Pool swim season in Hyattsville, MD
Hyattsville, MD: how long the pool season really is
An unheated pool in Hyattsville 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).
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What each heater buys you in Hyattsville
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 2 | Jul to Aug | $0 | $0 |
| Solar cover only | 4 | Jun to Sep | $0 | $50 |
| Solar panels + cover | 5 | May to Sep | $0 | $283 |
| Heat pump + cover | 5 | May to Sep | $113 | $663 |
| Gas heater + cover | 5 | May to Sep | $175 | $600 |
For a 450 sq ft pool held at 80°F, at MD prices of 21.3¢/kWh electricity and $16/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Hyattsville
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 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: Natl Arboretum Dc, 3.4 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Hyattsville 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 | 45° | 36° | 2.2 | 38° | 44° | – | – |
| Feb | 48° | 39° | 3.0 | 37° | 43° | – | – |
| Mar | 56° | 46° | 4.0 | 43° | 49° | – | – |
| Apr | 68° | 57° | 5.1 | 54° | 60° | – | – |
| May | 77° | 67° | 5.8 | 65° | 71° | $113 | $175 |
| Jun | 85° | 76° | 6.4 | 75° | 81° | – | – |
| Jul | 90° | 80° | 6.3 | 81° | 87° | – | – |
| Aug | 88° | 79° | 5.6 | 82° | 88° | – | – |
| Sep | 82° | 72° | 4.5 | 77° | 83° | – | – |
| Oct | 70° | 59° | 3.4 | 66° | 72° | – | – |
| Nov | 58° | 49° | 2.5 | 54° | 60° | – | – |
| Dec | 49° | 41° | 1.9 | 44° | 50° | – | – |
Heating costs most in May (about $113 with a heat pump, $175 with gas). Sunshine peaks in Jun at 6.4 kWh/m²/day (NASA satellite data, 64.7 km grid cell). Highlighted months are swimmable with no heater.
How Hyattsville compares with nearby cities
Hyattsville ranks 2 of 23 Maryland cities for unheated swim months, and no nearby city gets a longer unheated season.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| College Park, MD | 3 mi | 2 | 5 | $173 |
| Takoma Park, MD | 3 mi | 2 | 5 | $115 |
| New Carrollton, MD | 4 mi | 1 | 5 | $204 |
| Greenbelt, MD | 4 mi | 2 | 5 | $173 |
| Washington, DC | 5 mi | 2 | 5 | $134 |
| Laurel, MD | 11 mi | 2 | 5 | $143 |