Pool season · Arizona
Peoria Pool Season: the Year on One Bar
Last updated: July 25, 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.
Peoria, AZ — 210 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Peoria's swim season; the hollow teal run before it (February 27 to March 20) is when to open; the hollow amber run after is when to close, with November 22 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Peoria pool calendar
Opening — target March 6
Target March 6; the practical window runs February 27–March 20, and the 7-day mean crosses the 61°F threshold around March 20. Cold-water starts are the cheap ones.
Closing — deadline November 22
Hold the cover until November 12, then winterize by November 22, a week ahead of the December 11 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Peoria'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 52° | 53° | 58° | 63° | 71° | 81° | 89° | 91° | 88° | 78° | 66° | 54° |
Warmest water typically June–October (peaking near 91°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Mesa's pool season and Phoenix's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Arizona season index.
Peoria pool season FAQ
When should I open my pool in Peoria, AZ?
Target March 6. That date backs off two weeks from the day Peoria's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Peoria opening guide.
When should I close my pool in Peoria?
The closing deadline is November 22 — late enough that the water has cooled out of the algae zone, early enough to beat Peoria's first-freeze normal by about a week. See the Peoria closing guide for the winterizing steps.
How long is the swim season in Peoria?
Peoria averages 210 days a year with normal highs of 80°F or better — about 9 days later than the Arizona median. The Arizona season index ranks all 20 covered cities by the same metric.
How warm does pool water get in Peoria?
An unheated pool near Peoria typically peaks around 91°F in high summer and bottoms out near 51°F in winter, spending roughly 4 months at or above the 78°F comfort line most swimmers prefer. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Peoria hits the closing window
Data: NOAA 1991–2020 climate normals via Wittmann 1se (12.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.