Pool season · Washington
Spokane Valley Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
This is the one-page view of Spokane Valley's pool year: both model windows, the estimated water-temperature curve, and today's live position on the season bar. The detailed checklists live on the opening and closing guides; this page is the calendar you check between them.
Each dot on the bar is one week of Spokane Valley's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (May 16–June 6), solid teal is swim season, and hollow amber is the closing window ending September 27. The black marker is today — its position against the colors is the entire executive summary.
The Spokane Valley pool calendar
Opening — target May 23
Open by May 23 — a two-week head start on the June 6 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline September 27
The window opens September 17 once water leaves the algae zone; the model deadline is September 27, a week ahead of the October 15 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Spokane Valley's own normals — the shape of a typical year, not a forecast. The widget above shows where the current year actually sits.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 31° | 33° | 38° | 45° | 53° | 60° | 68° | 72° | 66° | 55° | 43° | 34° |
The curve peaks near 73°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Spokane Valley hits the closing window
Data: NOAA 1991–2020 climate normals via Spokane Felts Field (4.3 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.