August weather in Dayton, OR
The average temperature in Dayton in August is 67.5°F (51.9°F–83.1°F). Average precipitation: 0.36 inches.
August is a summer month in Dayton, and is warmer than the annual average of 52.9°F. Daily temperatures swing about 31.2°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 13h 54m. For travel, August is a comfortable month to visit.
Avg High
83.1°F
Avg Low
51.9°F
Precipitation
0.36 in
Daylight
13h 54m
August records in Dayton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 102.9°F (2015) | 46.0°F (2002) | 0.00 in (1998) |
| August 2 | 106.0°F (2017) | 42.1°F (2002) | 0.00 in (1998) |
| August 3 | 102.0°F (2017) | 42.1°F (2002) | 0.00 in (1998) |
| August 4 | 102.0°F (2012) | 46.9°F (2003) | 0.27 in (2002) |
| August 5 | 95.0°F (2005) | 46.0°F (2002) | 0.28 in (2003) |
| August 6 | 95.0°F (2013) | 48.0°F (2002) | 0.13 in (2004) |
| August 7 | 99.0°F (2022) | 43.0°F (2002) | 0.32 in (1999) |
| August 8 | 97.0°F (2017) | 43.0°F (2025) | 0.26 in (2016) |
| August 9 | 99.0°F (2001) | 46.9°F (2020) | 0.04 in (2022) |
| August 10 | 100.9°F (2025) | 45.0°F (2009) | 0.16 in (2013) |
| August 11 | 102.0°F (2021) | 44.1°F (2002) | 0.39 in (2009) |
| August 12 | 102.9°F (2021) | 43.0°F (2006) | 0.10 in (2009) |
| August 13 | 102.9°F (2002) | 43.0°F (2020) | 0.19 in (2017) |
| August 14 | 107.1°F (2023) | 46.0°F (2017) | 0.03 in (1999) |
| August 15 | 102.0°F (2008) | 45.0°F (2000) | 0.13 in (2025) |
| August 16 | 102.9°F (2023) | 43.0°F (2000) | 0.06 in (2025) |
| August 17 | 96.1°F (2012) | 44.1°F (2018) | 0.40 in (2024) |
| August 18 | 102.0°F (2016) | 45.0°F (2002) | 0.05 in (2007) |
| August 19 | 102.0°F (2016) | 44.1°F (2023) | 0.39 in (2007) |
| August 20 | 99.0°F (2016) | 41.0°F (2010) | 0.29 in (2007) |
| August 21 | 93.0°F (2013) | 43.0°F (2010) | 0.20 in (2001) |
| August 22 | 100.9°F (2025) | 44.1°F (2002) | 0.84 in (2001) |
| August 23 | 100.0°F (2025) | 39.9°F (2021) | 0.43 in (2004) |
| August 24 | 95.0°F (2025) | 39.9°F (2009) | 0.27 in (2008) |
| August 25 | 96.1°F (2016) | 41.0°F (2018) | 0.30 in (2004) |
| August 26 | 98.1°F (2016) | 43.0°F (2009) | 0.23 in (2013) |
| August 27 | 99.0°F (2019) | 42.1°F (2000) | 0.01 in (2004) |
| August 28 | 98.1°F (2017) | 39.0°F (2000) | 0.10 in (2013) |
| August 29 | 95.0°F (2007) | 39.9°F (2010) | 0.34 in (2015) |
| August 30 | 95.0°F (2024) | 41.0°F (2008) | 0.31 in (2015) |
| August 31 | 100.0°F (1998) | 37.9°F (2008) | 0.72 in (2023) |