Castle Rock Weather Year-Round — Best Time to Visit
Castle Rock, United States has mild weather year-round. The best time to visit is August (score: 89/100). Annual average high: 15.5°C, total rainfall: 487mm.
When is the best time to visit Castle Rock?
89
August is the best month to visit Castle Rock with a travel score of 89/100 (Excellent).
Expect highs of 27.4°C, 9 rain days, and 12.4 hours of daily sunshine.
View August weather details →Travel Score by Month
60
Jan
61
Feb
66
Mar
68
Apr
74
May
86
Jun
88
Jul
89
Aug
88
Sep
79
Oct
68
Nov
60
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Castle Rock each month?
15.5°C
Avg High
1.1°C
Avg Low
487mm
Annual Rain
How much rain does Castle Rock get?
Castle Rock receives 487mm of rain annually. The wettest month is typically May with 83mm, while January is the driest.
What is the weather like each month in Castle Rock?
January
60
4°C
Low: -10°C
4 rain days
Mixed
February
61
5°C
Low: -10°C
5 rain days
Good
March
66
9°C
Low: -5°C
7 rain days
Good
April
68
13°C
Low: -2°C
9 rain days
Good
May
74
19°C
Low: 4°C
11 rain days
Good
June
86
26°C
Low: 11°C
9 rain days
Excellent
July
88
29°C
Low: 14°C
10 rain days
Excellent
August
Best time to visit89
27°C
Low: 13°C
9 rain days
Excellent
September
88
24°C
Low: 9°C
6 rain days
Excellent
October
79
17°C
Low: 2°C
5 rain days
Good
November
68
10°C
Low: -4°C
5 rain days
Good
December
60
4°C
Low: -9°C
4 rain days
Good
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Data based on 1994–2024 averages · Last updated: 2024-12-31