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Waterloo Weather Records

Waterloo, Iowa Weather averages and records from 1895–2022 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Waterloo, Iowa was 112 °F which occurred on July 14, 1936.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Waterloo, Iowa was -34 °F which occurred on January 16, 2009.
Lowest Temperatures: All-Time By Year
Waterloo Weather by Month
Averages based on the years 1991–2020
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
☀️ Average high (°F) 27.1 31.5 45.3 59.8 71.6 81.1 83.9 81.7 75.7 61.8 46.0 32.6 58.3
🌙 Average low (°F) 9.4 13.9 25.7 36.6 48.9 59.5 62.7 59.7 51.1 38.9 26.4 15.8 37.5
☀️ Record high (°F) 65 71 87 100 108 107 112 110 102 95 83 74 112
🌙 Record low (°F) -34 -31 -34 -4 22 33 42 33 19 0 -17 -29 -34
💧 Average precipitation (inches) 1.1 1.1 2.0 4.0 4.6 5.7 4.3 4.2 3.1 2.8 1.9 1.4 36.3
❄️ Average snow (inches) 10.1 9.3 4.6 1.7 0.1 0.0 0.0 0.0 0.0 0.3 3.1 9.9 39.1
More Waterloo Weather Records
1895–2022
Highest daily low 80 °F August 16, 1988
Lowest daily high -16 °F February 2, 1996
Greatest daily range
(Difference of high and low)
59 °F January 18, 1996
Difference in high temperature
over two conscutive days
52 °F Jan 18–19, 1996
Most daily precipitation 5.5 inches July 2, 1999
Most monthly precipitation 13.3 inches September 2018
Most yearly precipitation 54.2 inches 2018
Earliest freeze September 13 1975
Latest freeze May 29 1965
Earliest snow in season October 14 2018
Latest snow in season May 29 1947
Most daily snow 13.2 inches January 3, 1971
Most monthly snow 33.8 inches December 2000
Most yearly snow 64.9 inches 2019
Most days in a year ≥ 80 °F 113 1922
Most days in a year ≥ 90 °F 60 1936
Most days in a year ≥ 100 °F 20 1936
Waterloo Weather Streaks
Most consecutive days...
With precipitation 10 days May 16–25, 1902
Without precipitation 56 days Sep 22 – Nov 16, 1952
With snow 7 days Feb 5–11, 2018
Freezing temperatures
High temperature ≤ 32 °F
52 days Dec 30, 1978 – Feb 19, 1979
High temperature ≥ 80 °F 67 days Jun 23 – Aug 28, 1936
High temperature ≥ 90 °F 21 days Jun 28 – Jul 18, 1921
High temperature ≥ 100 °F 13 days Jul 5–17, 1936
Waterloo Weather by Year
More
Weather Station Details
Years Station Coordinates
1950–2022 Waterloo Municipal Airport location
1895–1950 Waterloo location