Pool season · Arizona
Yuma Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Yuma'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.
Yuma, AZ — 241 swim days a yearThe bar compresses Yuma's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the January 19–February 9 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends December 7. Wherever the today marker sits, the nearest color change is your next appointment.
The Yuma pool calendar
Opening — target January 26
Open by January 26 — a two-week head start on the February 9 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline December 7
The window opens November 27 once water leaves the algae zone; the model deadline is December 7, a week ahead of the December 28 freeze normal.
Estimated water temperature by month
This is Yuma'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 58° | 60° | 65° | 71° | 77° | 85° | 93° | 95° | 93° | 84° | 72° | 60° |
Warmest water typically June–October (peaking near 95°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Tucson's pool season and Avondale's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Arizona season index.
Yuma pool season FAQ
When should I open my pool in Yuma, AZ?
Target January 26. That date backs off two weeks from the day Yuma's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Yuma opening guide.
When should I close my pool in Yuma?
The closing deadline is December 7 — late enough that the water has cooled out of the algae zone, early enough to beat Yuma's first-freeze normal by about a week. See the Yuma closing guide for the winterizing steps.
How long is the swim season in Yuma?
Yuma averages 241 days a year with normal highs of 80°F or better — about 30 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 Yuma?
An unheated pool near Yuma typically peaks around 95°F in high summer and bottoms out near 57°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 Yuma hits the closing window
Data: NOAA 1991–2020 climate normals via Yuma Mcas (5.3 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.