Hottest temperature ever recorded: 118F at Ice Harbor Dam on 5 August 1961.
Lowest temperature ever recorded: -48F at Mazama and Winthrop on 30 December 1968.
Most rain in 24 hours: 14.26" at Mt. Mitchell #2, 23-24 November 1986.
Most snow in 24 hours: 65" at Crystal Mountain on 24 February 1994.
Wettest year at a station: 185" at Wynoochee Oxbow in 1931.
Driest year at a station: 2.61" at Wahluke in 1930.
Most snowfall in 12 months: 1140" (95ft, U.S. record) at Mt Baker ski area, 1998-99.
Most rainy days in a row: 55 at Centralia, November 1996-February 1997.
Most dry days in a row: 140 at White Swan, April-September 1973.
Warmest year statewide: 1934 (50.9 F).
Coldest year statewide: 1955 (44.8 F).
Warmest (annual): Richland (average annual temperature 54.1F).
Warmest (month): Kennewick (average July max temperature 90.4F).
Coldest (annual): Mazama (average annual temperature 43.9F).
Coldest (month): Winthrop (average January min temperature 10.9F).
Wettest (annual): Forks (121.7")
Wettest (month): Aberdeen (average December precipitation: 21.9").
Driest (annual): Desert Aire/Priest Rapids Dam (6.84").
Driest (month): Desert Aire and Sunnyside (0.19").
*Source
