Ranked from NOAA 1991-2020 Climate Normals
Hottest Summers in Maryland
Average daily high in the hottest month of the year, by county. Read it next to the cooling degree days in the same row: the two together are what the summer electricity bill is actually made of. 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 | Summer high | Cooling degree days | Monthly to own |
|---|---|---|---|---|
| 1 | Baltimore County | 90.1°F | 1,749 | $2,690 |
| 2 | Baltimore city | 90.1°F | 1,749 | $1,945 |
| 3 | Worcester County | 89.3°F | 1,588 | $2,721 |
| 4 | Howard County | 88.8°F | 1,322 | $4,538 |
| 5 | Frederick County | 88.6°F | 1,397 | $3,450 |
| 6 | Wicomico County | 88.6°F | 1,499 | $1,978 |
| 7 | Talbot County | 88.1°F | 1,473 | $3,043 |
| 8 | Charles County | 88.0°F | 1,512 | $3,199 |
| 9 | Prince George's County | 88.0°F | 1,284 | $3,252 |
| 10 | Caroline County | 87.7°F | 1,396 | $2,226 |
| 11 | Calvert County | 87.3°F | 1,508 | $3,415 |
| 12 | Dorchester County | 87.3°F | 1,508 | $2,087 |
| 13 | Washington County | 87.3°F | 1,248 | $2,242 |
| 14 | St. Mary's County | 87.2°F | 1,477 | $3,060 |
| 15 | Allegany County | 87.1°F | 1,042 | $1,359 |
| 16 | Montgomery County | 87.1°F | 1,279 | $4,663 |
| 17 | Kent County | 86.6°F | 1,284 | $2,480 |
| 18 | Cecil County | 86.4°F | 1,171 | $2,524 |
| 19 | Harford County | 86.4°F | 1,171 | $2,911 |
| 20 | Somerset County | 86.1°F | 1,358 | $1,456 |
| 21 | Anne Arundel County | 86.0°F | 1,436 | $3,478 |
| 22 | Queen Anne's County | 86.0°F | 1,436 | $3,396 |
| 23 | Carroll County | 85.2°F | 853 | $3,196 |
| 24 | Garrett County | 76.7°F | 276 | $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
Hottest Summers across all 3,133 US counties · Every county in Maryland