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Hourly
7 Days
14 Days
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Monthly
°C
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°Celsius
°Fahrenheit
Monthly Historical Averages
Castle Rock, WA
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April
Average Temperature
High
15°
Feels 14
Low
4°
Feels 3
Average Precipitation
15 Days
Rain amount
88.4mm
Snow amount
0.1cm
Content continues below
Daily Historical Averages
April 2026
S
M
T
W
T
F
S
1
2
11°
3
15°
4
18°
5
23°
6
22°
7
15°
8
15°
9
16°
10
14°
11
16°
12
14°
13
14°
14
15°
15
14°
16
15°
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Thursday, April 2, 2026
Day
11°
Feels 9
Wind
18 km/h W
Gust
27 km/h
Humidity
58%
P.O.P
40%
Rain
~1 mm
Night
1°
Feels -1
Wind
14 km/h S
Gust
21 km/h
Humidity
100%
P.O.P
20%
Historical Averages
Apr 2
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.