| 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 6b: -5F to 0F | |
| 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: | 67a - Northern Limestone/Dolomite Valleys | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 21722 - Clear Spring, MD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 23 | 30 | 39 | 48 | 57 | 62 | 60 | 53 | 41 | 33 | 25 | 41 |
| Avg Max Temp (°F) | 39 | 43 | 53 | 64 | 74 | 82 | 87 | 85 | 78 | 66 | 54 | 43 | 64 |
| Avg Precip (In.) | 2.86 | 2.43 | 3.42 | 3.39 | 4.14 | 3.76 | 3.61 | 3.51 | 3.5 | 3.34 | 3.26 | 2.89 | 40.12 |