Pool season · Mississippi
Jackson Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Jackson 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.
Jackson, MS — 165 swim days a yearEach dot on the bar is one week of Jackson's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (March 5–March 26), solid teal is swim season, and hollow amber is the closing window ending November 9. The black marker is today — its position against the colors is the entire executive summary.
The Jackson pool calendar
Opening — target March 12
Target March 12; the practical window runs March 5–March 26, and the 7-day mean crosses the 61°F threshold around March 26. Cold-water starts are the cheap ones.
Closing — deadline November 9
Hold the cover until October 30, then winterize by November 9, a week ahead of the November 19 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Jackson'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 48° | 49° | 55° | 63° | 70° | 78° | 82° | 83° | 81° | 73° | 61° | 52° |
Warmest water typically June–September (peaking near 83°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Hattiesburg's pool season and Gulfport's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Mississippi season index.
Jackson pool season FAQ
When should I open my pool in Jackson, MS?
Open by March 12 — the model places Jackson's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Jackson opening guide has the 12-step sequence.
When should I close my pool in Jackson?
Close by November 9: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Jackson closing guide sequences the work backward from that date.
How long is the swim season in Jackson?
Jackson averages 165 days a year with normal highs of 80°F or better — right on the statewide median. The Mississippi season index ranks all 3 covered cities by the same metric.
How warm does pool water get in Jackson?
An unheated pool near Jackson typically peaks around 83°F in high summer and bottoms out near 47°F in winter, spending roughly 3 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 Jackson hits the closing window
Data: NOAA 1991–2020 climate normals via Jackson Hawkins Field (1.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.