August weather in Washington, MO
The average temperature in Washington in August is 75.9°F (64.9°F–86.9°F). Average precipitation: 3.75 inches.
August is a summer month in Washington, and is warmer than the annual average of 54.8°F. Daily temperatures swing about 22°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 13h 30m. For travel, August is a comfortable month to visit.
Avg High
86.9°F
Avg Low
64.9°F
Precipitation
3.75 in
Daylight
13h 30m
August records in Washington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 102.0°F (2012) | 59.0°F (2009) | 2.52 in (2020) |
| August 2 | 98.1°F (2012) | 59.0°F (2009) | 0.80 in (2023) |
| August 3 | 102.9°F (2011) | 57.9°F (2014) | 0.88 in (2003) |
| August 4 | 99.0°F (2010) | 57.0°F (2021) | 3.95 in (2022) |
| August 5 | 98.1°F (2010) | 55.0°F (2017) | 3.04 in (2012) |
| August 6 | 96.1°F (2018) | 55.0°F (2017) | 3.42 in (2015) |
| August 7 | 98.1°F (2018) | 57.9°F (2020) | 3.47 in (1995) |
| August 8 | 96.1°F (2012) | 61.0°F (2017) | 2.90 in (1999) |
| August 9 | 96.1°F (2012) | 55.0°F (2017) | 2.00 in (2020) |
| August 10 | 96.1°F (2009) | 55.0°F (2024) | 0.96 in (2001) |
| August 11 | 99.0°F (2010) | 55.0°F (2024) | 1.03 in (2020) |
| August 12 | 98.1°F (2010) | 55.0°F (2024) | 1.60 in (1950) |
| August 13 | 96.1°F (2010) | 55.0°F (2017) | 3.54 in (1950) |
| August 14 | 99.0°F (2010) | 54.0°F (2013) | 1.38 in (2002) |
| August 15 | 96.1°F (2010) | 53.1°F (2013) | 2.61 in (2016) |
| August 16 | 96.1°F (2025) | 55.0°F (2013) | 0.96 in (2005) |
| August 17 | 100.0°F (2025) | 55.0°F (2013) | 1.70 in (2017) |
| August 18 | 98.1°F (2025) | 51.1°F (2012) | 0.67 in (1996) |
| August 19 | 97.0°F (2025) | 52.0°F (2012) | 1.55 in (2015) |
| August 20 | 96.1°F (2010) | 52.0°F (2012) | 3.50 in (1951) |
| August 21 | 100.0°F (2023) | 55.0°F (2012) | 2.04 in (2010) |
| August 22 | 93.9°F (2014) | 51.1°F (2024) | 0.89 in (2019) |
| August 23 | 97.0°F (2023) | 53.1°F (2018) | 0.17 in (2019) |
| August 24 | 95.0°F (2012) | 53.1°F (2015) | 2.43 in (2000) |
| August 25 | 98.1°F (2021) | 51.1°F (2015) | 1.03 in (2004) |
| August 26 | 99.0°F (2023) | 48.0°F (2025) | 3.22 in (2019) |
| August 27 | 97.0°F (2024) | 48.9°F (2025) | 2.54 in (2012) |
| August 28 | 99.0°F (2024) | 51.1°F (2025) | 0.99 in (2004) |
| August 29 | 96.1°F (2018) | 51.1°F (2025) | 0.83 in (2018) |
| August 30 | 96.1°F (2024) | 54.0°F (2025) | 1.25 in (1950) |
| August 31 | 97.0°F (2013) | 55.0°F (2023) | 2.27 in (2019) |