Glen Campbell, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.2 °F (low) to 58.5 °F (high). Annual precipitation averages 47.6 Inches. Glen Campbell is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.5 °F | 33.4 °F | 3.81 in. |
| February | 18.5 °F | 36.5 °F | 2.92 in. |
| March | 25.3 °F | 45.4 °F | 3.86 in. |
| April | 35.8 °F | 59.3 °F | 4.07 in. |
| May | 46.0 °F | 69.8 °F | 4.29 in. |
| June | 54.9 °F | 77.1 °F | 4.58 in. |
| July | 58.9 °F | 80.8 °F | 4.57 in. |
| August | 57.4 °F | 79.7 °F | 4.26 in. |
| September | 50.7 °F | 73.0 °F | 4.22 in. |
| October | 39.6 °F | 61.2 °F | 3.43 in. |
| November | 30.3 °F | 48.6 °F | 3.75 in. |
| December | 23.3 °F | 37.7 °F | 3.82 in. |
| Annual | 38.2 °F | 58.5 °F | 47.58 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |