Pool season · Illinois
Schaumburg Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Schaumburg's pool year: both model windows, the estimated water-temperature curve, and today's live position on the season bar. The detailed checklists live on the opening and closing guides; this page is the calendar you check between them.
Schaumburg, IL — 99 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Schaumburg's swim season; the hollow teal run before it (April 29 to May 20) is when to open; the hollow amber run after is when to close, with October 4 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Schaumburg pool calendar
Opening — target May 6
Open by May 6 — a two-week head start on the May 20 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 4
Hold the cover until September 24, then winterize by October 4, a week ahead of the October 13 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Schaumburg'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° | 24° | 32° | 43° | 55° | 66° | 73° | 73° | 69° | 58° | 46° | 33° |
The curve peaks near 74°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Round Lake Beach's pool season and Springfield's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Illinois season index.
Schaumburg pool season FAQ
When should I open my pool in Schaumburg, IL?
Target May 6. That date backs off two weeks from the day Schaumburg's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Schaumburg opening guide.
When should I close my pool in Schaumburg?
The closing deadline is October 4 — late enough that the water has cooled out of the algae zone, early enough to beat Schaumburg's first-freeze normal by about a week. See the Schaumburg closing guide for the winterizing steps.
How long is the swim season in Schaumburg?
Schaumburg averages 99 days a year with normal highs of 80°F or better — right on the statewide median. The Illinois season index ranks all 18 covered cities by the same metric.
How warm does pool water get in Schaumburg?
An unheated pool near Schaumburg typically peaks around 74°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 Schaumburg hits the closing window
Data: NOAA 1991–2020 climate normals via Streamwood (4.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.