Quincy August Weather

Averages and records for weather in Quincy, Illinois in the month of August.
Typical Quincy August Weather
1991–2020
Average daily high 84.5 °F
Average daily low 64.5 °F
Average monthly precipitation 3.9 inches
Daily chance of precipitation 27.1%
Quincy August Weather Records
1901–2024
Highest temperature 111 °F August 9, 1934
Lowest temperature 42 °F August 28, 1986
Highest daily low 87 °F August 22, 1936
Lowest daily high 60 °F August 26, 1944
Hottest average high temperature 98.9 °F 1936
Coldest average high temperature 78.9 °F 1992
Most daily precipitation 5.6 inches August 25, 2004
Most monthly precipitation 10.8 inches 1970
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 85.3 65.7 103 52
August 2 85.1 65.5 105 52
August 3 85.0 65.4 105 50
August 4 84.9 65.2 105 52
August 5 84.8 65.1 108 52
August 6 84.7 64.9 106 51
August 7 84.6 64.8 105 51
August 8 84.6 64.8 110 49
August 9 84.6 64.7 111 52
August 10 84.5 64.6 108 53
August 11 84.5 64.6 105 50
August 12 84.5 64.6 105 48
August 13 84.6 64.7 105 44
August 14 84.7 64.7 104 49
August 15 84.6 64.7 103 46
August 16 84.5 64.6 108 49
August 17 84.3 64.4 106 52
August 18 84.2 64.3 104 50
August 19 84.2 64.2 106 46
August 20 84.2 64.1 104 42
August 21 84.1 63.9 102 44
August 22 84.0 63.8 103 50
August 23 83.9 63.6 103 48
August 24 83.8 63.4 109 46
August 25 83.6 63.1 105 46
August 26 83.4 62.9 105 46
August 27 83.2 62.7 100 48
August 28 83.2 62.5 101 42
August 29 83.1 62.4 103 43
August 30 82.9 62.2 106 46
August 31 82.7 61.9 100 45
Weather Station Details
Years Station Coordinates
1949–2024 Quincy Regional Airport location
1901–1948 Quincy location