Earliest and Latest Days at or Below 32° F in Dubuque

This is a list of the earliest and latest days in a winter season where the low temperature fell to at least 32 °F in Dubuque, Iowa history. It is based on NOAA data from the years 1938–2024.

Earliest freezing temperature in Dubuque?

The earliest in a winter season that Dubuque, Iowa has recorded a low temperature of 32 °F or below is September 15 which happened in 2007.

Latest freezing temperature in Dubuque?

The latest in a winter season that Dubuque, Iowa has recorded a low temperature of 32 °F or below is May 29 which has happened twice, most recently in 1965.

Earliest Days ≤ 32 °F

Date	Year	Temperature
September 15	2007	32 °F
September 20	1991	31 °F
September 20	1956	28 °F
September 22	1995	31 °F
September 22	1983	32 °F
September 22	1974	31 °F
September 23	2012	31 °F
September 23	1995	32 °F
September 23	1989	32 °F
September 23	1983	32 °F
September 23	1974	31 °F
September 24	2012	28 °F
September 24	1989	29 °F
September 25	1942	31 °F
September 26	1984	32 °F
September 27	1991	32 °F
September 28	1942	30 °F
September 29	2003	30 °F
September 29	1992	30 °F
September 29	1984	28 °F
September 29	1967	31 °F
September 29	1949	32 °F

Latest Days ≤ 32 °F

Date	Year	Temperature
May 29	1965	31 °F
May 29	1947	32 °F
May 23	1963	31 °F
May 17	2009	32 °F
May 16	1997	31 °F
May 15	2016	32 °F
May 15	1997	32 °F
May 13	2013	32 °F
May 13	1971	32 °F
May 13	1953	32 °F
May 12	1969	32 °F
May 10	1966	24 °F
May 9	2020	25 °F
May 9	2010	31 °F
May 9	1966	28 °F
May 8	2020	30 °F
May 8	1976	31 °F
May 8	1960	32 °F
May 7	1989	28 °F
May 7	1980	32 °F
May 7	1967	31 °F
May 7	1954	31 °F