Castle Rock weather in September (Colorado, United States of America)

What weather conditions can you expect in Castle Rock this September? Get all the weather information you need to plan your visit.

Temperatures

For September, the weather in Castle Rock is generally perfect, featuring high temperatures and moderate rainfall. Daytime temperatures hover around 25°C, while nights can cool down to about 8°C.

Precipitation

Castle Rock in September usually receives moderate rainfall, averaging around 43 mm for the month. Past climate data indicates that roughly 7 days will see rain.

Average sunshine

Expect sunny days throughout the month, with an estimated 270 hours of sunshine. Making it a pleasant time to visit Castle Rock.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit. June, August and September generally stand out with the best circumstances. While January, February and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Castle Rock climate page with graphs.

 

Castle Rock, monthly averages in September

Min Temperature 8°C  

Max Temperature 25°C  

Chance of Rain 24%  

Precipitation 43 mm  

Rainy days 7 days  

Humidity 50% *  

Sunshine 270 hours *  

Percentage Sunshine 73% *  

Data from: Denver, the United States of America (42 KM, 26 Miles).

Where to go in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Castle Rock, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

5/10

Outdoor sports

10/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Castle Rock.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.