The best times to visit Castle Rock for ideal weather are

May 21st to October 14th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Castle Rock Travel Info

Weather in Castle Rock


Average temperatures in Castle Rock vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a low chance of precipitation most of the year. The area is somewhat temperate — in the 41st percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Castle Rock, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 89.7°F (32.1°C) with temperatures rarely dropping below 59.7°F (15.4°C) at night.

Castle Rock Temperatures (Fahrenheit)


Castle Rock Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Castle Rock Perceived Temperature (F)


Castle Rock Perceived Temperature (C)



Average Castle Rock Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 45.5 31 18.4
Feb 46.1 31.6 19.7
Mar 58.1 42.2 28.3
Apr 62.3 46.7 33.5
May 70.3 55.3 42.3
Jun 84.1 68 52.7
Jul 88 72.6 59
Aug 87 71.5 57.7
Sep 79.8 63.9 49.8
Oct 66.5 50.6 37.3
Nov 56.5 40.4 27
Dec 44.1 29.7 17.5

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 7.5 -0.6 -7.6
Feb 7.8 -0.2 -6.8
Mar 14.5 5.7 -2.1
Apr 16.8 8.2 0.8
May 21.3 12.9 5.7
Jun 28.9 20 11.5
Jul 31.1 22.6 15
Aug 30.6 21.9 14.3
Sep 26.6 17.7 9.9
Oct 19.2 10.3 2.9
Nov 13.6 4.7 -2.8
Dec 6.7 -1.3 -8.1



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Castle Rock are December, November, and then January. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid to late November. For example, on the week of November 19th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid May with an average of 2 days of significant precipitation the week of May 7th.

When can you find snow in Castle Rock? Weather stations report large amounts of snow likely to be deepest around October, especially close to late October to early November. The best time to ski (if at all) in Castle Rock is often around around October 15th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Castle Rock.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Castle Rock (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 5% 4.4 0.5
Feb 9% 2.5 0.6
Mar 7% 2 0.8
Apr 16% 2.8 2.1
May 19% 1.2 2.4
Jun 14% 0 2.2
Jul 16% 0 2.3
Aug 14% 0 2
Sep 12% 0 2
Oct 12% 4.8 1.4
Nov 4% 2.4 0.4
Dec 4% 2.4 0.4

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 5 11.2 1.3
Feb 9 6.4 1.5
Mar 7 5.1 2
Apr 16 7.1 5.3
May 19 3 6.1
Jun 14 0 5.6
Jul 16 0 5.8
Aug 14 0 5.1
Sep 12 0 5.1
Oct 12 12.2 3.6
Nov 4 6.1 1
Dec 4 6.1 1


Humidity and Wind

Castle Rock has some comfortably humid months, and slightly dry months in the opposite season. The least humid month is March (30.3% relative humidity), and the most humid month is December (41.6%).

Wind in Castle Rock is usually calm. The windiest month is April, followed by March and June. April’s average wind speed of around 8.5 knots (9.7 MPH or 15.7 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid April where average top sustained speeds reach 18.7 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Castle Rock.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 6.5 Light breeze 13.9 Significant breeze
Feb 6.9 Light breeze 15.1 Significant breeze
Mar 7.6 Gentle breeze 16 Significant breeze
Apr 8.5 Gentle breeze 17.6 Strong breeze
May 7.4 Gentle breeze 16.6 Significant breeze
Jun 7.4 Gentle breeze 17.1 Strong breeze
Jul 6.7 Light breeze 17 Significant breeze
Aug 6.5 Light breeze 15.4 Significant breeze
Sep 6.2 Light breeze 13.8 Significant breeze
Oct 6.3 Light breeze 13.8 Significant breeze
Nov 6.4 Light breeze 13.6 Significant breeze
Dec 6.2 Light breeze 13.1 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 37.8%
Feb 41%
Mar 30.3%
Apr 36.4%
May 40.3%
Jun 32.2%
Jul 35.6%
Aug 33.1%
Sep 33.3%
Oct 36.9%
Nov 32%
Dec 41.6%


Is it Safe to Travel to Castle Rock?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Castle Rock, CO, US is July, followed by June and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Castle Rock in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 50 in November means 50% of the tourists vs. July.



Overall Castle Rock Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 78.5°F (25.8°C) and 49.2°F (9.6°C) with warmer temperatures in the later months. Rain is somewhat common with 2 to 6 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see the most precipitation with 4 to 5 days of precipitation per month. June – August is the busiest season for tourism in Castle Rock, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 83.1°F (28.4°C) and 52.2°F (11.2°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 1 to 4 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Castle Rock to be enjoyable for warm weather travelers. The average high during this season is between 49.2°F (9.6°C) and 39.8°F (4.3°C). On average, it rains or snows a smalll amount: 1 to 3 times per month. These times of year are fairly slow with tourists.


Best Times to Travelthe United States › Castle Rock, CO, US