Pool swim season in Edinburg, TX
Swim season in Edinburg without a heater, and with one
An unheated pool in Edinburg reaches 78°F in May to Oct, about 6 months a year. The air allows up to 12 swimmable months with a heater (all year).
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What each heater buys you in Edinburg
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 6 | May to Oct | $0 | $0 |
| Solar cover only | 8 | Apr to Nov | $0 | $50 |
| Solar panels + cover | 9 | Mar to Nov | $0 | $283 |
| Heat pump + cover | 12 | all year | $373 | $923 |
| Gas heater + cover | 12 | all year | $879 | $1,304 |
For a 450 sq ft pool held at 80°F, at TX prices of 16.0¢/kWh electricity and $19/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Edinburg
Heat pump + cover: 12 of 12 possible months for about $923 a year all-in, which works out near $154 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: Edinburg, 1.4 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Edinburg 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 | 70° | 60° | 3.2 | 61° | 67° | $131 | $295 |
| Feb | 75° | 64° | 4.0 | 63° | 69° | $103 | $249 |
| Mar | 80° | 69° | 4.8 | 69° | 75° | $48 | $123 |
| Apr | 86° | 75° | 5.6 | 75° | 81° | – | – |
| May | 92° | 82° | 6.1 | 82° | 88° | – | – |
| Jun | 95° | 85° | 6.9 | 87° | 93° | – | – |
| Jul | 97° | 87° | 6.8 | 90° | 96° | – | – |
| Aug | 98° | 87° | 6.6 | 90° | 96° | – | – |
| Sep | 93° | 83° | 5.4 | 88° | 94° | – | – |
| Oct | 89° | 78° | 4.7 | 82° | 88° | – | – |
| Nov | 79° | 68° | 3.7 | 74° | 80° | $4 | $10 |
| Dec | 73° | 62° | 3.0 | 65° | 71° | $87 | $202 |
Heating costs most in Jan (about $131 with a heat pump, $295 with gas). Sunshine peaks in Jun at 6.9 kWh/m²/day (NASA satellite data, 40.0 km grid cell). Highlighted months are swimmable with no heater.
How Edinburg compares with nearby cities
Edinburg ranks 11 of 252 Texas cities for unheated swim months; San Juan, Alamo, Pharr nearby get a longer season without a heater.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| McAllen, TX | 9 mi | 6 | 12 | $351 |
| San Juan, TX | 9 mi | 7 | 12 | $254 |
| Alamo, TX | 10 mi | 7 | 12 | $254 |
| Alton, TX | 10 mi | 6 | 11 | $315 |
| Pharr, TX | 11 mi | 7 | 12 | $254 |
| Donna, TX | 13 mi | 6 | 12 | $349 |