Castle Rock Weather in October

What's the weather like in Castle Rock (Colorado) in October 2025?

The climate in Castle Rock during October can be summarized as cool and dry.

October is in the fall / autumn in Castle Rock and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 19°C (65°F), whilst at night 0°C (32°F) is normal.

Castle Rock weather averages (imperial / metric)
Daytime temperature 18.6°C 65.4°F
Nightly temperature 0.1°C 32.1°F
Average temperature 9.3°C 48.7°F
Daily sunshine 8.8 hrs
Avg rainfall 24 mm 1 ins
Rainy days 5 days
Sea temperature 16°C 60.7°F
Humidity 48%
Windspeed 15.5kph 10 mph

On average October is the 5th driest month of the year in Castle Rock with around 24mm 1 inches of rain making it a dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.8 hours of sunshine per day.

October temperatures in Castle Rock

Castle Rock average temperature in October

October rainfall

Castle Rock average rain in October

October hourly sunshine

Castle Rock average rain in October

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 Castle Rock in October 2025.

Other monthly averages

Best places to visit in October

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Castle Rock weather stats

Castle Rock weather statistics
Hottest month: July 29.3°C 84.7°F
Driest month: January 12mm 0.5ins
Sunniest month: September 9.8hrs
Coldest month: January 6°C 42.8°F
Wettest month: May 64mm 2.5ins
Map showing location of Castle Rock (39.37221, -104.85609) Castle Rock map pin © Google

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