| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F 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 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 67b - Northern Shale Valleys | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 17842 - Middleburg, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 20 | 28 | 37 | 47 | 56 | 61 | 59 | 52 | 40 | 32 | 24 | 39 |
| Avg Max Temp (°F) | 36 | 40 | 50 | 63 | 73 | 81 | 85 | 83 | 75 | 64 | 52 | 40 | 62 |
| Avg Precip (In.) | 3.1 | 2.48 | 3.27 | 3.4 | 3.99 | 4.84 | 3.74 | 3.92 | 3.99 | 3.25 | 3.5 | 3.22 | 42.69 |