Lowest March Temperatures in Ottumwa

A list of the lowest temperatures ever recorded in the month of March in Ottumwa, Iowa from 1894–2024.
What's the coldest it has ever gotten in Ottumwa in March?
The coldest March temperature in Ottumwa, Iowa history was -20 °F which occurred on March 1, 1962.
Rank Temperature Date
1 -20 °F March 1, 1962
2 -15 °F March 5, 1960
3 -12 °F March 10, 1934
4 -11 °F March 6, 1960
4 -11 °F March 2, 1913
6 -9 °F March 3, 2014
7 -8 °F March 4, 1960
8 -7 °F March 4, 1978
8 -7 °F March 11, 1948
8 -7 °F March 8, 1943
11 -6 °F March 2, 2014
11 -6 °F March 5, 1978
11 -6 °F March 12, 1948
11 -6 °F March 19, 1923
15 -5 °F March 7, 1943
16 -4 °F March 4, 2002
16 -4 °F March 3, 2002
16 -4 °F March 1, 1913
19 -3 °F March 12, 1998
19 -3 °F March 7, 1960