Pool swim season in South Sioux City, NE
Swim season in South Sioux City without a heater, and with one
An unheated pool in South Sioux City never reaches 78°F in a normal year. It peaks around 76°F in Jul. The air allows up to 5 swimmable months with a heater (May to Sep).
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What each heater buys you in South Sioux City
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 0 | no month | $0 | $0 |
| Solar cover only | 2 | Jul to Aug | $0 | $50 |
| Solar panels + cover | 4 | Jun to Sep | $0 | $283 |
| Heat pump + cover | 5 | May to Sep | $218 | $768 |
| Gas heater + cover | 5 | May to Sep | $370 | $795 |
For a 450 sq ft pool held at 80°F, at NE prices of 12.9¢/kWh electricity and $11/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in South Sioux City
Solar panels + cover: 4 of 5 possible months for about $283 a year all-in, which works out near $71 for each month it adds.
Before you pay for any heater, buy a solar cover: on its own it adds 2 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: Sioux City Ang, 4.9 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
South Sioux City 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 | 30° | 19° | 2.0 | 21° | 27° | – | – |
| Feb | 35° | 24° | 3.1 | 22° | 28° | – | – |
| Mar | 47° | 36° | 3.8 | 30° | 36° | – | – |
| Apr | 61° | 48° | 5.0 | 44° | 50° | – | – |
| May | 72° | 59° | 5.8 | 56° | 62° | $143 | $234 |
| Jun | 82° | 70° | 6.5 | 68° | 74° | $41 | $77 |
| Jul | 86° | 75° | 6.6 | 76° | 82° | – | – |
| Aug | 83° | 72° | 5.6 | 76° | 82° | – | – |
| Sep | 77° | 64° | 4.5 | 70° | 76° | $34 | $59 |
| Oct | 64° | 51° | 3.2 | 58° | 64° | – | – |
| Nov | 47° | 36° | 2.2 | 42° | 48° | – | – |
| Dec | 34° | 24° | 1.6 | 28° | 34° | – | – |
Heating costs most in May (about $143 with a heat pump, $234 with gas). Sunshine peaks in Jul at 6.6 kWh/m²/day (NASA satellite data, 8.3 km grid cell). Highlighted months are swimmable with no heater.
How South Sioux City compares with nearby cities
South Sioux City ranks 15 of 16 Nebraska cities for unheated swim months, and no nearby city gets a longer unheated season.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Sioux City, IA | 3 mi | 0 | 5 | $245 |
| Le Mars, IA | 25 mi | 0 | 5 | $263 |
| Vermillion, SD | 34 mi | 0 | 5 | $222 |
| Yankton, SD | 58 mi | 0 | 5 | $228 |
| Norfolk, NE | 60 mi | 0 | 5 | $225 |
| Storm Lake, IA | 63 mi | 0 | 4 | $96 |