Pool swim season in Henderson, NV
Swim season in Henderson without a heater, and with one
An unheated pool in Henderson reaches 78°F in Jun to Oct, about 5 months a year. The air allows up to 8 swimmable months with a heater (Mar to Oct).
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What each heater buys you in Henderson
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 5 | Jun to Oct | $0 | $0 |
| Solar cover only | 6 | May to Oct | $0 | $50 |
| Solar panels + cover | 7 | Apr to Oct | $0 | $283 |
| Heat pump + cover | 8 | Mar to Oct | $161 | $711 |
| Gas heater + cover | 8 | Mar to Oct | $308 | $733 |
For a 450 sq ft pool held at 80°F, at NV prices of 13.4¢/kWh electricity and $13/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Henderson
Solar panels + cover: 7 of 8 possible months for about $283 a year all-in, which works out near $142 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: Mccarran International Airport, 8.8 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Henderson 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 | 59° | 50° | 3.0 | 49° | 55° | – | – |
| Feb | 63° | 54° | 4.0 | 53° | 59° | – | – |
| Mar | 71° | 61° | 5.5 | 60° | 66° | $117 | $219 |
| Apr | 79° | 68° | 6.9 | 68° | 74° | $44 | $89 |
| May | 89° | 77° | 7.8 | 77° | 83° | – | – |
| Jun | 99° | 88° | 8.5 | 88° | 94° | – | – |
| Jul | 105° | 93° | 7.6 | 95° | 101° | – | – |
| Aug | 103° | 92° | 7.1 | 97° | 103° | – | – |
| Sep | 95° | 84° | 6.2 | 91° | 97° | – | – |
| Oct | 81° | 70° | 4.7 | 79° | 85° | – | – |
| Nov | 67° | 57° | 3.4 | 64° | 70° | – | – |
| Dec | 57° | 48° | 2.7 | 52° | 58° | – | – |
Heating costs most in Mar (about $117 with a heat pump, $219 with gas). Sunshine peaks in Jun at 8.5 kWh/m²/day (NASA satellite data, 69.1 km grid cell). Highlighted months are swimmable with no heater.
How Henderson compares with nearby cities
Henderson ranks 2 of 10 Nevada cities for unheated swim months; Boulder City, Bullhead City nearby get a longer season without a heater.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Boulder City, NV | 13 mi | 6 | 8 | $133 |
| North Las Vegas, NV | 20 mi | 5 | 8 | $162 |
| Las Vegas, NV | 20 mi | 4 | 8 | $183 |
| Bullhead City, AZ | 66 mi | 6 | 9 | $144 |
| Mesquite, NV | 75 mi | 4 | 8 | $253 |
| Kingman, AZ | 79 mi | 4 | 7 | $200 |