Vermont Pool Season: Opening & Closing Dates by City

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

City Opening window Closing window Season
Burlington May 28 – Jun 18 Aug 26 – Sep 17 ≈ 92 days
Montpelier Jun 4 – Jul 1 Aug 18 – Sep 11 ≈ 78 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 Vermont's featured cities, typical openings spread from Jun 7 to Jun 14, closings from Aug 30 to Sep 6, and the unheated season runs 78–92 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.

Vermont planning pages

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