| 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: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 64c - Piedmont Uplands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 21217 - Baltimore, MD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 29 | 37 | 46 | 56 | 65 | 70 | 68 | 61 | 49 | 40 | 31 | 48 |
| Avg Max Temp (°F) | 43 | 46 | 55 | 66 | 76 | 85 | 89 | 87 | 80 | 69 | 57 | 47 | 67 |
| Avg Precip (In.) | 3.56 | 3.1 | 4.17 | 3.17 | 4.31 | 3.26 | 4 | 4.1 | 4.14 | 3.27 | 3.53 | 3.68 | 44.29 |