August weather in Prosser, WA
The average temperature in Prosser in August is 73.4°F (57.7°F–89.2°F). Average precipitation: 0.16 inches.
August is a summer month in Prosser, and is warmer than the annual average of 53°F. Daily temperatures swing about 31.5°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 13h 59m. For travel, August is hot.
Avg High
89.2°F
Avg Low
57.7°F
Precipitation
0.16 in
Daylight
13h 59m
August records in Prosser
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 105.1°F (1971) | 44.1°F (1937) | 0.27 in (1998) |
| August 2 | 106.0°F (2009) | 37.0°F (2010) | 0.20 in (1976) |
| August 3 | 106.0°F (2009) | 44.1°F (1950) | 0.61 in (1934) |
| August 4 | 102.0°F (1998) | 42.1°F (1950) | 0.18 in (1962) |
| August 5 | 106.0°F (1998) | 41.0°F (1948) | 0.51 in (2004) |
| August 6 | 104.0°F (1998) | 41.0°F (1969) | 0.02 in (1962) |
| August 7 | 102.9°F (2012) | 42.1°F (1938) | 0.47 in (2003) |
| August 8 | 104.0°F (2019) | 42.1°F (1938) | 0.21 in (1953) |
| August 9 | 102.9°F (2018) | 39.0°F (2010) | 0.32 in (1989) |
| August 10 | 102.9°F (2018) | 43.0°F (1947) | 0.17 in (1982) |
| August 11 | 102.9°F (1971) | 45.0°F (1932) | 0.45 in (2019) |
| August 12 | 102.9°F (2021) | 41.0°F (1927) | 0.22 in (1941) |
| August 13 | 102.9°F (2001) | 39.9°F (1949) | 0.10 in (2017) |
| August 14 | 102.9°F (2001) | 41.0°F (1937) | 0.31 in (2014) |
| August 15 | 102.0°F (1933) | 39.9°F (1937) | 0.20 in (1978) |
| August 16 | 105.1°F (2023) | 41.0°F (1935) | 0.18 in (1978) |
| August 17 | 105.1°F (2023) | 41.0°F (1973) | 0.03 in (1993) |
| August 18 | 102.0°F (1967) | 39.0°F (1973) | 0.57 in (1975) |
| August 19 | 102.9°F (1942) | 39.0°F (2000) | 0.16 in (2007) |
| August 20 | 100.9°F (1977) | 36.0°F (2000) | 0.15 in (2007) |
| August 21 | 102.0°F (2009) | 39.9°F (1947) | 0.78 in (1990) |
| August 22 | 102.0°F (2009) | 37.0°F (1960) | 0.54 in (2004) |
| August 23 | 99.0°F (1930) | 42.1°F (1943) | 0.46 in (1989) |
| August 24 | 99.0°F (1926) | 39.0°F (2001) | 0.66 in (1977) |
| August 25 | 100.0°F (1958) | 37.9°F (1993) | 0.25 in (2004) |
| August 26 | 97.0°F (1958) | 39.9°F (1976) | 0.29 in (1941) |
| August 27 | 97.0°F (1929) | 37.9°F (1960) | 0.21 in (1968) |
| August 28 | 98.1°F (1999) | 37.9°F (1980) | 0.20 in (1983) |
| August 29 | 100.9°F (2023) | 37.0°F (1969) | 0.19 in (1951) |
| August 30 | 100.0°F (1998) | 39.9°F (1927) | 0.91 in (1947) |
| August 31 | 100.9°F (1986) | 39.0°F (1973) | 0.46 in (1961) |