Pool swim season in Huntsville, TX
When can you swim in an outdoor pool in Huntsville, TX?
An unheated pool in Huntsville reaches 78°F in Jun to Sep, about 4 months a year. The air allows up to 7 swimmable months with a heater (Apr to Oct).
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Heater options for a Huntsville 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 | 7 | Apr to Oct | $0 | $283 |
| Heat pump + cover | 7 | Apr to Oct | $93 | $643 |
| Gas heater + cover | 7 | Apr to Oct | $233 | $658 |
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 Huntsville
Solar cover only: 6 of 7 possible months for about $50 a year all-in, which works out near $25 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: Huntsville, 0.9 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Huntsville 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 | 58° | 49° | 2.9 | 50° | 56° | – | – |
| Feb | 62° | 53° | 3.3 | 51° | 57° | – | – |
| Mar | 69° | 59° | 4.4 | 57° | 63° | – | – |
| Apr | 77° | 66° | 5.4 | 65° | 71° | $82 | $203 |
| May | 83° | 73° | 5.9 | 73° | 79° | $11 | $30 |
| Jun | 89° | 80° | 6.4 | 80° | 86° | – | – |
| Jul | 92° | 82° | 6.3 | 84° | 90° | – | – |
| Aug | 93° | 82° | 6.0 | 85° | 91° | – | – |
| Sep | 87° | 77° | 5.1 | 82° | 88° | – | – |
| Oct | 79° | 68° | 4.3 | 74° | 80° | – | – |
| Nov | 68° | 58° | 3.2 | 63° | 69° | – | – |
| Dec | 60° | 51° | 2.6 | 54° | 60° | – | – |
Heating costs most in Apr (about $82 with a heat pump, $203 with gas). Sunshine peaks in Jun at 6.4 kWh/m²/day (NASA satellite data, 22.9 km grid cell). Highlighted months are swimmable with no heater.
How Huntsville compares with nearby cities
Huntsville ranks 237 of 252 Texas cities for unheated swim months, and no nearby city gets a longer unheated season.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Conroe, TX | 26 mi | 4 | 9 | $248 |
| Tomball, TX | 42 mi | 4 | 9 | $238 |
| College Station, TX | 45 mi | 4 | 9 | $267 |
| Bryan, TX | 49 mi | 4 | 9 | $267 |
| Humble, TX | 52 mi | 4 | 9 | $218 |
| Brenham, TX | 63 mi | 4 | 9 | $318 |