Pool season · Kansas
Olathe Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one Olathe 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.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is Olathe's swim season; the hollow teal run before it (April 14 to May 5) is when to open; the hollow amber run after is when to close, with October 16 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Olathe pool calendar
Opening — target April 21
Open by April 21 — a two-week head start on the May 5 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 16
Hold the cover until October 6, then winterize by October 16, a week ahead of the October 29 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Olathe'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 30° | 31° | 40° | 50° | 60° | 70° | 77° | 78° | 73° | 63° | 51° | 38° |
Warmest water typically August–August (peaking near 79°F); heaters and covers shift any month up.
Email me when Olathe hits the closing window
Data: NOAA 1991–2020 climate normals via Olathe 3e (3.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.