Portland, Missouri
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 18° 39° -33° (1963) 77° (1965) 1.71" NA
February 23° 46° -17° (1988) 84° (1972) 2.02" NA
March 32° 57° -6° (1978) 87° (1985) 3.29" NA
April 42° 67° 17° (1989) 94° (1987) 3.59" NA
May 51° 75° 27° (1989) 93° (1987) 4.82" NA
June 60° 84° 38° (1988) 106° (1988) 4.27" NA
July 65° 89° 44° (1967) 111° (1980) 3.28" NA
August 63° 88° 37° (1986) 109° (1984) 3.72" NA
September 55° 80° 28° (1989) 103° (1984) 3.9" NA
October 44° 69° 17° (1981) 94° (1963) 3.41" NA
November 33° 55° 2° (1991) 85° (1989) 3.69" NA
December 23° 43° -21° (1989) 77° (1991) 2.75" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 59° 84° 39° (1987) 103° (1984) 0.13" NA
Sep 2 59° 84° 49° (1974) 101° (1984) 0.13" NA
Sep 3 59° 84° 43° (1974) 95° (1975) 0.13" NA
Sep 4 59° 84° 37° (1974) 96° (1983) 0.13" NA
Sep 5 58° 83° 43° (1962) 98° (1983) 0.13" NA
Sep 6 58° 83° 33° (1988) 100° (1990) 0.13" NA
Sep 7 58° 83° 36° (1988) 98° (1990) 0.13" NA
Sep 8 57° 82° 40° (1986) 99° (1980) 0.14" NA
Sep 9 57° 82° 48° (1979) 97° (1983) 0.14" NA
Sep 10 57° 82° 40° (1969) 98° (1983) 0.14" NA
Sep 11 56° 81° 40° (1968) 94° (1978) 0.14" NA
Sep 12 56° 81° 41° (1968) 98° (1980) 0.13" NA
Sep 13 56° 81° 38° (1975) 96° (1980) 0.13" NA
Sep 14 55° 80° 40° (1996) 100° (1971) 0.13" NA
Sep 15 55° 80° 39° (1979) 94° (1971) 0.13" NA
Sep 16 54° 80° 37° (1966) 97° (1980) 0.13" NA
Sep 17 54° 79° 37° (1981) 96° (1978) 0.13" NA
Sep 18 54° 79° 38° (1981) 97° (1972) 0.13" NA
Sep 19 53° 79° 35° (1991) 97° (1978) 0.13" NA
Sep 20 53° 78° 35° (1991) 97° (1980) 0.13" NA
Sep 21 53° 78° 35° (1983) 94° (1980) 0.13" NA
Sep 22 52° 78° 34° (1983) 92° (1980) 0.13" NA
Sep 23 52° 78° 28° (1983) 89° (2000) 0.13" NA
Sep 24 52° 77° 28° (1989) 92° (2007) 0.13" NA
Sep 25 51° 77° 33° (1989) 89° (1986) 0.13" NA
Sep 26 51° 77° 35° (1975) 90° (1987) 0.13" NA
Sep 27 51° 76° 33° (1985) 90° (1971) 0.12" NA
Sep 28 50° 76° 36° (1989) 90° (1986) 0.12" NA
Sep 29 50° 76° 35° (1992) 90° (1971) 0.12" NA
Sep 30 49° 75° 28° (1984) 90° (1971) 0.12" NA
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