Waterloo August Weather

Averages and records for weather in Waterloo, Iowa in the month of August.
Typical Waterloo August Weather
1991–2020
Average daily high 81.7 °F
Average daily low 59.7 °F
Average monthly precipitation 4.2 inches
Average monthly snow none
Daily chance of precipitation 28.4%
Daily chance of snow 0%
Waterloo August Weather Records
1895–2024
Highest temperature 110 °F August 18, 1936
Lowest temperature 33 °F August 20, 1950
Highest daily low 80 °F August 16, 1988
Lowest daily high 57 °F August 25, 1987
Hottest average high temperature 91.8 °F 1936
Coldest average high temperature 76.2 °F 1977
Most daily precipitation 4.9 inches August 20, 1966
Most monthly precipitation 10.5 inches 1998
Most daily snow none -
Most monthly snow none -
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
August 1 82.9 61.4 102 46
August 2 82.8 61.2 101 44
August 3 82.6 61.0 105 44
August 4 82.5 60.8 98 45
August 5 82.4 60.6 104 44
August 6 82.3 60.4 99 45
August 7 82.2 60.4 99 46
August 8 82.2 60.3 100 43
August 9 82.1 60.2 102 41
August 10 82.0 60.1 97 44
August 11 82.0 60.1 98 43
August 12 82.0 60.0 102 45
August 13 82.0 60.0 97 41
August 14 82.0 60.0 101 39
August 15 81.8 59.9 104 42
August 16 81.7 59.8 105 43
August 17 81.6 59.6 105 46
August 18 81.4 59.4 110 43
August 19 81.5 59.3 100 42
August 20 81.5 59.2 100 33
August 21 81.4 59.0 101 39
August 22 81.3 58.8 100 40
August 23 81.3 58.6 105 43
August 24 81.1 58.4 103 41
August 25 80.9 58.1 98 39
August 26 80.7 57.9 97 40
August 27 80.6 57.7 96 41
August 28 80.5 57.4 98 39
August 29 80.4 57.3 98 37
August 30 80.3 57.1 96 34
August 31 80.0 56.8 99 36
Weather Station Details
Years Station Coordinates
1950–2024 Waterloo Municipal Airport location
1895–1950 Waterloo location