Pool swim season in Lumberton, NC
Lumberton, NC: how long the pool season really is
An unheated pool in Lumberton reaches 78°F in Jul to Sep, about 3 months a year. The air allows up to 7 swimmable months with a heater (Apr to Oct).
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What each heater buys you in Lumberton
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 3 | Jul to Sep | $0 | $0 |
| Solar cover only | 4 | Jun to Sep | $0 | $50 |
| Solar panels + cover | 6 | May to Oct | $0 | $283 |
| Heat pump + cover | 7 | Apr to Oct | $207 | $757 |
| Gas heater + cover | 7 | Apr to Oct | $448 | $873 |
For a 450 sq ft pool held at 80°F, at NC prices of 14.9¢/kWh electricity and $16/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Lumberton
Solar panels + cover: 6 of 7 possible months for about $283 a year all-in, which works out near $94 for each month it adds.
Before you pay for any heater, buy a solar cover: on its own it adds 1 month 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: Lumberton, 0.4 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Lumberton 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 | 54° | 44° | 2.8 | 45° | 51° | – | – |
| Feb | 58° | 46° | 3.4 | 46° | 52° | – | – |
| Mar | 65° | 53° | 4.5 | 51° | 57° | – | – |
| Apr | 74° | 62° | 5.7 | 60° | 66° | $126 | $265 |
| May | 81° | 70° | 6.1 | 69° | 75° | $41 | $97 |
| Jun | 88° | 78° | 6.4 | 77° | 83° | – | – |
| Jul | 91° | 81° | 6.2 | 83° | 89° | – | – |
| Aug | 89° | 79° | 5.5 | 83° | 89° | – | – |
| Sep | 84° | 74° | 4.8 | 78° | 84° | – | – |
| Oct | 75° | 63° | 3.9 | 70° | 76° | $40 | $86 |
| Nov | 65° | 53° | 3.0 | 58° | 64° | – | – |
| Dec | 57° | 47° | 2.4 | 49° | 55° | – | – |
Heating costs most in Apr (about $126 with a heat pump, $265 with gas). Sunshine peaks in Jun at 6.4 kWh/m²/day (NASA satellite data, 46.4 km grid cell). Highlighted months are swimmable with no heater.
How Lumberton compares with nearby cities
Lumberton ranks 8 of 91 North Carolina cities for unheated swim months; Laurinburg nearby gets a longer season without a heater.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Hope Mills, NC | 24 mi | 3 | 7 | $185 |
| Laurinburg, NC | 28 mi | 4 | 7 | $164 |
| Fayetteville, NC | 31 mi | 2 | 7 | $224 |
| Spring Lake, NC | 38 mi | 2 | 7 | $224 |
| Southern Pines, NC | 45 mi | 2 | 7 | $257 |
| Pinehurst, NC | 46 mi | 2 | 7 | $257 |