Old Forge, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.2 °F (low) to 60.3 °F (high). Annual precipitation averages 40.2 Inches. Old Forge is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.7 °F | 34.6 °F | 2.47 in. |
| February | 19.7 °F | 37.3 °F | 2.03 in. |
| March | 27.2 °F | 46.1 °F | 2.72 in. |
| April | 37.9 °F | 59.9 °F | 3.49 in. |
| May | 48.3 °F | 71.3 °F | 3.26 in. |
| June | 57.1 °F | 79.4 °F | 4.54 in. |
| July | 61.4 °F | 84.1 °F | 4.45 in. |
| August | 59.7 °F | 82.1 °F | 4.31 in. |
| September | 52.7 °F | 75.2 °F | 3.88 in. |
| October | 41.7 °F | 62.6 °F | 3.77 in. |
| November | 32.8 °F | 50.7 °F | 2.55 in. |
| December | 25.1 °F | 39.9 °F | 2.75 in. |
| Annual | 40.2 °F | 60.3 °F | 40.22 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |