Pool swim season in Excelsior Springs, MO

Swim season in Excelsior Springs without a heater, and with one

An unheated pool in Excelsior Springs reaches 78°F in Jul to Aug, about 2 months a year. The air allows up to 5 swimmable months with a heater (May to Sep).

1. J
2. F
3. M
4. A
5. M
6. J
7. J
8. A
9. S
10. O
11. N
12. D

What each heater buys you in Excelsior Springs

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 Excelsior Springs

Solar cover only: 4 of 5 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: Kearney 3E, 5.1 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.

Excelsior Springs month by month: air, sun and pool water

Heating costs most in May (about $106 with a heat pump, $219 with gas). Sunshine peaks in Jun at 6.5 kWh/m²/day (NASA satellite data, 28.5 km grid cell). Highlighted months are swimmable with no heater.

How Excelsior Springs compares with nearby cities

Excelsior Springs ranks 68 of 80 Missouri cities for unheated swim months, and no nearby city gets a longer unheated season.