Pool season · Arkansas
Jonesboro Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Jonesboro'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.
Jonesboro, AR — 138 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Jonesboro's swim season; the hollow teal run before it (March 27 to April 17) is when to open; the hollow amber run after is when to close, with October 28 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Jonesboro pool calendar
Opening — target April 3
Target April 3; the practical window runs March 27–April 17, and the 7-day mean crosses the 61°F threshold around April 17. Cold-water starts are the cheap ones.
Closing — deadline October 28
Hold the cover until October 18, then winterize by October 28, a week ahead of the November 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 Jonesboro'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 39° | 40° | 47° | 56° | 66° | 76° | 81° | 81° | 77° | 68° | 56° | 45° |
Warmest water typically July–August (peaking near 82°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Fort Smith's pool season and Little Rock's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Arkansas season index.
Jonesboro pool season FAQ
When should I open my pool in Jonesboro, AR?
The site model recommends opening by April 3 — about two weeks before Jonesboro's 7-day mean temperature crosses 61°F, while the water is still too cold for algae. The step-by-step sequence is in the Jonesboro opening guide.
When should I close my pool in Jonesboro?
Winterize by October 28. The model holds the deadline a week ahead of Jonesboro's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Jonesboro closing guide.
How long is the swim season in Jonesboro?
Jonesboro averages 138 days a year with normal highs of 80°F or better — about 4 days earlier than the Arkansas median. The Arkansas season index ranks all 7 covered cities by the same metric.
How warm does pool water get in Jonesboro?
An unheated pool near Jonesboro typically peaks around 82°F in high summer and bottoms out near 39°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 Jonesboro hits the closing window
Data: NOAA 1991–2020 climate normals via Jonesboro Municipal Airport (1.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.