Pool swim season in Fernley, NV
Swim season in Fernley without a heater, and with one
An unheated pool in Fernley reaches 78°F in Jul to Aug, about 2 months a year. The air allows up to 6 swimmable months with a heater (May to Oct).
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Heater options for a Fernley pool, side by side
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 2 | Jul to Aug | $0 | $0 |
| Solar cover only | 4 | Jun to Sep | $0 | $50 |
| Solar panels + cover | 5 | May to Sep | $0 | $283 |
| Heat pump + cover | 6 | May to Oct | $185 | $735 |
| Gas heater + cover | 6 | May to Oct | $342 | $767 |
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 Fernley
Solar panels + cover: 5 of 6 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 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: Lahontan Dam, 9.4 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Fernley 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 | 47° | 36° | 2.4 | 35° | 41° | – | – |
| Feb | 53° | 41° | 3.4 | 39° | 45° | – | – |
| Mar | 61° | 48° | 4.8 | 46° | 52° | – | – |
| Apr | 67° | 54° | 6.3 | 54° | 60° | – | – |
| May | 76° | 62° | 7.3 | 62° | 68° | $94 | $179 |
| Jun | 87° | 72° | 8.3 | 73° | 79° | $11 | $23 |
| Jul | 96° | 81° | 8.0 | 82° | 88° | – | – |
| Aug | 94° | 79° | 7.3 | 84° | 90° | – | – |
| Sep | 86° | 70° | 5.9 | 77° | 83° | – | – |
| Oct | 72° | 57° | 4.3 | 65° | 71° | $80 | $140 |
| Nov | 57° | 44° | 2.8 | 50° | 56° | – | – |
| Dec | 46° | 35° | 2.0 | 39° | 45° | – | – |
Heating costs most in May (about $94 with a heat pump, $179 with gas). Sunshine peaks in Jun at 8.3 kWh/m²/day (NASA satellite data, 27.6 km grid cell). Highlighted months are swimmable with no heater.
How Fernley compares with nearby cities
Fernley ranks 6 of 10 Nevada cities for unheated swim months, and no nearby city gets a longer unheated season.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Sparks, NV | 28 mi | 0 | 6 | $314 |
| Reno, NV | 35 mi | 1 | 5 | $167 |
| Carson, NV | 41 mi | 0 | 5 | $247 |
| Truckee, CA | 56 mi | 0 | 4 | $972 |
| South Lake Tahoe, CA | 61 mi | 0 | 4 | $1,061 |
| Susanville, CA | 97 mi | 0 | 4 | $333 |