Pool swim season in Collierville, TN
When can you swim in an outdoor pool in Collierville, TN?
An unheated pool in Collierville reaches 78°F in Jul to Sep, about 3 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 Collierville pool, side by side
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 3 | Jul to Sep | $0 | $0 |
| Solar cover only | 4 | Jun to Sep | $0 | $50 |
| Solar panels + cover | 6 | May to Oct | $0 | $283 |
| Heat pump + cover | 7 | Apr to Oct | $216 | $766 |
| Gas heater + cover | 7 | Apr to Oct | $362 | $787 |
For a 450 sq ft pool held at 80°F, at TN prices of 13.8¢/kWh electricity and $12/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Collierville
Solar panels + cover: 6 of 7 possible months for about $283 a year all-in, which works out near $94 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: Collierville, 2.7 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Collierville 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 | 50° | 40° | 2.4 | 41° | 47° | – | – |
| Feb | 55° | 44° | 3.0 | 42° | 48° | – | – |
| Mar | 64° | 52° | 4.1 | 49° | 55° | – | – |
| Apr | 73° | 61° | 5.3 | 59° | 65° | $127 | $207 |
| May | 82° | 70° | 6.0 | 69° | 75° | $40 | $74 |
| Jun | 88° | 77° | 6.6 | 77° | 83° | – | – |
| Jul | 91° | 81° | 6.3 | 83° | 89° | – | – |
| Aug | 91° | 80° | 5.8 | 83° | 89° | – | – |
| Sep | 85° | 73° | 4.9 | 78° | 84° | – | – |
| Oct | 75° | 62° | 3.8 | 68° | 74° | $49 | $81 |
| Nov | 63° | 51° | 2.8 | 56° | 62° | – | – |
| Dec | 54° | 43° | 2.1 | 46° | 52° | – | – |
Heating costs most in Apr (about $127 with a heat pump, $207 with gas). Sunshine peaks in Jun at 6.6 kWh/m²/day (NASA satellite data, 53.3 km grid cell). Highlighted months are swimmable with no heater.
How Collierville compares with nearby cities
Collierville ranks 7 of 65 Tennessee cities for unheated swim months; Germantown, Olive Branch nearby get a longer season without a heater.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Germantown, TN | 5 mi | 4 | 7 | $185 |
| Olive Branch, MS | 10 mi | 4 | 7 | $216 |
| Arlington, TN | 14 mi | 3 | 7 | $217 |
| Bartlett, TN | 15 mi | 3 | 7 | $217 |
| Lakeland, TN | 15 mi | 3 | 7 | $217 |
| Oakland, TN | 15 mi | 3 | 7 | $216 |