Lewiston, Idaho
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 30° 42° -22° (1950) 66° (1953) 1.08" 2.4"
February 31° 47° -18° (1884) 72° (1986) 0.81" 2.1"
March 36° 55° 2° (1955) 80° (1923) 1.15" 0.7"
April 40° 62° 20° (1966) 99° (1946) 1.32" 0"
May 47° 71° 23° (1954) 104° (1934) 1.61" 0"
June 53° 79° 34° (1951) 109° (1936) 1.24" 0"
July 60° 89° 41° (1955) 117° (1939) 0.66" 0"
August 59° 89° 41° (1992) 115° (1961) 0.69" 0"
September 51° 78° 27° (1926) 108° (1944) 0.67" 0"
October 41° 63° 15° (2002) 94° (1943) 0.96" 0"
November 34° 48° -3° (1955) 77° (1999) 1.18" 1.8"
December 28° 40° -23° (1919) 67° (1921) 0.97" 3.5"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 56° 84° 44° (1999) 102° (1938) 0.02" 0"
Sep 2 55° 84° 43° (1999) 105° (1938) 0.03" 0"
Sep 3 55° 83° 39° (1956) 103° (1938) 0.02" 0"
Sep 4 55° 83° 39° (1956) 101° (1942) 0.02" 0"
Sep 5 55° 83° 40° (1956) 103° (1944) 0.03" 0"
Sep 6 54° 82° 36° (1895) 108° (1944) 0.02" 0"
Sep 7 54° 82° 38° (1960) 106° (1944) 0.02" 0"
Sep 8 54° 82° 37° (1962) 102° (1944) 0.02" 0"
Sep 9 53° 81° 40° (1959) 103° (1944) 0.02" 0"
Sep 10 53° 81° 33° (1895) 102° (1944) 0.02" 0"
Sep 11 53° 80° 36° (1895) 103° (1944) 0.02" 0"
Sep 12 52° 80° 36° (1970) 98° (1944) 0.02" 0"
Sep 13 52° 80° 33° (1970) 99° (1937) 0.02" 0"
Sep 14 52° 79° 32° (1970) 100° (1937) 0.02" 0"
Sep 15 51° 79° 35° (1970) 101° (1937) 0.02" 0"
Sep 16 51° 78° 35° (1965) 97° (1981) 0.02" 0"
Sep 17 51° 78° 28° (1965) 101° (1938) 0.03" 0"
Sep 18 50° 77° 35° (1965) 101° (1938) 0.02" 0"
Sep 19 50° 77° 30° (1895) 100° (1922) 0.02" 0"
Sep 20 50° 76° 34° (1983) 102° (1939) 0.02" 0"
Sep 21 49° 76° 29° (1895) 101° (1967) 0.03" 0"
Sep 22 49° 76° 34° (1955) 99° (1966) 0.02" 0"
Sep 23 49° 75° 31° (2000) 97° (2001) 0.03" 0"
Sep 24 48° 75° 27° (1926) 94° (1943) 0.02" 0"
Sep 25 48° 74° 28° (1926) 95° (1943) 0.02" 0"
Sep 26 47° 73° 30° (1934) 94° (1914) 0.02" 0"
Sep 27 47° 73° 35° (1945) 93° (1963) 0.03" 0"
Sep 28 47° 72° 33° (1985) 95° (1963) 0.02" 0"
Sep 29 46° 72° 31° (1985) 88° (1963) 0.03" 0"
Sep 30 46° 71° 30° (1954) 89° (1976) 0.02" 0"
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