Pool season · Utah
Lehi Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Lehi'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.
Lehi, UT — 99 swim days a yearThe bar compresses Lehi's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the May 6–May 27 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends September 30. Wherever the today marker sits, the nearest color change is your next appointment.
The Lehi pool calendar
Opening — target May 13
Target May 13; the practical window runs May 6–May 27, and the 7-day mean crosses the 61°F threshold around May 27. Cold-water starts are the cheap ones.
Closing — deadline September 30
Hold the cover until September 20, then winterize by September 30, a week ahead of the October 9 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Lehi'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 28° | 31° | 39° | 46° | 53° | 63° | 72° | 76° | 68° | 57° | 44° | 33° |
The curve peaks near 77°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Layton's pool season and Logan's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Utah season index.
Lehi pool season FAQ
When should I open my pool in Lehi, UT?
Open by May 13 — the model places Lehi's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Lehi opening guide has the 12-step sequence.
When should I close my pool in Lehi?
Close by September 30: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Lehi closing guide sequences the work backward from that date.
How long is the swim season in Lehi?
Lehi averages 99 days a year with normal highs of 80°F or better — about 11 days later than the Utah median. The Utah season index ranks all 12 covered cities by the same metric.
How warm does pool water get in Lehi?
An unheated pool near Lehi typically peaks around 77°F in high summer and bottoms out near 28°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 Lehi hits the closing window
Data: NOAA 1991–2020 climate normals via Utah Lake Lehi (3.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.