Pool season · Illinois
Peoria Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Peoria'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 Peoria's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 18–May 9 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 11. Wherever the today marker sits, the nearest color change is your next appointment.
The Peoria pool calendar
Opening — target April 25
Target April 25; the practical window runs April 18–May 9, and the 7-day mean crosses the 61°F threshold around May 9. Cold-water starts are the cheap ones.
Closing — deadline October 11
Hold the cover until October 1, then winterize by October 11, a week ahead of the October 23 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Peoria's typical-year water curve: the same EWMA model as the live widget, run on the 1991–2020 normals instead of this week's weather.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 27° | 27° | 36° | 48° | 59° | 69° | 76° | 76° | 72° | 61° | 48° | 36° |
The curve peaks near 76°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Peoria hits the closing window
Data: NOAA 1991–2020 climate normals via Peoria Gtr Peoria Airport (6.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.