Kentucky Pool Season: Opening & Closing Dates by City

Local dates for every featured Kentucky city — when the water warms up, when it cools off, and how long the season actually lasts.

City Opening window Closing window Season
Louisville Apr 28 – May 17 Sep 24 – Oct 10 ≈ 148 days
Lexington May 4 – May 26 Sep 18 – Oct 4 ≈ 135 days

Windows show the stretch when each city's daily average passes through the low-to-mid 60s°F (1991–2020 NOAA records, nearest station to each city). Click a city for its month-by-month table and full season notes.

Season geography

Across Kentucky's featured cities, typical openings spread from May 7 to May 14, closings from Sep 26 to Oct 2, and the unheated season runs 135–148 days depending on where you are. Elevation, coastal water, and urban heat all pull real dates around, which is exactly why a state-level answer isn't enough.

For your exact town, the pool season lookup takes a ZIP code. Opening day itself is a chemistry job — the dosing calculator turns your first test reading of the year into exact amounts.

Kentucky planning pages

When to open — Kentucky When to close — Kentucky All states →