By Jacob Genuise
ENSO-neutral conditions are very likely (74% chance) to continue through the summer according to the Climate Prediction Center (CPC). Neutral conditions typically do not play a large role in determining our average summer weather so the outlooks elaborated on below are determined mostly from seasonal forecast models.
The 1-month outlook from the CPC for June 2025 indicates increased chances of below normal precipitation across eastern Washington (40-50%) and to a lesser extent, western Washington (33-40%). June temperatures are expected to be above normal statewide. The highest chances of above-normal temperatures exist across southeastern Washington (50-60%) near Walla Walla, Pomeroy, and Pullman with slightly less confidence in above normal temperatures across northwestern Washington (33-40%) including the Olympic Peninsula and Puget Sound.
1-month (June) outlook for precipitation (left) and temperature (right) in Washington State.
Regarding the 3-Month outlook (June-July-August), the overall weather is most likely to be drier and warmer than normal through the summer. There is a 40-50% chance that precipitation will be below normal statewide. Temperature shows a similar pattern to the 1-month outlook with the highest chance (50-60%) of above normal temperatures across southeastern Washington while the rest of the state has a 40-50% chance of above normal temperatures. These outlooks intensify drought concerns due to earlier than normal snowmelt for major river basins through June and increased water and electricity demands through the summer months.
3-month summer (June-August) outlook for precipitation (left) and temperature (right) in Washington State.