Pool season · Minnesota
St. Cloud Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
St. Cloud's whole pool calendar, condensed: when the water warms, when it cools, and where today falls between those edges. Use the opening guide and closing guide for the step-by-step work; keep this page for the dates.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is St. Cloud's swim season; the hollow teal run before it (May 9 to May 30) is when to open; the hollow amber run after is when to close, with September 22 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The St. Cloud pool calendar
Opening — target May 16
Target May 16; the practical window runs May 9–May 30, and the 7-day mean crosses the 61°F threshold around May 30. Cold-water starts are the cheap ones.
Closing — deadline September 22
Hold the cover until September 12, then winterize by September 22, a week ahead of the September 30 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. Cloud'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 14° | 13° | 23° | 37° | 51° | 62° | 69° | 69° | 64° | 53° | 38° | 24° |
The curve peaks near 70°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when St. Cloud hits the closing window
Data: NOAA 1991–2020 climate normals via St Cloud Regional Airport (5.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.