| 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 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: | 64b - Trap Rock and Conglomerate Uplands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 17370 - York Haven, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 23 | 32 | 40 | 50 | 60 | 64 | 63 | 56 | 43 | 35 | 27 | 43 |
| Avg Max Temp (°F) | 38 | 41 | 51 | 63 | 73 | 81 | 86 | 84 | 76 | 65 | 53 | 42 | 63 |
| Avg Precip (In.) | 3.4 | 2.71 | 3.35 | 3.34 | 4.13 | 4.04 | 3.59 | 3.1 | 3.88 | 3.05 | 3.31 | 2.99 | 40.92 |