Plymptonville, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.4 °F (low) to 58.1 °F (high). Annual precipitation averages 44.5 Inches. Plymptonville 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 | 16.4 °F | 32.9 °F | 3.31 in. |
| February | 17.5 °F | 35.8 °F | 2.66 in. |
| March | 24.6 °F | 44.9 °F | 3.33 in. |
| April | 35.1 °F | 58.7 °F | 3.86 in. |
| May | 45.6 °F | 69.5 °F | 4.15 in. |
| June | 53.8 °F | 76.8 °F | 4.98 in. |
| July | 58.1 °F | 80.9 °F | 3.83 in. |
| August | 56.7 °F | 79.5 °F | 3.73 in. |
| September | 49.6 °F | 72.6 °F | 4.06 in. |
| October | 38.9 °F | 60.7 °F | 3.69 in. |
| November | 29.6 °F | 48.3 °F | 3.45 in. |
| December | 22.4 °F | 37.1 °F | 3.44 in. |
| Annual | 37.4 °F | 58.1 °F | 44.49 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |