Spring
60°F / 34°F
March, April, May: about 5.6 in of rain and 20 in of snow.
Plan a visit
Best time to visit Castle Rock
May, June, September bring mild highs and the least rain.
Best time to visit
May · June · September
Highs between 65°F and 85°F with the least rain of the year. Hottest: July (86°F). Coldest nights: January (18°F). Wettest: August.
Castle Rock by season
Summer
83°F / 54°F
June, July, August: about 7.0 in of rain.
Fall
65°F / 36°F
September, October, November: about 3.0 in of rain and 10 in of snow.
Winter
46°F / 19°F
December, January, February: about 2.0 in of rain and 28 in of snow.
Month-by-month planner
| Month | Weather | High / low | Rain | Local guides |
|---|---|---|---|---|
| January | Cool | 46°F / 18°F | 0.60 in | |
| February | Cool | 47°F / 20°F | 0.70 in | Valentine’s Day |
| March | Cool | 54°F / 27°F | 1.5 in | St. Patrick’s Day |
| April | Good | 59°F / 33°F | 2.1 in | |
| May | Great | 68°F / 42°F | 2.0 in | |
| June | Great | 80°F / 51°F | 2.2 in | Fourth of July |
| July | Good | 86°F / 56°F | 2.3 in | Fourth of July |
| August | Wet | 84°F / 55°F | 2.5 in | |
| September | Great | 77°F / 47°F | 1.4 in | Halloween |
| October | Good | 65°F / 35°F | 0.80 in | Halloween |
| November | Cool | 54°F / 26°F | 0.80 in | Halloween, Thanksgiving, Christmas |
| December | Cool | 46°F / 18°F | 0.70 in | Christmas, New Year’s Eve |
“Great” means highs between 65°F and 85°F with fewer than 10 wet days. Averages are NOAA’s 1991–2020 normals for the Castle Rock station, not a forecast.
See Castle Rock before you go
A DRIVE AROUND TOWN
Castle Rock - Colorado - 4K Downtown Drive
Castle Rock - Colorado - 4K Downtown Drive. A film shared by Mileage Mike Travels.
Watch on YouTube ↗
THINGS TO DO · YOUTUBE SHORT
Hiking up to the Rock
The short climb in Rock Park toward the butte that gives the town its name, with views over downtown. A Short shared by Espi Agency | Colorado Real Estate.
Watch on YouTube ↗Questions
What is the best month to visit Castle Rock?
May, June, September: highs between 65°F and 85°F with the least rain.
What is the hottest month in Castle Rock?
July, averaging 86°F highs.
What is the coldest month in Castle Rock?
January, with average lows of 18°F.
What is the rainiest month in Castle Rock?
August, averaging 2.5 in of precipitation.
When are the big holidays in Castle Rock?
See the local guides: Halloween (October), Thanksgiving (November), Christmas lights (late November to December), New Year’s Eve.