Marshalltown, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 26° -31° (1912) 65° (2002) 0.95" 7.8"
February 13° 33° -35° (1996) 72° (1921) 1.05" 6.6"
March 25° 45° -32° (1962) 90° (1986) 2.39" 4.4"
April 37° 59° 4° (1982) 94° (1980) 3.31" 1.2"
May 49° 71° 20° (1907) 104° (1934) 4.25" 0"
June 59° 81° 30° (1943) 105° (1934) 5.57" 0"
July 63° 84° 42° (1947) 112° (1936) 4.58" 0"
August 60° 82° 35° (1915) 109° (1934) 4.74" 0"
September 50° 75° 20° (1942) 103° (1939) 3.53" 0"
October 38° 62° -3° (1925) 94° (1953) 2.63" 0.2"
November 26° 45° -11° (1977) 81° (1938) 2.16" 2.3"
December 14° 31° -28° (1985) 71° (1998) 1.24" 7.1"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 43° 66° 26° (1909) 88° (1901) 0.12" NA
May 2 43° 66° 25° (1908) 91° (1901) 0.12" NA
May 3 44° 66° 22° (2005) 87° (1952) 0.12" NA
May 4 44° 67° 20° (1907) 90° (1952) 0.12" NA
May 5 45° 67° 26° (2005) 89° (1924) 0.12" NA
May 6 45° 67° 29° (1989) 95° (1934) 0.12" NA
May 7 46° 68° 26° (1906) 91° (1934) 0.12" NA
May 8 46° 68° 30° (1931) 93° (1934) 0.12" NA
May 9 46° 69° 22° (1945) 94° (1934) 0.12" NA
May 10 47° 69° 29° (1966) 90° (1922) 0.13" NA
May 11 47° 69° 27° (1907) 89° (1900) 0.13" NA
May 12 48° 70° 31° (1946) 90° (1902) 0.13" NA
May 13 48° 70° 30° (1895) 93° (1940) 0.13" NA
May 14 48° 70° 32° (1966) 93° (1932) 0.13" NA
May 15 49° 71° 33° (1910) 94° (1941) 0.13" NA
May 16 49° 71° 31° (1942) 89° (1911) 0.13" NA
May 17 50° 72° 33° (1915) 91° (1917) 0.14" NA
May 18 50° 72° 22° (1933) 94° (1934) 0.14" NA
May 19 50° 72° 32° (1929) 96° (1998) 0.14" NA
May 20 51° 73° 30° (1907) 94° (1934) 0.14" NA
May 21 51° 73° 30° (1931) 93° (1934) 0.14" NA
May 22 52° 73° 32° (1931) 100° (1925) 0.14" NA
May 23 52° 74° 30° (1963) 93° (1921) 0.15" NA
May 24 52° 74° 34° (1924) 96° (1939) 0.15" NA
May 25 53° 74° 34° (1897) 95° (1926) 0.15" NA
May 26 53° 75° 34° (1961) 93° (1914) 0.15" NA
May 27 53° 75° 33° (1907) 92° (1900) 0.16" NA
May 28 54° 75° 32° (1947) 94° (1913) 0.16" NA
May 29 54° 76° 31° (1947) 102° (1934) 0.16" NA
May 30 54° 76° 35° (1965) 104° (1934) 0.17" NA
May 31 55° 76° 33° (1897) 104° (1934) 0.17" NA
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