Pool season · Pennsylvania
Pittsburgh Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Pittsburgh'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.
Pittsburgh, PA — 70 swim days a yearThe bar compresses Pittsburgh's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 22–May 13 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 8. Wherever the today marker sits, the nearest color change is your next appointment.
The Pittsburgh pool calendar
Opening — target April 29
Target April 29; the practical window runs April 22–May 13, and the 7-day mean crosses the 61°F threshold around May 13. Cold-water starts are the cheap ones.
Closing — deadline October 8
Hold the cover until September 28, then winterize by October 8, a week ahead of the October 28 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Pittsburgh'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 31° | 30° | 36° | 47° | 58° | 66° | 72° | 73° | 69° | 60° | 48° | 38° |
The curve peaks near 74°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Philadelphia's pool season and Reading's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Pennsylvania season index.
Pittsburgh pool season FAQ
When should I open my pool in Pittsburgh, PA?
Target April 29. That date backs off two weeks from the day Pittsburgh's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Pittsburgh opening guide.
When should I close my pool in Pittsburgh?
The closing deadline is October 8 — late enough that the water has cooled out of the algae zone, early enough to beat Pittsburgh's first-freeze normal by about a week. See the Pittsburgh closing guide for the winterizing steps.
How long is the swim season in Pittsburgh?
Pittsburgh averages 70 days a year with normal highs of 80°F or better — right on the statewide median. The Pennsylvania season index ranks all 12 covered cities by the same metric.
How warm does pool water get in Pittsburgh?
An unheated pool near Pittsburgh typically peaks around 74°F in high summer and bottoms out near 29°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 Pittsburgh hits the closing window
Data: NOAA 1991–2020 climate normals via Pittsburgh Allegheny Co Airport (6.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.