Updated November 15, 2022
As the state's lead agency for water supplies, we pay close attention to multiple data sources and monitor them closely. The Office of the Washington State Climatologist serves as a credible and expert source of climate and weather information for the state. Their monthly newsletter reviews the previous month’s data and provides an outlook for the coming weeks.
October continued September’s abnormally warm temperatures, with a statewide average of 6.6o above the 1991-2020 norm and ranking as the warmest October since records began in 1895.
Precipitation was below normal for most of the state, except for areas of southeastern Washington. In general, typical fall temperatures and precipitation finally showed up on October 21.
The warm dry weather contributed to continued wildfire activity, with poor air quality in much of the state prior to the late month rainfall. Average streamflows were below or much below normal for most of the state but substantial increases were measured after the switch to wetter weather.
The latest November edition of the U.S. Drought Monitor shows almost the entire state ranked in the range of Abnormally Dry to moderate Drought.
Find details, including many daily high temperature records from around the state, as well as a climate summary and outlook in the November issue of the State Climatologist’s Newsletter.