Royal Slope, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 23° 35° -26° (1957) 64° (1971) 0.93" NA
February 28° 43° -26° (1950) 67° (1995) 0.85" NA
March 31° 53° 6° (1945) 79° (1960) 0.86" NA
April 36° 61° 16° (1945) 91° (1977) 0.62" NA
May 43° 69° 23° (1954) 99° (1983) 0.73" NA
June 49° 76° 31° (1943) 106° (1961) 0.52" NA
July 54° 83° 34° (1948) 111° (1941) 0.39" NA
August 54° 83° 36° (1980) 114° (1961) 0.33" NA
September 47° 74° 26° (1985) 102° (1950) 0.4" NA
October 37° 61° 14° (1971) 91° (1943) 0.57" NA
November 31° 45° -14° (1985) 73° (1975) 1.04" NA
December 24° 35° -15° (1968) 63° (1959) 1.21" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 27° 38° -4° (1985) 59° (1951) 0.04" NA
Dec 2 27° 38° -6° (1985) 58° (1941) 0.04" NA
Dec 3 27° 38° 8° (1985) 58° (1975) 0.04" NA
Dec 4 26° 37° 3° (1972) 58° (1975) 0.04" NA
Dec 5 26° 37° 2° (1972) 55° (1990) 0.04" NA
Dec 6 26° 37° -1° (1956) 54° (1945) 0.04" NA
Dec 7 26° 37° 4° (1956) 55° (1987) 0.04" NA
Dec 8 26° 36° -8° (1972) 54° (1979) 0.04" NA
Dec 9 25° 36° 0° (1972) 56° (1953) 0.04" NA
Dec 10 25° 36° -5° (1972) 57° (1987) 0.04" NA
Dec 11 25° 36° -2° (1972) 57° (1993) 0.04" NA
Dec 12 25° 36° 2° (1972) 54° (1974) 0.04" NA
Dec 13 25° 35° -7° (1972) 54° (1998) 0.04" NA
Dec 14 24° 35° -5° (1972) 52° (1953) 0.04" NA
Dec 15 24° 35° -4° (1972) 63° (1959) 0.04" NA
Dec 16 24° 35° -9° (1964) 58° (1959) 0.04" NA
Dec 17 24° 35° -12° (1964) 54° (1998) 0.04" NA
Dec 18 24° 34° 0° (1964) 52° (1956) 0.04" NA
Dec 19 24° 34° 6° (1949) 52° (1966) 0.04" NA
Dec 20 23° 34° -5° (1998) 51° (1941) 0.04" NA
Dec 21 23° 34° -8° (1990) 53° (1994) 0.04" NA
Dec 22 23° 34° -7° (1990) 55° (1972) 0.04" NA
Dec 23 23° 34° -12° (1983) 56° (1950) 0.04" NA
Dec 24 23° 34° -11° (1983) 53° (1957) 0.04" NA
Dec 25 23° 34° -5° (1948) 60° (1980) 0.04" NA
Dec 26 23° 34° -7° (1948) 60° (1980) 0.04" NA
Dec 27 23° 34° -9° (1948) 58° (1980) 0.04" NA
Dec 28 23° 34° -10° (1996) 56° (1953) 0.04" NA
Dec 29 23° 34° -13° (1968) 57° (1949) 0.03" NA
Dec 30 23° 33° -15° (1968) 56° (1998) 0.03" NA
Dec 31 23° 33° -12° (1968) 52° (1962) 0.03" NA
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