| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 64d - Piedmont Limestone/Dolomite Lowlands | |
| Current Drought Status: | Severe Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 17543 - Lititz, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 22 | 30 | 39 | 49 | 59 | 63 | 61 | 54 | 42 | 34 | 26 | 42 |
| Avg Max Temp (°F) | 37 | 41 | 51 | 62 | 73 | 81 | 85 | 83 | 76 | 65 | 53 | 42 | 62 |
| Avg Precip (In.) | 3.38 | 2.51 | 3.43 | 3.46 | 4.32 | 4.25 | 4.44 | 3.44 | 4.18 | 3.37 | 3.52 | 3.2 | 43.49 |