Pool swim season in Eagle Pass, TX
Swim season in Eagle Pass without a heater, and with one
An unheated pool in Eagle Pass reaches 78°F in Jun to Sep, about 4 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 Eagle Pass
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 4 | Jun to Sep | $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 | $403 | $953 |
| Gas heater + cover | 10 | Feb to Nov | $921 | $1,346 |
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 Eagle Pass
Heat pump + cover: 10 of 10 possible months for about $953 a year all-in, which works out near $159 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: Eagle Pass 3N, 3.9 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Eagle Pass 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 | 65° | 52° | 3.3 | 53° | 59° | – | – |
| Feb | 70° | 57° | 4.1 | 56° | 62° | $193 | $417 |
| Mar | 78° | 65° | 5.0 | 63° | 69° | $106 | $257 |
| Apr | 84° | 71° | 5.9 | 71° | 77° | $29 | $76 |
| May | 90° | 78° | 6.1 | 78° | 84° | – | – |
| Jun | 96° | 84° | 7.0 | 85° | 91° | – | – |
| Jul | 98° | 86° | 6.8 | 89° | 95° | – | – |
| Aug | 99° | 87° | 6.6 | 90° | 96° | – | – |
| Sep | 92° | 80° | 5.4 | 86° | 92° | – | – |
| Oct | 83° | 71° | 4.6 | 78° | 84° | – | – |
| Nov | 72° | 60° | 3.6 | 66° | 72° | $75 | $171 |
| Dec | 65° | 52° | 3.1 | 56° | 62° | – | – |
Heating costs most in Feb (about $193 with a heat pump, $417 with gas). Sunshine peaks in Jun at 7.0 kWh/m²/day (NASA satellite data, 22.5 km grid cell). Highlighted months are swimmable with no heater.
How Eagle Pass compares with nearby cities
Eagle Pass ranks 58 of 252 Texas cities for unheated swim months; Del Rio, Laredo, Helotes nearby get a longer season without a heater.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Del Rio, TX | 52 mi | 6 | 10 | $259 |
| Uvalde, TX | 55 mi | 4 | 9 | $344 |
| Laredo, TX | 99 mi | 6 | 10 | $194 |
| Pleasanton, TX | 121 mi | 4 | 9 | $220 |
| Kerrville, TX | 123 mi | 4 | 7 | $137 |
| Helotes, TX | 124 mi | 5 | 9 | $191 |