August weather in Monticello, IA
The average temperature in Monticello in August is °F (°F–°F). Average precipitation: 4.53 inches.
August is a summer month in Monticello, and is cooler than the annual average of 0°F. Daylight averages about 13h 43m.
Avg High
°F
Avg Low
°F
Precipitation
4.53 in
Daylight
13h 43m
August records in Monticello
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | — | — | 0.16 in (2024) |
| August 2 | — | — | 0.31 in (2018) |
| August 3 | — | — | 0.05 in (2023) |
| August 4 | — | — | 0.21 in (2017) |
| August 5 | — | — | 1.68 in (2012) |
| August 6 | — | — | 3.91 in (2018) |
| August 7 | — | — | 3.57 in (2022) |
| August 8 | — | — | 1.25 in (2018) |
| August 9 | — | — | 0.71 in (2015) |
| August 10 | — | — | 0.68 in (2025) |
| August 11 | — | — | 2.55 in (2025) |
| August 12 | — | — | 2.73 in (2016) |
| August 13 | — | — | 1.03 in (2019) |
| August 14 | — | — | 0.80 in (2023) |
| August 15 | — | — | 0.93 in (2024) |
| August 16 | — | — | 1.70 in (2025) |
| August 17 | — | — | 0.19 in (2018) |
| August 18 | — | — | 1.34 in (2019) |
| August 19 | — | — | 0.49 in (2015) |
| August 20 | — | — | 0.58 in (2022) |
| August 21 | — | — | 1.75 in (2018) |
| August 22 | — | — | 1.14 in (2013) |
| August 23 | — | — | 0.16 in (2013) |
| August 24 | — | — | 1.58 in (2014) |
| August 25 | — | — | 1.40 in (2022) |
| August 26 | — | — | 2.34 in (2012) |
| August 27 | — | — | 0.94 in (2016) |
| August 28 | — | — | 0.14 in (2018) |
| August 29 | — | — | 2.10 in (2018) |
| August 30 | — | — | 1.85 in (2024) |
| August 31 | — | — | 0.04 in (2014) |