July weather in Mattawa, WA
The average temperature in Mattawa in July is 79.0°F (66.5°F–91.6°F). Average precipitation: 0.21 inches.
July is a summer month in Mattawa, and is warmer than the annual average of 56°F. Daily temperatures swing about 25.1°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 15h 18m. For travel, July is hot.
Avg High
91.6°F
Avg Low
66.5°F
Precipitation
0.21 in
Daylight
15h 18m
July records in Mattawa
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 113.0°F (2021) | 46.9°F (1991) | 0.20 in (1966) |
| July 2 | 106.0°F (2013) | 48.9°F (1979) | 0.45 in (1966) |
| July 3 | 102.9°F (1968) | 53.1°F (1986) | 0.55 in (1965) |
| July 4 | 106.0°F (1970) | 48.0°F (1978) | 0.05 in (1986) |
| July 5 | 116.1°F (2015) | 48.9°F (1963) | 0.21 in (1981) |
| July 6 | 116.1°F (2015) | 46.9°F (1971) | 0.05 in (1966) |
| July 7 | 106.0°F (2007) | 52.0°F (1971) | 0.26 in (1963) |
| July 8 | 107.1°F (2024) | 51.1°F (1981) | 0.12 in (2002) |
| July 9 | 111.0°F (1975) | 54.0°F (1972) | 0.03 in (2012) |
| July 10 | 105.1°F (1975) | 53.1°F (1971) | 0.17 in (2023) |
| July 11 | 108.0°F (2002) | 50.0°F (1995) | 0.06 in (1965) |
| July 12 | 109.0°F (1990) | 53.1°F (1988) | 0.02 in (2011) |
| July 13 | 109.0°F (1961) | 55.0°F (1988) | 0.11 in (2007) |
| July 14 | 106.0°F (1996) | 54.0°F (1967) | 0.07 in (1957) |
| July 15 | 106.0°F (1990) | 50.0°F (1982) | 0.00 in (1957) |
| July 16 | 109.0°F (2014) | 52.0°F (1957) | 0.10 in (2012) |
| July 17 | 109.9°F (1960) | 54.0°F (1982) | 0.97 in (1993) |
| July 18 | 111.9°F (1960) | 46.9°F (1996) | 0.98 in (1987) |
| July 19 | 109.9°F (1979) | 50.0°F (1996) | 0.20 in (1974) |
| July 20 | 109.9°F (1959) | 57.0°F (1972) | 0.90 in (2012) |
| July 21 | 109.9°F (1959) | 55.0°F (1970) | 0.00 in (1957) |
| July 22 | 107.1°F (1994) | 53.1°F (1957) | 0.18 in (2005) |
| July 23 | 111.9°F (2006) | 57.9°F (1963) | 0.63 in (1992) |
| July 24 | 108.0°F (1994) | 57.9°F (2012) | 0.09 in (2019) |
| July 25 | 106.0°F (1962) | 55.9°F (1966) | 0.33 in (1983) |
| July 26 | 109.0°F (1998) | 50.0°F (1993) | 0.03 in (1991) |
| July 27 | 111.9°F (1998) | 53.1°F (1963) | 0.01 in (1983) |
| July 28 | 107.1°F (1968) | 55.0°F (1959) | 0.00 in (1957) |
| July 29 | 111.0°F (2022) | 48.9°F (1963) | 0.06 in (1993) |
| July 30 | 111.0°F (2022) | 53.1°F (1987) | 0.27 in (1958) |
| July 31 | 109.0°F (2022) | 52.0°F (2008) | 0.25 in (1998) |