| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F | |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | Nov. 1 - Nov. 10 | |
| Average Last Frost Date: | Apr. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 65n - Chesapeake Rolling Coastal Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 20735 - Clinton, MD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 24 | 27 | 34 | 42 | 52 | 61 | 66 | 64 | 57 | 45 | 36 | 29 | 45 |
| Avg Max Temp (°F) | 44 | 48 | 57 | 67 | 76 | 84 | 88 | 87 | 80 | 69 | 58 | 48 | 67 |
| Avg Precip (In.) | 3.45 | 2.81 | 3.85 | 3.21 | 4.26 | 3.67 | 4.12 | 3.91 | 4.07 | 3.45 | 3.31 | 3.25 | 43.36 |