Pool swim season in Maricopa, AZ
When can you swim in an outdoor pool in Maricopa, AZ?
An unheated pool in Maricopa 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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What each heater buys you in Maricopa
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 6 | May to Oct | $0 | $0 |
| Solar cover only | 6 | May to Oct | $0 | $50 |
| Solar panels + cover | 8 | Apr to Nov | $0 | $283 |
| Heat pump + cover | 10 | Feb to Nov | $384 | $934 |
| Gas heater + cover | 10 | Feb to Nov | $868 | $1,293 |
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 Maricopa
Heat pump + cover: 10 of 10 possible months for about $934 a year all-in, which works out near $234 for each month it adds.
A solar cover alone adds no swim months here, so if you want a longer season you need a heater (why); still use one at night to hold the heat you pay for. 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: Maricopa 4 N, 5.3 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Maricopa 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 | 69° | 53° | 3.4 | 53° | 59° | – | – |
| Feb | 73° | 56° | 4.3 | 56° | 62° | $181 | $389 |
| Mar | 80° | 62° | 5.8 | 62° | 68° | $109 | $254 |
| Apr | 88° | 70° | 7.3 | 70° | 76° | $32 | $83 |
| May | 97° | 78° | 8.2 | 79° | 85° | – | – |
| Jun | 107° | 88° | 8.5 | 89° | 95° | – | – |
| Jul | 109° | 93° | 7.4 | 95° | 101° | – | – |
| Aug | 107° | 92° | 6.9 | 97° | 103° | – | – |
| Sep | 102° | 86° | 6.1 | 92° | 98° | – | – |
| Oct | 91° | 73° | 5.0 | 81° | 87° | – | – |
| Nov | 78° | 60° | 3.8 | 67° | 73° | $62 | $142 |
| Dec | 68° | 51° | 3.0 | 56° | 62° | – | – |
Heating costs most in Feb (about $181 with a heat pump, $389 with gas). Sunshine peaks in Jun at 8.5 kWh/m²/day (NASA satellite data, 68.9 km grid cell). Highlighted months are swimmable with no heater.
How Maricopa compares with nearby cities
Maricopa ranks 9 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 |
|---|---|---|---|---|
| Casa Grande, AZ | 17 mi | 6 | 10 | $339 |
| Chandler, AZ | 19 mi | 6 | 11 | $550 |
| Gilbert, AZ | 24 mi | 6 | 9 | $206 |
| Tempe, AZ | 24 mi | 6 | 11 | $550 |
| Goodyear, AZ | 26 mi | 6 | 10 | $296 |
| Queen Creek, AZ | 26 mi | 6 | 9 | $206 |