Birchwood Lakes, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.3 °F (low) to 58.5 °F (high). Annual precipitation averages 49.6 Inches. Birchwood Lakes is located in USDA Plant Hardiness Zone 6b. 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 | 16.8 °F | 33.5 °F | 3.31 in. |
| February | 18.4 °F | 36.6 °F | 2.7 in. |
| March | 25.9 °F | 44.5 °F | 3.98 in. |
| April | 37.3 °F | 57.9 °F | 4.04 in. |
| May | 47.4 °F | 68.9 °F | 4.03 in. |
| June | 56.3 °F | 76.8 °F | 5.05 in. |
| July | 61.0 °F | 81.3 °F | 4.77 in. |
| August | 59.7 °F | 79.4 °F | 4.77 in. |
| September | 52.9 °F | 72.9 °F | 4.93 in. |
| October | 41.6 °F | 61.1 °F | 4.64 in. |
| November | 31.0 °F | 50.3 °F | 3.45 in. |
| December | 23.3 °F | 38.7 °F | 3.95 in. |
| Annual | 39.3 °F | 58.5 °F | 49.62 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |