August weather in Federal Way, WA
The average temperature in Federal Way in August is 66.9°F (57.0°F–76.9°F). Average precipitation: 0.83 inches.
August is a summer month in Federal Way, and is warmer than the annual average of 53.7°F. Daily temperatures swing about 19.9°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 14h 3m. For travel, August is one of the best months of the year to visit.
Avg High
76.9°F
Avg Low
57.0°F
Precipitation
0.83 in
Daylight
14h 3m
August records in Federal Way
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 90.0°F (2015) | 48.9°F (1987) | 0.39 in (2008) |
| August 2 | 87.1°F (2009) | 42.1°F (2007) | 0.27 in (1996) |
| August 3 | 87.1°F (2017) | 48.9°F (2005) | 0.10 in (1999) |
| August 4 | 89.1°F (1993) | 51.1°F (1983) | 0.12 in (1989) |
| August 5 | 88.0°F (2012) | 43.0°F (1982) | 0.02 in (1984) |
| August 6 | 89.1°F (2012) | 50.0°F (1984) | 0.66 in (1992) |
| August 7 | 89.1°F (1986) | 51.1°F (1984) | 0.31 in (1985) |
| August 8 | 90.0°F (1986) | 50.0°F (1998) | 0.42 in (1985) |
| August 9 | 89.1°F (1986) | 50.0°F (1992) | 0.79 in (1991) |
| August 10 | 90.0°F (1986) | 51.1°F (1989) | 0.68 in (1991) |
| August 11 | 88.0°F (2001) | 48.9°F (1989) | 0.31 in (2009) |
| August 12 | 91.0°F (2025) | 48.9°F (1985) | 0.20 in (2009) |
| August 13 | 91.9°F (1992) | 48.9°F (1984) | 1.15 in (2014) |
| August 14 | 91.0°F (1992) | 48.9°F (1995) | 0.41 in (2015) |
| August 15 | 90.0°F (2023) | 43.0°F (1982) | 0.57 in (2025) |
| August 16 | 96.1°F (2020) | 41.0°F (2007) | 0.20 in (1988) |
| August 17 | 90.0°F (2023) | 27.0°F (2007) | 0.68 in (1995) |
| August 18 | 90.0°F (1991) | 42.1°F (1982) | 0.25 in (2024) |
| August 19 | 89.1°F (2016) | 46.9°F (1998) | 0.02 in (2022) |
| August 20 | 86.0°F (2016) | 46.0°F (1984) | 0.66 in (2008) |
| August 21 | 88.0°F (1986) | 46.0°F (1987) | 0.22 in (2020) |
| August 22 | 88.0°F (1986) | 46.0°F (1985) | 1.04 in (2001) |
| August 23 | 84.9°F (1985) | 42.1°F (2003) | 0.75 in (2001) |
| August 24 | 87.1°F (1982) | 48.9°F (1992) | 0.44 in (2004) |
| August 25 | 91.0°F (1982) | 44.1°F (1985) | 0.73 in (2004) |
| August 26 | 90.0°F (2016) | 45.0°F (1993) | 0.42 in (1997) |
| August 27 | 89.1°F (1986) | 48.0°F (1991) | 0.55 in (1991) |
| August 28 | 84.9°F (2009) | 43.0°F (1984) | 0.26 in (2013) |
| August 29 | 86.0°F (2002) | 45.0°F (1984) | 0.40 in (2015) |
| August 30 | 93.0°F (1996) | 41.0°F (1984) | 1.48 in (1983) |
| August 31 | 84.9°F (2022) | 45.0°F (1984) | 0.39 in (1991) |