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Castle Rock, United States Snapshot 2026
Where is Castle Rock?
Castle Rock, United States
- Continent
- Americas
- Country
- United States
- City
- Castle Rock
- Population
- 55.6K
- Elevation
- 1,897 m
- Coordinates
- 39.37°, -104.86°
Castle Rock is a city in United States with a population of approximately 55.6K. Average temperatures range from -11°C (13°F) in January to 29°C (85°F) in July. The best time to visit is June, July, August, September. The city sits at an elevation of 1,897 m above sea level.
Time in Castle Rock right now
Open full time & time zone page 12:12 12
Monday, June 15, 2026
IANA time zone
America/Denver
Daylight saving
DST in effect
MST / MDT
Next DST change
November 1
backward -1h
Live weather in Castle Rock
Daylight in Castle Rock today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 56m
Climate normals for Castle Rock
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April
Poor May
Fair June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 4°C / -11°C | 0°C / -15°C | 5days (20 mm) Good | 7.9h Good | 63% Muggy | 3.4 Moderate | Poor | View Details |
| February | 6°C / -9°C | 1°C / -14°C | 5days (23 mm) Good | 9.1h Good | 60% Moderate | 4.6 Moderate | Poor | View Details |
| March | 10°C / -5°C | 6°C / -9°C | 7days (50 mm) Good | 10.2h Excellent | 57% Moderate | 6 High | Poor | View Details |
| April | 15°C / -1°C | 12°C / -5°C | 8days (44 mm) Wet | 11.3h Excellent | 54% Moderate | 7.1 Very High | Poor | View Details |
| May | 19°C / 5°C | 17°C / 2°C | 14days (87 mm) Wet | 11.6h Excellent | 60% Moderate | 7.8 Very High | Fair | View Details |
| June best | 27°C / 11°C | 26°C / 9°C | 10days (49 mm) Wet | 12.8h Excellent | 51% Moderate | 8.3 Very High | Excellent | View Details |
| July best | 29°C / 15°C | 29°C / 13°C | 11days (57 mm) Wet | 13h Excellent | 51% Moderate | 8.5 Very High | Excellent | View Details |
| August best | 28°C / 14°C | 27°C / 12°C | 10days (47 mm) Wet | 11.9h Excellent | 51% Moderate | 7.8 Very High | Excellent | View Details |
| September best | 26°C / 10°C | 23°C / 8°C | 5days (30 mm) Good | 11h Excellent | 46% Moderate | 6.7 High | Excellent | View Details |
| October | 18°C / 3°C | 15°C / 0°C | 5days (24 mm) Good | 9.6h Good | 49% Moderate | 5.2 High | Fair | View Details |
| November | 11°C / -3°C | 7°C / -7°C | 4days (22 mm) Good | 8.4h Good | 53% Moderate | 3.6 Moderate | Poor | View Details |
| December | 6°C / -7°C | 2°C / -12°C | 4days (13 mm) Good | 7.7h Good | 55% Moderate | 3 Moderate | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 4°C / -11°C . Feb: 6°C / -9°C . Mar: 10°C / -5°C . Apr: 15°C / -1°C . May: 19°C / 5°C . Jun: 27°C / 11°C . Jul: 29°C / 15°C . Aug: 28°C / 14°C . Sep: 26°C / 10°C . Oct: 18°C / 3°C . Nov: 11°C / -3°C . Dec: 6°C / -7°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 20 mm. Feb: 23 mm. Mar: 50 mm. Apr: 44 mm. May: 87 mm. Jun: 49 mm. Jul: 57 mm. Aug: 47 mm. Sep: 30 mm. Oct: 24 mm. Nov: 22 mm. Dec: 13 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 63%. Feb: 60%. Mar: 57%. Apr: 54%. May: 60%. Jun: 51%. Jul: 51%. Aug: 51%. Sep: 46%. Oct: 49%. Nov: 53%. Dec: 55%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 13 km/h . Feb: 15 km/h . Mar: 17 km/h . Apr: 18 km/h . May: 17 km/h . Jun: 16 km/h . Jul: 15 km/h . Aug: 15 km/h . Sep: 15 km/h . Oct: 15 km/h . Nov: 14 km/h . Dec: 14 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 5. Mar: UV 6. Apr: UV 7. May: UV 8. Jun: UV 8. Jul: UV 9. Aug: UV 8. Sep: UV 7. Oct: UV 5. Nov: UV 4. Dec: UV 3.
Frequently Asked Questions
Castle Rock has a population of approximately 55.6K.
The best months to visit Castle Rock are June, July, August, September, when temperatures are pleasant and rainfall is lower.
Castle Rock receives approximately 466mm of rainfall annually across 88 rainy days.
Castle Rock is located in United States, in the Americas region.
Castle Rock sits at an elevation of 1,897 m (6,224 ft) above sea level.