Pool season · Kansas
Kansas City Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Kansas City 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.
Kansas City, KS — 114 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Kansas City's swim season; the hollow teal run before it (April 9 to April 30) is when to open; the hollow amber run after is when to close, with October 20 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Kansas City pool calendar
Opening — target April 16
Open by April 16 — a two-week head start on the April 30 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 20
The window opens October 10 once water leaves the algae zone; the model deadline is October 20, a week ahead of the November 2 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Kansas City'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 32° | 33° | 42° | 52° | 62° | 73° | 80° | 81° | 75° | 65° | 51° | 40° |
Warmest water typically July–August (peaking near 81°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Wichita's pool season and Lawrence's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Kansas season index.
Kansas City pool season FAQ
When should I open my pool in Kansas City, KS?
Open by April 16 — the model places Kansas City's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Kansas City opening guide has the 12-step sequence.
When should I close my pool in Kansas City?
Close by October 20: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Kansas City closing guide sequences the work backward from that date.
How long is the swim season in Kansas City?
Kansas City averages 114 days a year with normal highs of 80°F or better — about 6 days earlier than the Kansas median. The Kansas season index ranks all 6 covered cities by the same metric.
How warm does pool water get in Kansas City?
An unheated pool near Kansas City typically peaks around 81°F in high summer and bottoms out near 31°F in winter, spending roughly 2 months at or above the 78°F comfort line most swimmers prefer. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Kansas City hits the closing window
Data: NOAA 1991–2020 climate normals via Kansas City Downtown Airport (7.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.