| 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. 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: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 17356 - Red Lion, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 22 | 30 | 39 | 49 | 58 | 62 | 60 | 54 | 42 | 33 | 25 | 41 |
| Avg Max Temp (°F) | 39 | 43 | 54 | 65 | 75 | 83 | 87 | 85 | 78 | 67 | 55 | 44 | 64 |
| Avg Precip (In.) | 3.49 | 2.72 | 3.63 | 3.49 | 4.29 | 4.13 | 3.8 | 3.41 | 4.08 | 3.26 | 3.47 | 3.26 | 43.05 |