Glenburn, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.2 °F (low) to 58.3 °F (high). Annual precipitation averages 44.8 Inches. Glenburn is located in USDA Plant Hardiness Zone 6a. 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 | 15.3 °F | 32.9 °F | 3.06 in. |
| February | 16.2 °F | 35.6 °F | 2.42 in. |
| March | 24.1 °F | 44.0 °F | 3.21 in. |
| April | 34.4 °F | 58.0 °F | 3.78 in. |
| May | 45.2 °F | 69.3 °F | 3.92 in. |
| June | 54.4 °F | 77.3 °F | 4.85 in. |
| July | 58.7 °F | 81.8 °F | 4.44 in. |
| August | 57.1 °F | 79.9 °F | 4.32 in. |
| September | 49.9 °F | 73.1 °F | 4.23 in. |
| October | 38.9 °F | 60.7 °F | 4.25 in. |
| November | 30.0 °F | 48.9 °F | 3.03 in. |
| December | 21.9 °F | 38.0 °F | 3.3 in. |
| Annual | 37.2 °F | 58.3 °F | 44.81 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |