Atlas, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.5 °F (low) to 59 °F (high). Annual precipitation averages 49.8 Inches. Atlas 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.7 °F | 34.3 °F | 3.61 in. |
| February | 19.1 °F | 37.1 °F | 2.71 in. |
| March | 26.7 °F | 45.8 °F | 3.94 in. |
| April | 37.5 °F | 58.7 °F | 4.16 in. |
| May | 47.5 °F | 69.3 °F | 4.28 in. |
| June | 56.3 °F | 77.1 °F | 4.77 in. |
| July | 60.7 °F | 82.3 °F | 4.65 in. |
| August | 58.9 °F | 80.4 °F | 4.35 in. |
| September | 52.1 °F | 73.6 °F | 5.19 in. |
| October | 41.3 °F | 61.4 °F | 4.67 in. |
| November | 31.8 °F | 49.3 °F | 3.65 in. |
| December | 24.0 °F | 38.9 °F | 3.83 in. |
| Annual | 39.5 °F | 59 °F | 49.81 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |