Pool swim season in Bardstown, KY
Swim season in Bardstown without a heater, and with one
An unheated pool in Bardstown reaches 78°F in Aug, about 1 month a year. The air allows up to 5 swimmable months with a heater (May to Sep).
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Heater options for a Bardstown pool, side by side
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 1 | Aug | $0 | $0 |
| Solar cover only | 4 | Jun to Sep | $0 | $50 |
| Solar panels + cover | 5 | May to Sep | $0 | $283 |
| Heat pump + cover | 5 | May to Sep | $87 | $637 |
| Gas heater + cover | 5 | May to Sep | $178 | $603 |
For a 450 sq ft pool held at 80°F, at KY prices of 14.2¢/kWh electricity and $14/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Bardstown
Solar cover only: 4 of 5 possible months for about $50 a year all-in, which works out near $17 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 gas as well as a heat pump: once the purchase price is counted, gas comes out cheaper all-in here (heat pump or gas).
Weather station: Bardstown 5E, 3.9 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Bardstown month by month: air, sun and pool water
| Month | Air high | Air avg | Sun kWh/m²/day | Water, unheated | Water, covered | Heat pump $ | Gas $ |
|---|---|---|---|---|---|---|---|
| Jan | 43° | 35° | 2.0 | 36° | 42° | – | – |
| Feb | 48° | 39° | 2.7 | 36° | 42° | – | – |
| Mar | 57° | 47° | 3.8 | 44° | 50° | – | – |
| Apr | 69° | 57° | 5.1 | 54° | 60° | – | – |
| May | 77° | 66° | 5.7 | 64° | 70° | $79 | $160 |
| Jun | 84° | 73° | 6.3 | 73° | 79° | $8 | $18 |
| Jul | 87° | 77° | 6.1 | 78° | 84° | – | – |
| Aug | 86° | 75° | 5.6 | 79° | 85° | – | – |
| Sep | 81° | 69° | 4.7 | 74° | 80° | – | – |
| Oct | 70° | 58° | 3.5 | 64° | 70° | – | – |
| Nov | 57° | 47° | 2.5 | 52° | 58° | – | – |
| Dec | 47° | 38° | 1.8 | 41° | 47° | – | – |
Heating costs most in May (about $79 with a heat pump, $160 with gas). Sunshine peaks in Jun at 6.3 kWh/m²/day (NASA satellite data, 35.5 km grid cell). Highlighted months are swimmable with no heater.
How Bardstown compares with nearby cities
Bardstown ranks 25 of 42 Kentucky cities for unheated swim months; Mount Washington, Shepherdsville, Louisville/Jefferson County nearby get a longer season without a heater.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Mount Washington, KY | 16 mi | 2 | 5 | $81 |
| Shepherdsville, KY | 18 mi | 2 | 7 | $340 |
| Elizabethtown, KY | 24 mi | 0 | 5 | $117 |
| Louisville/Jefferson County, KY | 26 mi | 2 | 5 | $81 |
| Radcliff, KY | 26 mi | 0 | 5 | $117 |
| Jeffersontown, KY | 28 mi | 2 | 5 | $70 |