McAdoo, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.8 °F (low) to 57.1 °F (high). Annual precipitation averages 56.2 Inches. McAdoo is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.1 °F | 32.5 °F | 4.03 in. |
| February | 18.3 °F | 35.3 °F | 3.1 in. |
| March | 25.4 °F | 43.7 °F | 4.25 in. |
| April | 36.2 °F | 56.9 °F | 4.82 in. |
| May | 46.8 °F | 67.4 °F | 4.69 in. |
| June | 55.8 °F | 75.1 °F | 5.9 in. |
| July | 60.5 °F | 79.6 °F | 5.06 in. |
| August | 58.7 °F | 77.9 °F | 4.89 in. |
| September | 51.9 °F | 71.3 °F | 5.45 in. |
| October | 41.1 °F | 60.1 °F | 5.33 in. |
| November | 31.2 °F | 47.7 °F | 4.11 in. |
| December | 22.7 °F | 37.4 °F | 4.54 in. |
| Annual | 38.8 °F | 57.1 °F | 56.17 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 |