Pool swim season in Belton, MO
Swim season in Belton without a heater, and with one
An unheated pool in Belton reaches 78°F in Aug, about 1 month a year. The air allows up to 5 swimmable months with a heater (May to Sep).
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What each heater buys you in Belton
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 1 | Aug | $0 | $0 |
| Solar cover only | 3 | Jul to Sep | $0 | $50 |
| Solar panels + cover | 4 | Jun to Sep | $0 | $283 |
| Heat pump + cover | 5 | May to Sep | $144 | $694 |
| Gas heater + cover | 5 | May to Sep | $302 | $727 |
For a 450 sq ft pool held at 80°F, at MO prices of 14.3¢/kWh electricity and $15/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Belton
Solar panels + cover: 4 of 5 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 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: Lees Summit Reed Wr, 11.3 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Belton 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 | 36° | 27° | 2.3 | 29° | 35° | – | – |
| Feb | 42° | 32° | 3.0 | 29° | 35° | – | – |
| Mar | 53° | 43° | 4.0 | 38° | 44° | – | – |
| Apr | 62° | 53° | 5.0 | 50° | 56° | – | – |
| May | 73° | 64° | 5.7 | 61° | 67° | $112 | $230 |
| Jun | 81° | 72° | 6.6 | 72° | 78° | $19 | $44 |
| Jul | 86° | 77° | 6.5 | 78° | 84° | – | – |
| Aug | 85° | 75° | 5.7 | 78° | 84° | – | – |
| Sep | 76° | 66° | 4.8 | 72° | 78° | $13 | $28 |
| Oct | 66° | 56° | 3.5 | 61° | 67° | – | – |
| Nov | 52° | 42° | 2.5 | 48° | 54° | – | – |
| Dec | 41° | 32° | 2.0 | 36° | 42° | – | – |
Heating costs most in May (about $112 with a heat pump, $230 with gas). Sunshine peaks in Jun at 6.6 kWh/m²/day (NASA satellite data, 35.5 km grid cell). Highlighted months are swimmable with no heater.
How Belton compares with nearby cities
Belton ranks 77 of 80 Missouri cities for unheated swim months; Grandview, Leawood, Overland Park nearby get a longer season without a heater.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Raymore, MO | 4 mi | 1 | 5 | $144 |
| Grandview, MO | 4 mi | 2 | 5 | $93 |
| Leawood, KS | 8 mi | 2 | 5 | $112 |
| Overland Park, KS | 10 mi | 2 | 5 | $108 |
| Lee's Summit, MO | 11 mi | 2 | 5 | $93 |
| Raytown, MO | 13 mi | 2 | 5 | $93 |