Pool season · California
Rancho Cordova Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Rancho Cordova'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.
Rancho Cordova, CA — 156 swim days a yearThe bar compresses Rancho Cordova's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 25–April 15 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 9. Wherever the today marker sits, the nearest color change is your next appointment.
The Rancho Cordova pool calendar
Opening — target April 1
Target April 1; the practical window runs March 25–April 15, and the 7-day mean crosses the 61°F threshold around April 15. Cold-water starts are the cheap ones.
Closing — deadline November 9
Hold the cover until October 30, then winterize by November 9, a week ahead of the December 16 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Rancho Cordova'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 48° | 51° | 56° | 59° | 65° | 71° | 77° | 78° | 76° | 70° | 60° | 51° |
Warmest water typically August–August (peaking near 78°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Porterville's pool season and Rancho Cucamonga's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the California season index.
Rancho Cordova pool season FAQ
When should I open my pool in Rancho Cordova, CA?
The site model recommends opening by April 1 — about two weeks before Rancho Cordova's 7-day mean temperature crosses 61°F, while the water is still too cold for algae. The step-by-step sequence is in the Rancho Cordova opening guide.
When should I close my pool in Rancho Cordova?
Winterize by November 9. The model holds the deadline a week ahead of Rancho Cordova's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Rancho Cordova closing guide.
How long is the swim season in Rancho Cordova?
Rancho Cordova averages 156 days a year with normal highs of 80°F or better — right on the statewide median. The California season index ranks all 147 covered cities by the same metric.
How warm does pool water get in Rancho Cordova?
An unheated pool near Rancho Cordova typically peaks around 78°F in high summer and bottoms out near 48°F in winter, never quite reaching the 78°F comfort line without a heater or solar cover. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Rancho Cordova hits the closing window
Data: NOAA 1991–2020 climate normals via Sacramento 5 ESE (8.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.