| 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 | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | October 21 - 31 | |
| Average Last Frost Date: | April 1 - 10 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 65n - Chesapeake Rolling Coastal Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 20685 - Saint Leonard, MD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 28 | 36 | 44 | 54 | 63 | 67 | 66 | 60 | 48 | 39 | 31 | 47 |
| Avg Max Temp (°F) | 44 | 47 | 56 | 66 | 75 | 83 | 87 | 85 | 79 | 68 | 58 | 49 | 66 |
| Avg Precip (In.) | 3.82 | 3.14 | 4.3 | 3.34 | 4.26 | 3.87 | 4.3 | 3.98 | 4.15 | 3.55 | 3.38 | 3.36 | 45.46 |