Pool swim season in Manchester, TN

When can you swim in an outdoor pool in Manchester, TN?

An unheated pool in Manchester never reaches 78°F in a normal year. It peaks around 78°F in Aug. The air allows up to 6 swimmable months with a heater (May to Oct).

1. J
2. F
3. M
4. A
5. M
6. J
7. J
8. A
9. S
10. O
11. N
12. D

What each heater buys you in Manchester

For a 450 sq ft pool held at 80°F, at TN prices of 13.8¢/kWh electricity and $12/Mcf gas. All-in spreads the purchase over the equipment's life.

The cheapest way to the full season in Manchester

Solar panels + cover: 5 of 6 possible months for about $283 a year all-in, which works out near $57 for each month it adds.

Before you pay for any heater, buy a solar cover: on its own it adds 3 months here for about $50 a year (why a cover comes first). If you get quotes, ask for a heat pump sized to your pool's surface area; here it beats gas all-in (heat pump or gas).

Weather station: Manchester #2, 3.7 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.

Manchester month by month: air, sun and pool water

Heating costs most in Oct (about $91 with a heat pump, $141 with gas). Sunshine peaks in Jun at 6.4 kWh/m²/day (NASA satellite data, 38.9 km grid cell). Highlighted months are swimmable with no heater.

How Manchester compares with nearby cities

Manchester ranks 60 of 65 Tennessee cities for unheated swim months; Tullahoma, Winchester, Shelbyville nearby get a longer season without a heater.