Pool swim season in Apache Junction, AZ

Swim season in Apache Junction without a heater, and with one

An unheated pool in Apache Junction reaches 78°F in Jun to Oct, about 5 months a year. The air allows up to 10 swimmable months with a heater (Feb to Nov).

1. J
2. F
3. M
4. A
5. M
6. J
7. J
8. A
9. S
10. O
11. N
12. D

What each heater buys you in Apache Junction

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 Apache Junction

Heat pump + cover: 10 of 10 possible months for about $902 a year all-in, which works out near $180 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: Apache Junction 5 NE, 6.5 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.

Apache Junction month by month: air, sun and pool water

Heating costs most in Feb (about $167 with a heat pump, $362 with gas). Sunshine peaks in Jun at 8.5 kWh/m²/day (NASA satellite data, 13.6 km grid cell). Highlighted months are swimmable with no heater.

How Apache Junction compares with nearby cities

Apache Junction ranks 24 of 44 Arizona cities for unheated swim months; Mesa, Queen Creek, Gilbert nearby get a longer season without a heater.