Atkinson Mills, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.9 °F (low) to 60.8 °F (high). Annual precipitation averages 41.2 Inches. Atkinson Mills is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.2 °F | 36.1 °F | 2.83 in. |
| February | 21.3 °F | 39.2 °F | 2.34 in. |
| March | 28.1 °F | 47.8 °F | 3.37 in. |
| April | 38.6 °F | 61.1 °F | 3.59 in. |
| May | 48.8 °F | 71.2 °F | 3.99 in. |
| June | 57.8 °F | 79.1 °F | 4.0 in. |
| July | 62.0 °F | 83.5 °F | 3.6 in. |
| August | 60.4 °F | 81.9 °F | 3.65 in. |
| September | 53.2 °F | 75.0 °F | 4.06 in. |
| October | 42.1 °F | 63.2 °F | 3.63 in. |
| November | 32.8 °F | 51.3 °F | 2.95 in. |
| December | 25.4 °F | 40.3 °F | 3.19 in. |
| Annual | 40.9 °F | 60.8 °F | 41.2 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |