Pool season · Minnesota
St. Paul Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
St. Paul'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.
The bar compresses St. Paul's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the May 1–May 22 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends September 30. Wherever the today marker sits, the nearest color change is your next appointment.
The St. Paul pool calendar
Opening — target May 8
Target May 8; the practical window runs May 1–May 22, and the 7-day mean crosses the 61°F threshold around May 22. Cold-water starts are the cheap ones.
Closing — deadline September 30
Hold the cover until September 20, then winterize by September 30, a week ahead of the October 16 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. Paul'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 18° | 18° | 27° | 41° | 54° | 65° | 72° | 73° | 68° | 56° | 41° | 27° |
The curve peaks near 73°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when St. Paul hits the closing window
Data: NOAA 1991–2020 climate normals via St Paul Downtown Airport (2.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.