July weather in SeaTac, WA
The average temperature in SeaTac in July is 67.1°F (56.8°F–77.4°F). Average precipitation: 0.60 inches.
July is a summer month in SeaTac, and is warmer than the annual average of 53.7°F. Daily temperatures swing about 20.6°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 15h 23m. For travel, July is one of the best months of the year to visit.
Avg High
77.4°F
Avg Low
56.8°F
Precipitation
0.60 in
Daylight
15h 23m
July records in SeaTac
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 93.9°F (2014) | 45.0°F (1948) | 0.75 in (1954) |
| July 2 | 93.0°F (2015) | 43.0°F (1954) | 0.50 in (1966) |
| July 3 | 91.9°F (2015) | 44.1°F (1954) | 0.47 in (1966) |
| July 4 | 91.9°F (2015) | 43.0°F (1949) | 0.57 in (1992) |
| July 5 | 91.0°F (1958) | 46.9°F (1951) | 0.64 in (1961) |
| July 6 | 93.9°F (1960) | 45.0°F (1949) | 0.44 in (1948) |
| July 7 | 93.0°F (2024) | 46.9°F (1955) | 0.58 in (2002) |
| July 8 | 95.0°F (2010) | 46.9°F (1950) | 0.80 in (1997) |
| July 9 | 98.1°F (2024) | 48.0°F (1960) | 0.81 in (1995) |
| July 10 | 89.1°F (2002) | 46.0°F (1960) | 0.38 in (1981) |
| July 11 | 98.1°F (2007) | 48.9°F (1960) | 0.25 in (1983) |
| July 12 | 97.0°F (1961) | 46.9°F (1954) | 0.64 in (1972) |
| July 13 | 93.0°F (1961) | 50.0°F (1948) | 0.85 in (1981) |
| July 14 | 91.0°F (1996) | 50.0°F (1982) | 0.74 in (1957) |
| July 15 | 93.0°F (2018) | 48.9°F (1982) | 0.11 in (1998) |
| July 16 | 98.1°F (1979) | 50.0°F (1953) | 0.65 in (2001) |
| July 17 | 96.1°F (1979) | 48.0°F (1950) | 0.35 in (1974) |
| July 18 | 93.0°F (1995) | 46.9°F (1952) | 0.29 in (2007) |
| July 19 | 95.0°F (1988) | 48.0°F (1962) | 0.45 in (1993) |
| July 20 | 100.0°F (1994) | 50.0°F (1953) | 0.60 in (2012) |
| July 21 | 97.0°F (2006) | 48.0°F (1951) | 0.29 in (2007) |
| July 22 | 96.1°F (2006) | 48.9°F (1954) | 0.33 in (1952) |
| July 23 | 99.0°F (1991) | 46.9°F (1955) | 0.76 in (2014) |
| July 24 | 95.0°F (2004) | 43.0°F (1953) | 0.28 in (1991) |
| July 25 | 93.9°F (1988) | 46.9°F (1954) | 0.40 in (1983) |
| July 26 | 93.9°F (2022) | 48.9°F (1952) | 0.73 in (1978) |
| July 27 | 95.0°F (1958) | 46.0°F (1956) | 0.30 in (1983) |
| July 28 | 97.0°F (1958) | 46.9°F (1953) | 0.22 in (1993) |
| July 29 | 102.9°F (2009) | 45.0°F (1954) | 0.17 in (1993) |
| July 30 | 96.1°F (2009) | 48.0°F (1951) | 0.39 in (1955) |
| July 31 | 95.0°F (2022) | 46.9°F (1954) | 0.26 in (1955) |