Ranked from NOAA 1991-2020 Climate Normals
Highest Cooling Demand in Maryland
Cooling degree days are the mirror of heating degree days: how far and how long the temperature sits above 65°F. In the counties at the top of this list, cooling is the largest single line on the summer electricity bill. Figures are NOAA 1991-2020 Climate Normals from the weather station nearest each county seat, so they describe a thirty-year average rather than any single year.
Maryland ranked
| # | County | Cooling degree days | Summer high | Monthly to own |
|---|---|---|---|---|
| 1 | Baltimore County | 1,749 | 90.1°F | $2,690 |
| 2 | Baltimore city | 1,749 | 90.1°F | $1,945 |
| 3 | Worcester County | 1,588 | 89.3°F | $2,721 |
| 4 | Charles County | 1,512 | 88.0°F | $3,199 |
| 5 | Calvert County | 1,508 | 87.3°F | $3,415 |
| 6 | Dorchester County | 1,508 | 87.3°F | $2,087 |
| 7 | Wicomico County | 1,499 | 88.6°F | $1,978 |
| 8 | St. Mary's County | 1,477 | 87.2°F | $3,060 |
| 9 | Talbot County | 1,473 | 88.1°F | $3,043 |
| 10 | Anne Arundel County | 1,436 | 86.0°F | $3,478 |
| 11 | Queen Anne's County | 1,436 | 86.0°F | $3,396 |
| 12 | Frederick County | 1,397 | 88.6°F | $3,450 |
| 13 | Caroline County | 1,396 | 87.7°F | $2,226 |
| 14 | Somerset County | 1,358 | 86.1°F | $1,456 |
| 15 | Howard County | 1,322 | 88.8°F | $4,538 |
| 16 | Kent County | 1,284 | 86.6°F | $2,480 |
| 17 | Prince George's County | 1,284 | 88.0°F | $3,252 |
| 18 | Montgomery County | 1,279 | 87.1°F | $4,663 |
| 19 | Washington County | 1,248 | 87.3°F | $2,242 |
| 20 | Cecil County | 1,171 | 86.4°F | $2,524 |
| 21 | Harford County | 1,171 | 86.4°F | $2,911 |
| 22 | Allegany County | 1,042 | 87.1°F | $1,359 |
| 23 | Carroll County | 853 | 85.2°F | $3,196 |
| 24 | Garrett County | 276 | 76.7°F | $1,810 |
Every figure is modelled on the county's own median home with 20% down at 7.03%. Property tax and electricity are county and state specific; homeowners insurance uses the NAIC average premium for that state, which ranges from 0.16% of home value in Hawaii to 1.16% in Oklahoma. Maintenance and water are national estimates. Full methodology.
Nationwide
Highest Cooling Demand across all 3,133 US counties · Every county in Maryland