| 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. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 64c - Piedmont Uplands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 17532 - Holtwood, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 25 | 32 | 41 | 51 | 61 | 66 | 64 | 57 | 45 | 36 | 27 | 44 |
| Avg Max Temp (°F) | 38 | 41 | 51 | 62 | 72 | 80 | 85 | 83 | 76 | 65 | 53 | 43 | 62 |
| Avg Precip (In.) | 3.18 | 2.29 | 3.14 | 3.17 | 3.9 | 3.45 | 3.61 | 3.12 | 3.63 | 2.97 | 3.14 | 2.96 | 38.54 |