August weather in Renton, WA
The average temperature in Renton in August is 67.5°F (57.4°F–77.6°F). Average precipitation: 0.89 inches.
August is a summer month in Renton, and is warmer than the annual average of 53.6°F. Daily temperatures swing about 20.2°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 14h 4m. For travel, August is one of the best months of the year to visit.
Avg High
77.6°F
Avg Low
57.4°F
Precipitation
0.89 in
Daylight
14h 4m
August records in Renton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 91.0°F (2015) | 50.0°F (2002) | 0.11 in (2008) |
| August 2 | 91.0°F (2009) | 52.0°F (2005) | 0.28 in (2019) |
| August 3 | 91.9°F (2017) | 50.0°F (2002) | 0.32 in (1999) |
| August 4 | 93.9°F (2017) | 54.0°F (2007) | 0.00 in (1999) |
| August 5 | 93.0°F (2012) | 52.0°F (2006) | 0.14 in (1999) |
| August 6 | 87.1°F (2018) | 54.0°F (2002) | 0.49 in (2004) |
| August 7 | 90.0°F (2018) | 52.0°F (2002) | 0.26 in (1999) |
| August 8 | 93.0°F (2018) | 52.0°F (2002) | 0.04 in (2021) |
| August 9 | 91.9°F (2004) | 51.1°F (2020) | 0.30 in (2008) |
| August 10 | 89.1°F (2025) | 55.0°F (2020) | 0.23 in (2019) |
| August 11 | 93.0°F (2014) | 50.0°F (2007) | 0.03 in (2018) |
| August 12 | 93.0°F (2021) | 50.0°F (2000) | 0.44 in (2014) |
| August 13 | 93.0°F (2021) | 50.0°F (2020) | 0.50 in (2014) |
| August 14 | 93.0°F (2010) | 51.1°F (2000) | 0.76 in (2015) |
| August 15 | 93.9°F (2023) | 52.0°F (2000) | 0.22 in (2025) |
| August 16 | 98.1°F (2020) | 50.0°F (2000) | 0.00 in (1999) |
| August 17 | 93.0°F (2023) | 51.1°F (2000) | 0.51 in (2024) |
| August 18 | 87.1°F (2016) | 52.0°F (2002) | 0.32 in (2000) |
| August 19 | 93.0°F (2016) | 53.1°F (2002) | 0.53 in (2008) |
| August 20 | 91.9°F (2016) | 51.1°F (2001) | 0.69 in (2008) |
| August 21 | 89.1°F (2018) | 52.0°F (2000) | 0.51 in (2001) |
| August 22 | 89.1°F (2018) | 52.0°F (2015) | 0.78 in (2001) |
| August 23 | 90.0°F (2025) | 51.1°F (2003) | 0.32 in (2024) |
| August 24 | 89.1°F (2025) | 46.9°F (2003) | 1.02 in (2008) |
| August 25 | 91.0°F (2022) | 51.1°F (2001) | 0.45 in (2008) |
| August 26 | 91.0°F (2016) | 52.0°F (2009) | 0.51 in (2007) |
| August 27 | 90.0°F (2009) | 51.1°F (2009) | 0.14 in (2024) |
| August 28 | 88.0°F (2002) | 48.0°F (2000) | 0.25 in (2013) |
| August 29 | 88.0°F (2017) | 48.9°F (2010) | 1.00 in (2015) |
| August 30 | 88.0°F (2022) | 50.0°F (2020) | 0.29 in (2014) |
| August 31 | 88.0°F (2022) | 48.0°F (2006) | 0.42 in (2010) |