| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 64c - Piedmont Uplands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 21093 - Lutherville Timonium, MD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 24 | 26 | 33 | 42 | 52 | 61 | 66 | 65 | 58 | 45 | 37 | 28 | 45 |
| Avg Max Temp (°F) | 41 | 45 | 54 | 65 | 74 | 82 | 87 | 85 | 78 | 67 | 56 | 46 | 65 |
| Avg Precip (In.) | 3.75 | 3.16 | 4.38 | 3.66 | 5.07 | 4.03 | 4.24 | 4.2 | 4.53 | 3.75 | 3.81 | 3.73 | 48.33 |