Pool swim season in Avondale, AZ
When can you swim in an outdoor pool in Avondale, AZ?
An unheated pool in Avondale reaches 78°F in May to Oct, about 6 months a year. The air allows up to 10 swimmable months with a heater (Feb to Nov).
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Heater options for a Avondale pool, side by side
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 6 | May to Oct | $0 | $0 |
| Solar cover only | 7 | Apr to Oct | $0 | $50 |
| Solar panels + cover | 9 | Mar to Nov | $0 | $283 |
| Heat pump + cover | 10 | Feb to Nov | $296 | $846 |
| Gas heater + cover | 10 | Feb to Nov | $682 | $1,107 |
For a 450 sq ft pool held at 80°F, at AZ prices of 15.4¢/kWh electricity and $19/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Avondale
Solar panels + cover: 9 of 10 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: Laveen 3 SSE, 10.6 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Avondale 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 | 67° | 55° | 3.4 | 55° | 61° | – | – |
| Feb | 71° | 58° | 4.4 | 58° | 64° | $157 | $346 |
| Mar | 79° | 65° | 5.9 | 64° | 70° | $87 | $210 |
| Apr | 87° | 72° | 7.3 | 72° | 78° | $14 | $36 |
| May | 96° | 81° | 8.2 | 81° | 87° | – | – |
| Jun | 106° | 90° | 8.5 | 91° | 97° | – | – |
| Jul | 107° | 94° | 7.5 | 97° | 103° | – | – |
| Aug | 106° | 93° | 6.9 | 98° | 104° | – | – |
| Sep | 101° | 88° | 6.2 | 94° | 100° | – | – |
| Oct | 89° | 75° | 5.0 | 83° | 89° | – | – |
| Nov | 76° | 63° | 3.8 | 70° | 76° | $38 | $90 |
| Dec | 66° | 54° | 3.1 | 59° | 65° | – | – |
Heating costs most in Feb (about $157 with a heat pump, $346 with gas). Sunshine peaks in Jun at 8.5 kWh/m²/day (NASA satellite data, 26.1 km grid cell). Highlighted months are swimmable with no heater.
How Avondale compares with nearby cities
Avondale ranks 7 of 44 Arizona cities for unheated swim months, and no nearby city gets a longer unheated season.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Goodyear, AZ | 5 mi | 6 | 10 | $296 |
| Glendale, AZ | 17 mi | 6 | 9 | $194 |
| El Mirage, AZ | 19 mi | 6 | 9 | $194 |
| Buckeye, AZ | 20 mi | 6 | 10 | $308 |
| Phoenix, AZ | 23 mi | 6 | 9 | $174 |
| Tempe, AZ | 24 mi | 6 | 11 | $550 |