| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 64d - Piedmont Limestone/Dolomite Lowlands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 21793 - Walkersville, MD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 24 | 32 | 41 | 51 | 60 | 64 | 63 | 55 | 43 | 35 | 27 | 43 |
| Avg Max Temp (°F) | 40 | 44 | 54 | 66 | 75 | 83 | 87 | 85 | 78 | 67 | 55 | 45 | 65 |
| Avg Precip (In.) | 3.35 | 2.69 | 3.71 | 3.46 | 4.41 | 4.07 | 3.65 | 3.25 | 4.05 | 3.5 | 3.43 | 3.21 | 42.79 |