| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°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: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 17065 - Mount Holly Springs, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 22 | 30 | 39 | 49 | 58 | 63 | 62 | 55 | 43 | 34 | 25 | 42 |
| Avg Max Temp (°F) | 37 | 40 | 50 | 62 | 72 | 81 | 85 | 84 | 76 | 65 | 52 | 41 | 62 |
| Avg Precip (In.) | 3.16 | 2.7 | 3.48 | 3.35 | 4.13 | 3.95 | 3.57 | 3.26 | 3.99 | 3.19 | 3.33 | 3.08 | 41.19 |