Boise, Idaho
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 24° 37° -17° (1950) 63° (1953) 1.39" 4.9"
February 29° 45° -15° (1989) 71° (1992) 1.14" 3.3"
March 34° 54° 6° (1971) 81° (1978) 1.41" 1.5"
April 39° 62° 19° (1968) 92° (1987) 1.27" 0.3"
May 47° 71° 22° (1982) 99° (2003) 1.27" 0.1"
June 54° 80° 31° (1995) 109° (1940) 0.74" 0"
July 60° 89° 35° (1986) 111° (1960) 0.39" 0"
August 60° 88° 34° (1992) 110° (1961) 0.3" 0"
September 51° 77° 23° (1970) 102° (1945) 0.76" 0"
October 41° 64° 11° (1971) 94° (1997) 0.76" 0.1"
November 32° 48° -3° (1985) 78° (1999) 1.38" 2.9"
December 24° 37° -25° (1990) 65° (1964) 1.38" 6.4"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 56° 83° 41° (1977) 102° (1945) 0.02" NA
Sep 2 56° 83° 42° (1999) 101° (1950) 0.02" NA
Sep 3 56° 82° 37° (1956) 101° (2007) 0.02" NA
Sep 4 55° 82° 40° (1969) 99° (1998) 0.02" NA
Sep 5 55° 81° 36° (1969) 100° (1963) 0.02" NA
Sep 6 54° 81° 40° (1945) 98° (1955) 0.02" NA
Sep 7 54° 81° 34° (1992) 97° (1955) 0.02" NA
Sep 8 54° 80° 37° (1976) 95° (2005) 0.02" NA
Sep 9 53° 80° 34° (1970) 95° (1997) 0.02" NA
Sep 10 53° 79° 36° (1989) 97° (1990) 0.02" NA
Sep 11 53° 79° 35° (1982) 97° (1963) 0.03" NA
Sep 12 52° 78° 32° (1970) 94° (1963) 0.03" NA
Sep 13 52° 78° 31° (1992) 94° (1945) 0.03" NA
Sep 14 52° 78° 23° (1970) 101° (2000) 0.03" NA
Sep 15 51° 77° 36° (1971) 94° (2002) 0.03" NA
Sep 16 51° 77° 33° (1965) 93° (1998) 0.03" NA
Sep 17 51° 77° 24° (1965) 95° (1998) 0.03" NA
Sep 18 50° 76° 27° (1965) 96° (1981) 0.03" NA
Sep 19 50° 76° 31° (1978) 90° (1952) 0.03" NA
Sep 20 50° 75° 33° (1983) 89° (1979) 0.03" NA
Sep 21 49° 75° 30° (1993) 95° (1967) 0.03" NA
Sep 22 49° 75° 31° (1993) 99° (1966) 0.03" NA
Sep 23 49° 74° 29° (1984) 94° (1987) 0.03" NA
Sep 24 48° 74° 28° (1984) 94° (1947) 0.03" NA
Sep 25 48° 73° 28° (1972) 95° (1963) 0.03" NA
Sep 26 48° 73° 35° (1984) 93° (1963) 0.03" NA
Sep 27 47° 73° 32° (1950) 92° (1957) 0.02" NA
Sep 28 47° 72° 31° (1999) 95° (1963) 0.02" NA
Sep 29 47° 72° 27° (1954) 95° (1992) 0.02" NA
Sep 30 46° 72° 29° (1954) 96° (1992) 0.02" NA
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