reaching up to 34°C (93°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec333548556777807773584540
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 65 mm (2.6 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 65 mm (2.6 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec646011511118310712510365985337
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 72%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, making travel exhilarating yet slightly sticky, as the air clings to your skin and invites you to seek out cool, refreshing places to explore.

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 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%78%75%77%82%83%81%78%72%72%84%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec35610101111109753
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 Weather1°C (33°F)64 mm (2.5 inches)80%moderate
February Weather2°C (35°F)59 mm (2.3 inches)78%moderate
March Weather9°C (48°F)115 mm (4.5 inches)75%high
April Weather13°C (55°F)111 mm (4.4 inches)77%very high
May Weather19°C (67°F)183 mm (7.2 inches)82%very high
June Weather25°C (77°F)106 mm (4.2 inches)83%extreme
July Weather27°C (80°F)125 mm (4.9 inches)81%extreme
August Weather25°C (77°F)103 mm (4.1 inches)78%very high
September Weather23°C (73°F)65 mm (2.6 inches)72%very high
October Weather15°C (59°F)98 mm (3.8 inches)72%high
November Weather7°C (46°F)53 mm (2.1 inches)84%moderate
December Weather4°C (40°F)37 mm (1.5 inches)86%moderate

Compare Windsor's Climate with Cities Worldwide