Annual mean 10°C · wettest around May · prevailing wind E
Warmest
29.0 °C
Coldest
3.1 °C
Wettest
31%
Windiest
5.1 m/s
Prevailing
E
4.1 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Castle Rock over the whole year is 10°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -4°C. Castle Rock has no sharply defined rainy season: the chance of rain on a given day runs from 16% in December, the driest month, to 30% in May, the wettest. Winds in Castle Rock are highest in April, averaging 4.3 m/s (15 km/h), and lightest in January, at 3.5 m/s (13 km/h). The prevailing wind is from the E. The clearest skies in Castle Rock come in September, when the sky is typically 36% covered; May is the cloudiest month, at 53%.
Month by month Castle Rock climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
4°C
-4°C
-2°C
18%
43%
3.5 m/s
0
0
13
February
5°C
-4°C
-2°C
20%
43%
3.9 m/s
1
0
19
March
9°C
-1°C
3°C
24%
48%
4.1 m/s
5
0
34
April
13°C
3°C
7°C
24%
50%
4.3 m/s
18
0
52
May
17°C
8°C
12°C
30%
53%
4.1 m/s
42
2
69
June
25°C
15°C
21°C
27%
44%
3.8 m/s
72
30
52
July
28°C
18°C
25°C
28%
43%
3.7 m/s
64
58
27
August
27°C
16°C
24°C
24%
43%
3.5 m/s
73
50
36
September
24°C
12°C
20°C
22%
36%
3.5 m/s
73
23
59
October
16°C
5°C
11°C
20%
36%
3.5 m/s
40
1
66
November
10°C
0°C
4°C
18%
37%
3.6 m/s
10
0
42
December
6°C
-3°C
0°C
16%
38%
3.6 m/s
1
0
22
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Castle Rock weather by season
Year round, Castle Rock has days of about 4°C at their warmest in January, its coolest month, and 28°C in July, its warmest; the coolest hours of the day run from -4°C to 18°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around May and least likely around December. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Castle Rock weather in winterDecember to February
High 5°CLow -4°CRain 18%
Winter in Castle Rock has typical daily highs of about 5°C and lows of about -4°C, with a 18% chance of rain on a given day.
Castle Rock weather in springMarch to May
High 13°CLow 4°CRain 26%
Spring in Castle Rock has typical daily highs of about 13°C and lows of about 4°C, with a 26% chance of rain on a given day.
Castle Rock weather in summerJune to August
High 27°CLow 16°CRain 26%
Summer in Castle Rock has typical daily highs of about 27°C and lows of about 16°C, with a 26% chance of rain on a given day.
Castle Rock weather in autumnSeptember to November
High 17°CLow 6°CRain 20%
Autumn in Castle Rock has typical daily highs of about 17°C and lows of about 6°C, with a 20% chance of rain on a given day.
When is the rainy season in Castle Rock?
Castle Rock has no sharply defined rainy season: the chance of rain on a given day runs from 16% in December, the driest month, to 30% in May, the wettest.
What time of year is Castle Rock windiest?
Winds in Castle Rock are highest in April, averaging 4.3 m/s (15 km/h), and lightest in January, at 3.5 m/s (13 km/h). The prevailing wind is from the E.
What is the average temperature in Castle Rock year round?
The average temperature in Castle Rock over the whole year is 10°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -4°C.