Millerton, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.8 °F (low) to 58.1 °F (high). Annual precipitation averages 37.8 Inches. Millerton is located in USDA Plant Hardiness Zone 5b. 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 | 14.2 °F | 32.3 °F | 2.3 in. |
| February | 15.1 °F | 35.2 °F | 1.85 in. |
| March | 22.1 °F | 43.6 °F | 2.73 in. |
| April | 32.5 °F | 57.5 °F | 3.35 in. |
| May | 43.5 °F | 69.8 °F | 3.21 in. |
| June | 52.8 °F | 77.6 °F | 4.13 in. |
| July | 57.0 °F | 81.8 °F | 3.78 in. |
| August | 55.8 °F | 80.3 °F | 3.7 in. |
| September | 48.8 °F | 73.4 °F | 4.0 in. |
| October | 38.1 °F | 60.8 °F | 3.59 in. |
| November | 28.9 °F | 47.5 °F | 2.62 in. |
| December | 21.3 °F | 37.0 °F | 2.49 in. |
| Annual | 35.8 °F | 58.1 °F | 37.75 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°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 |