Pool season · Ohio
Parma Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Parma'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.
Each dot on the bar is one week of Parma's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (April 25–May 16), solid teal is swim season, and hollow amber is the closing window ending October 10. The black marker is today — its position against the colors is the entire executive summary.
The Parma pool calendar
Opening — target May 2
Open by May 2 — a two-week head start on the May 16 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 10
The window opens September 30 once water leaves the algae zone; the model deadline is October 10, a week ahead of the November 3 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Parma'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° | 29° | 35° | 45° | 57° | 67° | 74° | 74° | 70° | 61° | 49° | 39° |
The curve peaks near 74°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Parma hits the closing window
Data: NOAA 1991–2020 climate normals via Cleveland (7.1 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.