| 2023 Hardiness Zone: | 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: | 64a - Triassic Lowlands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 17339 - Lewisberry, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 23 | 31 | 40 | 50 | 60 | 65 | 63 | 55 | 43 | 35 | 26 | 43 |
| Avg Max Temp (°F) | 38 | 42 | 52 | 63 | 73 | 81 | 86 | 84 | 77 | 65 | 53 | 42 | 63 |
| Avg Precip (In.) | 3.31 | 2.81 | 3.53 | 3.43 | 4.36 | 4.07 | 3.5 | 3.27 | 3.9 | 3.17 | 3.46 | 3.16 | 41.95 |