Pool season · New York
Yonkers Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Yonkers's whole pool calendar, condensed: when the water warms, when it cools, and where today falls between those edges. Use the opening guide and closing guide for the step-by-step work; keep this page for the dates.
Yonkers, NY — 86 swim days a yearThe bar compresses Yonkers's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 24–May 15 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 10. Wherever the today marker sits, the nearest color change is your next appointment.
The Yonkers pool calendar
Opening — target May 1
Target May 1; the practical window runs April 24–May 15, and the 7-day mean crosses the 61°F threshold around May 15. Cold-water starts are the cheap ones.
Closing — deadline October 10
The window opens September 30 once water leaves the algae zone; the model deadline is October 10, a week ahead of the October 26 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Yonkers'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 33° | 32° | 37° | 47° | 57° | 66° | 73° | 75° | 70° | 61° | 50° | 41° |
The curve peaks near 75°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Utica's pool season and Albany's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the New York season index.
Yonkers pool season FAQ
When should I open my pool in Yonkers, NY?
The site model recommends opening by May 1 — about two weeks before Yonkers'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 Yonkers opening guide.
When should I close my pool in Yonkers?
Winterize by October 10. The model holds the deadline a week ahead of Yonkers's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Yonkers closing guide.
How long is the swim season in Yonkers?
Yonkers averages 86 days a year with normal highs of 80°F or better — about 5 days earlier than the New York median. The New York season index ranks all 16 covered cities by the same metric.
How warm does pool water get in Yonkers?
An unheated pool near Yonkers typically peaks around 75°F in high summer and bottoms out near 31°F in winter, never quite reaching the 78°F comfort line without a heater or solar cover. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Yonkers hits the closing window
Data: NOAA 1991–2020 climate normals via Dobbs Ferry-ardsley (4.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.