Windsor Weather in September

What's the weather like in Windsor (Colorado) in September 2025?

The climate in Windsor during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Windsor and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (76°F), whilst at night 8°C (47°F) is normal.

Windsor weather averages (imperial / metric)
Daytime temperature 24.2°C 75.6°F
Nightly temperature 8.2°C 46.8°F
Average temperature 16.2°C 61.2°F
Daily sunshine 9.7 hrs
Avg rainfall 33 mm 1.3 ins
Rainy days 7 days
Sea temperature 17.8°C 64°F
Humidity 50%
Windspeed 15.5kph 10 mph

On average September is the 6th wettest month of the year in Windsor with around 33mm 1.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.7 hours of sunshine per day.

September temperatures in Windsor

Windsor average temperature in September

September rainfall

Windsor average rain in September

September hourly sunshine

Windsor average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Windsor in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Windsor weather stats

Windsor weather statistics
Hottest month: July 30.1°C 86.2°F
Driest month: January 11mm 0.4ins
Sunniest month: September 9.7hrs
Coldest month: January 5°C 41°F
Wettest month: May 71mm 2.8ins
Map showing location of Windsor (40.47748, -104.90136) Windsor map pin © Google

Locations nearby

Top United States locations