Pool swim season in Racine, WI
When can you swim in an outdoor pool in Racine, WI?
An unheated pool in Racine never reaches 78°F in a normal year. It peaks around 73°F in Aug. The air allows up to 4 swimmable months with a heater (Jun to Sep).
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What each heater buys you in Racine
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 0 | no month | $0 | $0 |
| Solar cover only | 1 | Aug | $0 | $50 |
| Solar panels + cover | 3 | Jul to Sep | $0 | $283 |
| Heat pump + cover | 4 | Jun to Sep | $252 | $802 |
| Gas heater + cover | 4 | Jun to Sep | $284 | $709 |
For a 450 sq ft pool held at 80°F, at WI prices of 19.1¢/kWh electricity and $11/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Racine
Solar panels + cover: 3 of 4 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 gas as well as a heat pump: once the purchase price is counted, gas comes out cheaper all-in here (heat pump or gas).
Weather station: Racine Water Treatment Plant, 2.1 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Racine 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 | 30° | 22° | 1.4 | 23° | 29° | – | – |
| Feb | 32° | 25° | 2.2 | 23° | 29° | – | – |
| Mar | 41° | 34° | 3.4 | 30° | 36° | – | – |
| Apr | 51° | 44° | 4.5 | 40° | 46° | – | – |
| May | 61° | 54° | 5.3 | 51° | 57° | – | – |
| Jun | 72° | 64° | 5.9 | 62° | 68° | $137 | $153 |
| Jul | 79° | 71° | 6.1 | 71° | 77° | $35 | $42 |
| Aug | 77° | 70° | 5.2 | 73° | 79° | $11 | $13 |
| Sep | 71° | 63° | 4.2 | 68° | 74° | $69 | $76 |
| Oct | 59° | 51° | 2.7 | 57° | 63° | – | – |
| Nov | 46° | 39° | 1.8 | 44° | 50° | – | – |
| Dec | 35° | 28° | 1.2 | 32° | 38° | – | – |
Heating costs most in Jun (about $137 with a heat pump, $153 with gas). Sunshine peaks in Jul at 6.1 kWh/m²/day (NASA satellite data, 35.9 km grid cell). Highlighted months are swimmable with no heater.
How Racine compares with nearby cities
Racine ranks 48 of 98 Wisconsin cities for unheated swim months, and no nearby city gets a longer unheated season.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Mount Pleasant, WI | 4 mi | 0 | 4 | $184 |
| Caledonia, WI | 6 mi | 0 | 4 | $184 |
| Kenosha, WI | 10 mi | 0 | 4 | $152 |
| Oak Creek, WI | 11 mi | 0 | 4 | $181 |
| South Milwaukee, WI | 13 mi | 0 | 4 | $181 |
| Pleasant Prairie, WI | 14 mi | 0 | 4 | $208 |