Pool season · Utah
St. George Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one St. George pool. The season bar below draws everything the model knows — opening window, prime season, closing window — against today's date, with the working details one click away on the opening and closing pages.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is St. George's swim season; the hollow teal run before it (March 29 to April 19) is when to open; the hollow amber run after is when to close, with October 30 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The St. George pool calendar
Opening — target April 5
Target April 5; the practical window runs March 29–April 19, and the 7-day mean crosses the 61°F threshold around April 19. Cold-water starts are the cheap ones.
Closing — deadline October 30
Hold the cover until October 20, then winterize by October 30, a week ahead of the November 10 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on St. George'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 40° | 43° | 50° | 57° | 66° | 76° | 85° | 87° | 81° | 70° | 56° | 44° |
Warmest water typically July–September (peaking near 87°F); heaters and covers shift any month up.
Email me when St. George hits the closing window
Data: NOAA 1991–2020 climate normals via St George (3.4 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.