Middleport, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.1 °F (low) to 60.8 °F (high). Annual precipitation averages 52.7 Inches. Middleport is located in USDA Plant Hardiness Zone 6b. 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 | 18.2 °F | 36.0 °F | 3.73 in. |
| February | 19.3 °F | 38.9 °F | 2.94 in. |
| March | 26.8 °F | 47.3 °F | 4.07 in. |
| April | 37.1 °F | 60.5 °F | 4.35 in. |
| May | 46.8 °F | 71.0 °F | 4.33 in. |
| June | 56.0 °F | 79.0 °F | 5.26 in. |
| July | 60.4 °F | 83.7 °F | 4.94 in. |
| August | 58.6 °F | 82.0 °F | 4.65 in. |
| September | 51.4 °F | 75.2 °F | 5.31 in. |
| October | 40.2 °F | 63.5 °F | 4.89 in. |
| November | 31.0 °F | 51.2 °F | 3.94 in. |
| December | 23.8 °F | 40.8 °F | 4.26 in. |
| Annual | 39.1 °F | 60.8 °F | 52.67 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |