Brookville, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.3 °F (low) to 59 °F (high). Annual precipitation averages 46.8 Inches. Brookville is located in USDA Plant Hardiness Zone 6a. 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 | 17.1 °F | 33.8 °F | 3.7 in. |
| February | 17.7 °F | 36.7 °F | 2.71 in. |
| March | 24.4 °F | 45.7 °F | 3.6 in. |
| April | 34.3 °F | 59.7 °F | 4.09 in. |
| May | 44.9 °F | 70.5 °F | 3.99 in. |
| June | 53.8 °F | 77.6 °F | 4.92 in. |
| July | 57.8 °F | 81.1 °F | 4.92 in. |
| August | 56.5 °F | 80.5 °F | 4.07 in. |
| September | 49.7 °F | 73.7 °F | 4.09 in. |
| October | 39.0 °F | 61.8 °F | 3.42 in. |
| November | 29.8 °F | 48.8 °F | 3.48 in. |
| December | 23.1 °F | 38.0 °F | 3.76 in. |
| Annual | 37.3 °F | 59 °F | 46.75 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 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 |