Castle Rock, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 35° 47° 1° (1950) 65° (1931) 6.62" 2.4"
February 35° 51° 2° (1950) 73° (1968) 5.07" 1"
March 38° 56° 19° (1955) 81° (1947) 4.68" 0"
April 41° 61° 24° (1936) 90° (2004) 3.79" 0"
May 45° 67° 28° (1937) 99° (2001) 3.18" 0"
June 50° 72° 31° (1932) 100° (1955) 2.26" 0"
July 53° 78° 33° (1932) 105° (1942) 0.83" 0"
August 53° 79° 35° (1935) 108° (1981) 1.15" 0"
September 50° 74° 29° (1934) 104° (1944) 2.05" 0"
October 44° 63° 24° (2002) 90° (1987) 4.01" 0"
November 39° 52° 8° (1955) 77° (1951) 7.71" 0.3"
December 35° 46° 4° (1972) 66° (1934) 6.8" 1.5"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 40° 59° 26° (1938) 77° (1987) 0.14" NA
Apr 2 40° 59° 28° (1938) 85° (1987) 0.15" NA
Apr 3 40° 59° 29° (1931) 75° (1992) 0.14" NA
Apr 4 40° 59° 24° (1936) 79° (1951) 0.14" NA
Apr 5 40° 59° 29° (1997) 80° (2007) 0.14" NA
Apr 6 40° 59° 27° (1938) 82° (2007) 0.14" NA
Apr 7 40° 60° 27° (1952) 75° (1949) 0.13" NA
Apr 8 40° 60° 27° (1952) 81° (1996) 0.13" NA
Apr 9 40° 60° 28° (1935) 74° (1959) 0.13" NA
Apr 10 40° 60° 27° (1933) 82° (1985) 0.14" NA
Apr 11 40° 60° 30° (1965) 86° (2004) 0.12" NA
Apr 12 40° 60° 29° (1933) 85° (1943) 0.13" NA
Apr 13 40° 61° 27° (1968) 83° (2008) 0.13" NA
Apr 14 40° 61° 29° (1975) 82° (1980) 0.12" NA
Apr 15 40° 61° 30° (1967) 84° (1984) 0.13" NA
Apr 16 40° 61° 30° (1977) 86° (1947) 0.13" NA
Apr 17 40° 61° 29° (1968) 83° (1999) 0.12" NA
Apr 18 40° 61° 25° (1931) 83° (1934) 0.13" NA
Apr 19 41° 62° 25° (1931) 85° (1934) 0.12" NA
Apr 20 41° 62° 28° (1952) 84° (1934) 0.12" NA
Apr 21 41° 62° 28° (1951) 84° (1956) 0.13" NA
Apr 22 41° 62° 28° (1972) 79° (1982) 0.12" NA
Apr 23 41° 63° 29° (1954) 81° (2005) 0.12" NA
Apr 24 41° 63° 29° (1950) 82° (1977) 0.12" NA
Apr 25 41° 63° 30° (1943) 80° (1941) 0.12" NA
Apr 26 41° 63° 31° (1943) 80° (2001) 0.11" NA
Apr 27 42° 63° 31° (1937) 90° (2004) 0.12" NA
Apr 28 42° 64° 27° (1945) 84° (1980) 0.11" NA
Apr 29 42° 64° 30° (1937) 83° (1968) 0.1" NA
Apr 30 42° 64° 27° (1939) 86° (1957) 0.11" NA
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