Freeport, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.4 °F (low) to 62.2 °F (high). Annual precipitation averages 43.2 Inches. Freeport is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.7 °F | 37.3 °F | 3.18 in. |
| February | 21.6 °F | 40.3 °F | 2.57 in. |
| March | 28.5 °F | 49.4 °F | 3.17 in. |
| April | 38.6 °F | 63.1 °F | 3.76 in. |
| May | 49.4 °F | 73.1 °F | 4.05 in. |
| June | 58.5 °F | 80.7 °F | 4.56 in. |
| July | 62.4 °F | 84.4 °F | 4.56 in. |
| August | 61.1 °F | 83.2 °F | 3.89 in. |
| September | 54.0 °F | 76.7 °F | 3.99 in. |
| October | 42.8 °F | 64.2 °F | 3.11 in. |
| November | 33.3 °F | 52.0 °F | 3.19 in. |
| December | 26.1 °F | 41.4 °F | 3.17 in. |
| Annual | 41.4 °F | 62.2 °F | 43.2 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |