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
Jan 1 35° 45° 7° (1979) 58° (1939) 0.22" NA
Jan 2 35° 45° 8° (1979) 57° (1953) 0.22" NA
Jan 3 35° 45° 10° (1950) 58° (1953) 0.23" NA
Jan 4 35° 45° 14° (1959) 56° (1984) 0.22" NA
Jan 5 35° 46° 11° (1942) 58° (2003) 0.22" NA
Jan 6 35° 46° 10° (1937) 56° (2001) 0.23" NA
Jan 7 35° 46° 7° (1937) 58° (2003) 0.22" NA
Jan 8 35° 46° 5° (1937) 58° (1941) 0.22" NA
Jan 9 35° 46° 12° (1974) 56° (1959) 0.22" NA
Jan 10 35° 46° 10° (1949) 59° (1945) 0.23" NA
Jan 11 35° 46° 5° (1937) 58° (1953) 0.23" NA
Jan 12 35° 46° 7° (1937) 55° (1945) 0.23" NA
Jan 13 36° 47° 15° (1963) 59° (1991) 0.22" NA
Jan 14 36° 47° 9° (1950) 58° (1991) 0.22" NA
Jan 15 36° 47° 10° (1947) 58° (1973) 0.23" NA
Jan 16 36° 47° 20° (1937) 58° (1958) 0.23" NA
Jan 17 36° 47° 10° (1943) 56° (1953) 0.22" NA
Jan 18 36° 47° 6° (1950) 59° (1953) 0.22" NA
Jan 19 36° 47° 12° (1935) 62° (2005) 0.22" NA
Jan 20 36° 48° 9° (1935) 59° (2005) 0.22" NA
Jan 21 36° 48° 8° (1962) 60° (1995) 0.21" NA
Jan 22 36° 48° 10° (1943) 64° (1968) 0.19" NA
Jan 23 36° 48° 10° (1943) 59° (1995) 0.2" NA
Jan 24 36° 48° 9° (1943) 61° (1935) 0.19" NA
Jan 25 36° 48° 6° (1950) 59° (2005) 0.19" NA
Jan 26 35° 48° 7° (1950) 61° (1986) 0.2" NA
Jan 27 35° 49° 8° (1957) 62° (2003) 0.19" NA
Jan 28 35° 49° 7° (1957) 65° (1931) 0.2" NA
Jan 29 35° 49° 9° (1957) 62° (1931) 0.19" NA
Jan 30 35° 49° 9° (1980) 61° (1940) 0.19" NA
Jan 31 35° 49° 1° (1950) 63° (1940) 0.2" NA
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