Pool season · Michigan
Sterling Heights Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Sterling Heights'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.
Sterling Heights, MI — 56 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Sterling Heights's swim season; the hollow teal run before it (May 6 to May 27) is when to open; the hollow amber run after is when to close, with October 1 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Sterling Heights pool calendar
Opening — target May 13
Open by May 13 — a two-week head start on the May 27 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 1
Hold the cover until September 21, then winterize by October 1, a week ahead of the October 24 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Sterling Heights'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° | 25° | 31° | 41° | 52° | 63° | 71° | 71° | 67° | 57° | 45° | 35° |
The curve peaks near 72°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Southfield's pool season and Troy's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Michigan season index.
Sterling Heights pool season FAQ
When should I open my pool in Sterling Heights, MI?
Target May 13. That date backs off two weeks from the day Sterling Heights's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Sterling Heights opening guide.
When should I close my pool in Sterling Heights?
The closing deadline is October 1 — late enough that the water has cooled out of the algae zone, early enough to beat Sterling Heights's first-freeze normal by about a week. See the Sterling Heights closing guide for the winterizing steps.
How long is the swim season in Sterling Heights?
Sterling Heights averages 56 days a year with normal highs of 80°F or better — right on the statewide median. The Michigan season index ranks all 23 covered cities by the same metric.
How warm does pool water get in Sterling Heights?
An unheated pool near Sterling Heights typically peaks around 72°F in high summer and bottoms out near 24°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 Sterling Heights hits the closing window
Data: NOAA 1991–2020 climate normals via Mt Clemens Ang Base (10.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.