August weather in Waterbury, CT
The average temperature in Waterbury in August is °F (°F–°F). Average precipitation: 4.39 inches.
August is a summer month in Waterbury, and is cooler than the annual average of 0°F. Daylight averages about 13h 40m.
Avg High
°F
Avg Low
°F
Precipitation
4.39 in
Daylight
13h 40m
August records in Waterbury
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 90.0°F (2017) | 54.0°F (2014) | 1.33 in (2025) |
| August 2 | 91.0°F (2011) | 54.0°F (2014) | 0.76 in (2012) |
| August 3 | 90.0°F (2017) | 55.0°F (2011) | 0.60 in (2018) |
| August 4 | 91.0°F (2012) | 52.0°F (2016) | 1.15 in (2018) |
| August 5 | 91.0°F (2012) | 52.0°F (2013) | 0.94 in (2024) |
| August 6 | 91.0°F (2012) | 48.0°F (2013) | 1.46 in (2012) |
| August 7 | 91.0°F (2016) | 48.0°F (2013) | 1.50 in (2011) |
| August 8 | 88.0°F (2011) | 50.0°F (2014) | 1.00 in (2023) |
| August 9 | 90.0°F (2011) | 52.0°F (2014) | 1.49 in (2018) |
| August 10 | 91.0°F (2012) | 54.0°F (2014) | 1.92 in (2013) |
| August 11 | 91.0°F (2012) | 50.0°F (2013) | 0.81 in (2012) |
| August 12 | 95.0°F (2016) | 50.0°F (2011) | 0.98 in (2015) |
| August 13 | 97.0°F (2016) | 52.0°F (2011) | 1.00 in (2023) |
| August 14 | 99.0°F (2016) | 52.0°F (2013) | 1.42 in (2014) |
| August 15 | 95.0°F (2016) | 46.0°F (2013) | 4.66 in (2011) |
| August 16 | 90.0°F (2015) | 48.0°F (2013) | 0.37 in (2011) |
| August 17 | 91.0°F (2016) | 50.0°F (2013) | 0.11 in (2020) |
| August 18 | 93.0°F (2015) | 54.0°F (2013) | 0.72 in (2023) |
| August 19 | 93.0°F (2015) | 48.0°F (2012) | 3.21 in (2024) |
| August 20 | 90.0°F (2015) | 48.0°F (2014) | 0.54 in (2011) |
| August 21 | 88.0°F (2015) | 48.0°F (2014) | 2.11 in (2025) |
| August 22 | 88.0°F (2015) | 54.0°F (2012) | 2.12 in (2019) |
| August 23 | 84.0°F (2012) | 46.0°F (2016) | 1.70 in (2021) |
| August 24 | 86.0°F (2012) | 48.0°F (2016) | 1.55 in (2022) |
| August 25 | 86.0°F (2012) | 46.0°F (2013) | 0.50 in (2023) |
| August 26 | 90.0°F (2015) | 50.0°F (2013) | 0.19 in (2015) |
| August 27 | 90.0°F (2016) | 52.0°F (2015) | 0.84 in (2013) |
| August 28 | 90.0°F (2016) | 52.0°F (2015) | 7.14 in (2011) |
| August 29 | 90.0°F (2016) | 48.0°F (2015) | 2.17 in (2011) |
| August 30 | 86.0°F (2016) | 45.0°F (2012) | 0.50 in (2020) |
| August 31 | 88.0°F (2015) | 45.0°F (2012) | 0.16 in (2022) |