Pool season · Arizona
Avondale Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Avondale pool. The season bar below draws everything the model knows — opening window, prime season, closing window — against today's date, with the working details one click away on the opening and closing pages.
Avondale, AZ — 226 swim days a yearEach dot on the bar is one week of Avondale's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (February 8–March 1), solid teal is swim season, and hollow amber is the closing window ending November 27. The black marker is today — its position against the colors is the entire executive summary.
The Avondale pool calendar
Opening — target February 15
Target February 15; the practical window runs February 8–March 1, and the 7-day mean crosses the 61°F threshold around March 1. Cold-water starts are the cheap ones.
Closing — deadline November 27
The window opens November 17 once water leaves the algae zone; the model deadline is November 27, a week ahead of the December 24 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Avondale'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 53° | 56° | 62° | 68° | 76° | 85° | 92° | 93° | 90° | 80° | 68° | 56° |
Warmest water typically June–October (peaking near 94°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Yuma's pool season and Buckeye's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Arizona season index.
Avondale pool season FAQ
When should I open my pool in Avondale, AZ?
Target February 15. That date backs off two weeks from the day Avondale's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Avondale opening guide.
When should I close my pool in Avondale?
The closing deadline is November 27 — late enough that the water has cooled out of the algae zone, early enough to beat Avondale's first-freeze normal by about a week. See the Avondale closing guide for the winterizing steps.
How long is the swim season in Avondale?
Avondale averages 226 days a year with normal highs of 80°F or better — about 10 days earlier than the Arizona median. The Arizona season index ranks all 20 covered cities by the same metric.
How warm does pool water get in Avondale?
An unheated pool near Avondale typically peaks around 94°F in high summer and bottoms out near 53°F in winter, spending roughly 5 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 Avondale hits the closing window
Data: NOAA 1991–2020 climate normals via Litchfield Park (8.1 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.