Pool swim season in Lake Jackson, TX
Lake Jackson, TX: how long the pool season really is
An unheated pool in Lake Jackson reaches 78°F in Jun to Sep, about 4 months a year. The air allows up to 9 swimmable months with a heater (Mar to Nov).
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Heater options for a Lake Jackson pool, side by side
| 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 | 9 | Mar to Nov | $198 | $748 |
| Gas heater + cover | 9 | Mar to Nov | $481 | $906 |
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 Lake Jackson
Solar panels + cover: 8 of 9 possible months for about $283 a year all-in, which works out near $71 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: Angleton Lk Jackson Brazoria C, 4.5 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Lake Jackson 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° | 55° | 2.9 | 56° | 62° | – | – |
| Feb | 69° | 59° | 3.3 | 57° | 63° | – | – |
| Mar | 74° | 64° | 4.5 | 63° | 69° | $104 | $249 |
| Apr | 79° | 70° | 5.3 | 69° | 75° | $41 | $106 |
| May | 86° | 77° | 6.0 | 77° | 83° | – | – |
| Jun | 91° | 82° | 6.3 | 83° | 89° | – | – |
| Jul | 93° | 84° | 6.1 | 86° | 92° | – | – |
| Aug | 93° | 84° | 5.9 | 87° | 93° | – | – |
| Sep | 89° | 80° | 5.0 | 84° | 90° | – | – |
| Oct | 84° | 73° | 4.4 | 78° | 84° | – | – |
| Nov | 74° | 63° | 3.3 | 68° | 74° | $53 | $126 |
| Dec | 67° | 57° | 2.6 | 60° | 66° | – | – |
Heating costs most in Mar (about $104 with a heat pump, $249 with gas). Sunshine peaks in Jun at 6.3 kWh/m²/day (NASA satellite data, 50.2 km grid cell). Highlighted months are swimmable with no heater.
How Lake Jackson compares with nearby cities
Lake Jackson ranks 189 of 252 Texas cities for unheated swim months; Clute, Angleton, Freeport nearby get a longer season without a heater.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Clute, TX | 4 mi | 5 | 9 | $181 |
| Angleton, TX | 8 mi | 5 | 9 | $193 |
| Freeport, TX | 9 mi | 5 | 9 | $176 |
| Iowa Colony, TX | 27 mi | 5 | 9 | $184 |
| Alvin, TX | 29 mi | 4 | 9 | $235 |
| Manvel, TX | 31 mi | 5 | 9 | $184 |