Pool swim season in Sparks, NV
Sparks, NV: how long the pool season really is
An unheated pool in Sparks never reaches 78°F in a normal year. It peaks around 77°F in Aug. The air allows up to 6 swimmable months with a heater (May to Oct).
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What each heater buys you in Sparks
| 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 | 6 | May to Oct | $314 | $864 |
| Gas heater + cover | 6 | May to Oct | $565 | $990 |
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 Sparks
Heat pump + cover: 6 of 6 possible months for about $864 a year all-in, which works out near $144 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: Sparks, 1.6 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Sparks 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 | 48° | 37° | 2.4 | 36° | 42° | – | – |
| Feb | 53° | 40° | 3.4 | 39° | 45° | – | – |
| Mar | 60° | 46° | 4.8 | 45° | 51° | – | – |
| Apr | 65° | 51° | 6.3 | 52° | 58° | – | – |
| May | 74° | 59° | 7.3 | 59° | 65° | $128 | $230 |
| Jun | 84° | 67° | 8.3 | 68° | 74° | $46 | $93 |
| Jul | 92° | 74° | 8.0 | 75° | 81° | – | – |
| Aug | 91° | 72° | 7.3 | 77° | 83° | – | – |
| Sep | 84° | 65° | 5.9 | 71° | 77° | $20 | $40 |
| Oct | 72° | 54° | 4.3 | 61° | 67° | $120 | $202 |
| Nov | 57° | 43° | 2.8 | 48° | 54° | – | – |
| Dec | 47° | 36° | 2.0 | 39° | 45° | – | – |
Heating costs most in May (about $128 with a heat pump, $230 with gas). Sunshine peaks in Jun at 8.3 kWh/m²/day (NASA satellite data, 20.2 km grid cell). Highlighted months are swimmable with no heater.
How Sparks compares with nearby cities
Sparks ranks 8 of 10 Nevada cities for unheated swim months; Reno, Fernley nearby get a longer season without a heater.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Reno, NV | 7 mi | 1 | 5 | $167 |
| Fernley, NV | 28 mi | 2 | 6 | $185 |
| Carson, NV | 29 mi | 0 | 5 | $247 |
| Truckee, CA | 30 mi | 0 | 4 | $972 |
| South Lake Tahoe, CA | 47 mi | 0 | 4 | $1,061 |
| Grass Valley, CA | 75 mi | 0 | 6 | $650 |