August weather in Union Gap, WA
The average temperature in Union Gap in August is 70.9°F (53.3°F–88.5°F). Average precipitation: 0.21 inches.
August is a summer month in Union Gap, and is warmer than the annual average of 50.8°F. Daily temperatures swing about 35.2°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 14h 0m. For travel, August is hot.
Avg High
88.5°F
Avg Low
53.3°F
Precipitation
0.21 in
Daylight
14h 0m
August records in Union Gap
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 105.1°F (1971) | 39.9°F (1987) | 0.17 in (1964) |
| August 2 | 105.1°F (2024) | 39.0°F (1956) | 0.30 in (1949) |
| August 3 | 102.9°F (1961) | 43.0°F (1996) | 0.15 in (1962) |
| August 4 | 108.0°F (1961) | 41.0°F (1954) | 0.53 in (1977) |
| August 5 | 102.0°F (1990) | 39.9°F (1969) | 0.14 in (2004) |
| August 6 | 105.1°F (1972) | 37.9°F (2002) | 0.24 in (1953) |
| August 7 | 106.0°F (1972) | 41.0°F (2002) | 0.28 in (2003) |
| August 8 | 106.0°F (1972) | 41.0°F (1992) | 0.09 in (2008) |
| August 9 | 108.0°F (1971) | 43.0°F (1985) | 0.32 in (1982) |
| August 10 | 109.9°F (1971) | 41.0°F (1947) | 0.57 in (2019) |
| August 11 | 108.0°F (1971) | 43.0°F (1957) | 0.09 in (2019) |
| August 12 | 104.0°F (1971) | 44.1°F (1957) | 0.09 in (2017) |
| August 13 | 102.9°F (1977) | 39.0°F (1995) | 0.12 in (2017) |
| August 14 | 102.0°F (1992) | 41.0°F (2009) | 0.25 in (1999) |
| August 15 | 105.1°F (2023) | 42.1°F (2009) | 0.52 in (1972) |
| August 16 | 104.0°F (2023) | 39.9°F (1978) | 0.08 in (1968) |
| August 17 | 102.9°F (2008) | 41.0°F (1976) | 0.15 in (2024) |
| August 18 | 102.9°F (1977) | 37.9°F (1995) | 1.40 in (1975) |
| August 19 | 99.0°F (1967) | 37.9°F (1947) | 0.23 in (1953) |
| August 20 | 100.9°F (2009) | 41.0°F (2000) | 0.16 in (1993) |
| August 21 | 100.0°F (1958) | 39.9°F (1985) | 1.64 in (1990) |
| August 22 | 99.0°F (1956) | 35.1°F (1960) | 0.51 in (2004) |
| August 23 | 98.1°F (1958) | 37.9°F (1992) | 0.38 in (1989) |
| August 24 | 100.0°F (1958) | 37.0°F (1993) | 0.56 in (1968) |
| August 25 | 100.0°F (1996) | 36.0°F (1993) | 0.16 in (2008) |
| August 26 | 98.1°F (2025) | 37.9°F (1955) | 0.55 in (1968) |
| August 27 | 100.0°F (1972) | 39.0°F (1960) | 0.40 in (1975) |
| August 28 | 102.0°F (1972) | 37.0°F (1980) | 0.17 in (1975) |
| August 29 | 99.0°F (2017) | 36.0°F (1980) | 0.27 in (1983) |
| August 30 | 98.1°F (1967) | 37.9°F (1964) | 0.31 in (1977) |
| August 31 | 98.1°F (2022) | 37.0°F (1999) | 0.10 in (1999) |