Dubuque Weather Records

Dubuque, Iowa weather averages and records from 1938–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Dubuque, Iowa was 101 °F which occurred on July 25, 2012.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Dubuque, Iowa was -31 °F which occurred on January 31, 2019.
Lowest Temperatures: All-Time By Year
Dubuque Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 26.6 11.3 60 -31 1.3 10.7
February 30.9 15.2 71 -27 1.6 10.5
March 44.2 26.5 85 -20 2.3 5.7
April 57.8 37.3 93 11 4.1 1.9
May 69.3 48.7 95 21 4.3 0.0
June 78.5 58.8 100 36 5.2 0.0
July 81.5 62.2 101 44 4.8 0.0
August 79.7 60.2 101 40 4.0 0.0
September 73.0 52.0 97 28 3.8 0.0
October 59.9 40.1 90 13 2.9 0.5
November 44.8 28.2 75 -17 2.2 2.7
December 31.8 17.4 69 -25 1.8 10.5
Entire year 56.6 38.3 101 -31 38.2 42.6
More Dubuque Weather Records
1938–2024
Highest daily low 78 °F June 27, 1944
Lowest daily high -16 °F January 30, 2019
Greatest daily range
(Difference of high and low)
52 °F January 22, 1991
Greatest difference in daily high
over two conscutive days
51 °F Jan 18–19, 1996
Most daily precipitation 8.9 inches September 14, 1967
Most monthly precipitation 16.0 inches July 2011
Most yearly precipitation 63.4 inches 1961
Most yearly days with precipitation 143 2008
Earliest snow in season October 18 2020
Latest snow in season May 11 1966
Most daily snow 15.0 inches March 5, 1959
Most monthly snow 37.6 inches December 2000
Most yearly snow 84.8 inches 2008
Most snow in a winter 78.7 inches 2007–2008
Greatest snow accumulation 25.0 inches January 28, 1979
Earliest freeze September 20 1991
Earliest day ≥ 80 °F March 17 2012
Earliest day ≥ 90 °F April 22 1980
Latest freeze May 29 1965
Latest day ≥ 80 °F October 23 1963
Latest day ≥ 90 °F October 3 1997
Most days in a year < 0 °F 45 1963
Most days in a year < 32 °F 161 2018
Most days in a year ≥ 80 °F 95 1988
Most days in a year ≥ 90 °F 37 1988
Most days in a year ≥ 100 °F 4 1988
Dubuque Weather Streaks
Most consecutive days...
With precipitation 12 days Nov 8–19, 1985
Without precipitation 54 days Sep 23 – Nov 15, 1952
With snow 9 days Feb 3–11, 2018
High temperature at or
below freezing
52 days Dec 30, 1978 – Feb 19, 1979
High temperature ≥ 80 °F 41 days Aug 2 – Sep 11, 1947
High temperature ≥ 90 °F 12 days Jul 24 – Aug 4, 1941
Plant Hardiness Zone
5A
Dubuque is in plant hardiness zone 5A
based on average yearly minimum temperature from 1991–2020
Dubuque Weather by Year
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Weather Station Details
Years Station Coordinates
1951–2024 Dubuque Regional Airport location
1938–1950 Dubuque L&D 11 location