Weather history and climate summary information is available for the following locations:
- Bellingham
- Grant County Airport
- Seattle
- Spokane
- Tacoma
- Walla Walla
- Yakima
Warmest July Days
The warmest July days in Washington are:
| Walla Walla, Washington | 1975 | 111.9°F |
| Walla Walla, Washington | 1994 | 111.9°F |
| Grant County Airport, Washington | 1984 | 111°F |
| Walla Walla, Washington | 1990 | 109.9°F |
| Walla Walla, Washington | 2002 | 109.9°F |
Coldest July Days
The coldest July days in Washington were:
| Yakima, Washington | 1979 | 34.9°F |
| Yakima, Washington | 1988 | 36°F |
| Spokane, Washington | 1981 | 36.9°F |
| Yakima, Washington | 1999 | 37°F |
| Spokane, Washington | 1962 | 37.9°F |
Wettest July Days
The wettest single days in July occurred:
| Walla Walla, Washington | 1992 | 3.5 inches |
| Tacoma, Washington | 1995 | 1.5 inches |
| Spokane, Washington | 1990 | 1.5 inches |
| Bellingham, Washington | 1992 | 1.3 inches |
| Bellingham, Washington | 1993 | 1.3 inches |