| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| 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: | 63f - Delmarva Uplands |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 21811 - Berlin, MD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 29 | 35 | 43 | 53 | 62 | 67 | 66 | 61 | 49 | 40 | 32 | 47 |
| Avg Max Temp (°F) | 45 | 48 | 55 | 64 | 72 | 81 | 85 | 84 | 79 | 69 | 59 | 50 | 66 |
| Avg Precip (In.) | 4.02 | 3.33 | 4.58 | 3.33 | 3.7 | 3.34 | 4.25 | 5.16 | 3.74 | 3.4 | 3.25 | 3.44 | 45.54 |