Pool season · Michigan
Farmington Hills Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Farmington Hills 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.
Farmington Hills, MI — 62 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Farmington Hills's swim season; the hollow teal run before it (May 5 to May 26) is when to open; the hollow amber run after is when to close, with September 29 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Farmington Hills pool calendar
Opening — target May 12
Open by May 12 — a two-week head start on the May 26 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline September 29
Hold the cover until September 19, then winterize by September 29, a week ahead of the October 17 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Farmington Hills'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 25° | 23° | 29° | 40° | 52° | 63° | 70° | 71° | 66° | 56° | 44° | 33° |
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 Detroit's pool season and Flint's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Michigan season index.
Farmington Hills pool season FAQ
When should I open my pool in Farmington Hills, MI?
Open by May 12 — the model places Farmington Hills's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Farmington Hills opening guide has the 12-step sequence.
When should I close my pool in Farmington Hills?
Close by September 29: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Farmington Hills closing guide sequences the work backward from that date.
How long is the swim season in Farmington Hills?
Farmington Hills averages 62 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 Farmington Hills?
An unheated pool near Farmington Hills typically peaks around 72°F in high summer and bottoms out near 23°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 Farmington Hills hits the closing window
Data: NOAA 1991–2020 climate normals via Farmington (1.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.