August weather in Mountlake Terrace, WA
The average temperature in Mountlake Terrace in August is 67.1°F (57.1°F–77.0°F). Average precipitation: 1.00 inches.
August is a summer month in Mountlake Terrace, and is warmer than the annual average of 53.2°F. Daily temperatures swing about 19.9°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 14h 6m. For travel, August is one of the best months of the year to visit.
Avg High
77.0°F
Avg Low
57.1°F
Precipitation
1.00 in
Daylight
14h 6m
August records in Mountlake Terrace
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 89.1°F (2015) | 50.0°F (2011) | 0.06 in (2008) |
| August 2 | 91.0°F (2009) | 52.0°F (1991) | 0.74 in (1996) |
| August 3 | 91.9°F (2017) | 52.0°F (2002) | 0.22 in (1999) |
| August 4 | 91.9°F (2017) | 52.0°F (2003) | 0.01 in (2022) |
| August 5 | 90.0°F (2012) | 53.1°F (2006) | 0.15 in (1999) |
| August 6 | 87.1°F (2013) | 54.0°F (1996) | 0.64 in (1995) |
| August 7 | 89.1°F (2018) | 53.1°F (1988) | 0.22 in (2025) |
| August 8 | 90.0°F (2018) | 51.1°F (2001) | 0.13 in (2007) |
| August 9 | 91.0°F (2004) | 51.1°F (1992) | 0.68 in (1991) |
| August 10 | 89.1°F (1996) | 55.0°F (1991) | 0.68 in (2019) |
| August 11 | 95.0°F (2014) | 53.1°F (1989) | 0.28 in (2009) |
| August 12 | 93.0°F (1990) | 48.9°F (2006) | 0.32 in (2014) |
| August 13 | 93.0°F (2021) | 51.1°F (1995) | 0.48 in (2014) |
| August 14 | 91.0°F (2010) | 48.9°F (1995) | 0.90 in (2015) |
| August 15 | 93.9°F (2023) | 51.1°F (2009) | 0.46 in (2025) |
| August 16 | 97.0°F (2020) | 51.1°F (2000) | 0.41 in (1995) |
| August 17 | 91.9°F (2023) | 46.9°F (2000) | 0.88 in (1995) |
| August 18 | 88.0°F (2022) | 53.1°F (1987) | 0.21 in (2000) |
| August 19 | 91.0°F (2016) | 51.1°F (2002) | 0.44 in (2008) |
| August 20 | 91.0°F (2016) | 50.0°F (2001) | 0.52 in (2008) |
| August 21 | 89.1°F (2018) | 50.0°F (2010) | 0.56 in (1989) |
| August 22 | 87.1°F (2018) | 52.0°F (1987) | 1.58 in (2004) |
| August 23 | 87.1°F (2025) | 50.0°F (1992) | 0.50 in (2024) |
| August 24 | 87.1°F (2022) | 48.9°F (2003) | 0.80 in (2008) |
| August 25 | 89.1°F (2022) | 50.0°F (1991) | 0.17 in (2008) |
| August 26 | 89.1°F (2014) | 48.9°F (2009) | 0.44 in (1997) |
| August 27 | 88.0°F (1994) | 51.1°F (1991) | 0.82 in (1991) |
| August 28 | 87.1°F (1988) | 50.0°F (2000) | 0.21 in (1991) |
| August 29 | 91.0°F (1996) | 50.0°F (1992) | 1.28 in (2015) |
| August 30 | 87.1°F (2022) | 51.1°F (2008) | 0.26 in (2014) |
| August 31 | 89.1°F (2022) | 48.9°F (2012) | 0.62 in (2010) |