Roundup, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 12° 36° -41° (1969) 70° (1953) 0.43" NA
February 17° 43° -52° (1936) 75° (1932) 0.36" NA
March 24° 51° -33° (1932) 82° (2004) 0.64" NA
April 32° 60° -9° (1936) 91° (1980) 1.28" NA
May 42° 70° 10° (1954) 100° (1934) 2.35" NA
June 50° 79° 31° (1979) 106° (2002) 2.15" NA
July 55° 87° 36° (1955) 111° (2002) 1.65" NA
August 53° 86° 30° (1992) 108° (1961) 1.29" NA
September 43° 75° 15° (1985) 102° (1983) 1.27" NA
October 34° 63° -10° (1919) 95° (1943) 1.03" NA
November 22° 46° -36° (1959) 78° (1933) 0.34" NA
December 15° 38° -44° (1983) 70° (1980) 0.46" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Aug 1 56° 88° 32° (1948) 101° (2007) 0.05" NA
Aug 2 55° 88° 40° (1921) 101° (1973) 0.05" NA
Aug 3 55° 88° 38° (1921) 106° (1934) 0.05" NA
Aug 4 55° 88° 35° (1921) 106° (1941) 0.05" NA
Aug 5 55° 88° 35° (1921) 108° (1961) 0.05" NA
Aug 6 55° 88° 40° (1921) 106° (1983) 0.04" NA
Aug 7 55° 88° 40° (1921) 103° (1971) 0.04" NA
Aug 8 55° 88° 40° (1921) 101° (1971) 0.04" NA
Aug 9 55° 88° 40° (1946) 102° (1940) 0.04" NA
Aug 10 55° 88° 40° (1939) 105° (2003) 0.04" NA
Aug 11 55° 88° 39° (1977) 102° (1984) 0.04" NA
Aug 12 55° 88° 40° (1916) 104° (1940) 0.04" NA
Aug 13 54° 87° 40° (1921) 106° (2003) 0.04" NA
Aug 14 54° 87° 40° (1959) 105° (2003) 0.04" NA
Aug 15 54° 87° 39° (1944) 103° (2003) 0.04" NA
Aug 16 54° 87° 40° (1921) 104° (2003) 0.04" NA
Aug 17 53° 87° 32° (1985) 104° (2003) 0.04" NA
Aug 18 53° 86° 36° (1921) 101° (1943) 0.04" NA
Aug 19 53° 86° 36° (1921) 102° (1942) 0.04" NA
Aug 20 53° 86° 33° (1921) 103° (1942) 0.04" NA
Aug 21 52° 86° 35° (1945) 100° (1969) 0.04" NA
Aug 22 52° 85° 33° (1921) 103° (1937) 0.04" NA
Aug 23 52° 85° 38° (1966) 102° (1969) 0.04" NA
Aug 24 51° 84° 32° (1934) 104° (1969) 0.04" NA
Aug 25 51° 84° 30° (1992) 103° (1969) 0.04" NA
Aug 26 51° 84° 36° (1960) 100° (1970) 0.04" NA
Aug 27 50° 83° 40° (1945) 102° (1971) 0.04" NA
Aug 28 50° 83° 38° (1960) 100° (1971) 0.04" NA
Aug 29 50° 82° 40° (1960) 100° (1943) 0.04" NA
Aug 30 49° 82° 34° (1992) 100° (1954) 0.04" NA
Aug 31 49° 82° 32° (1965) 102° (1940) 0.04" NA
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