Mars, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.5 °F (low) to 61.3 °F (high). Annual precipitation averages 41.9 Inches. Mars is located in USDA Plant Hardiness Zone 6b. 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 | 20.7 °F | 36.4 °F | 3.46 in. |
| February | 21.8 °F | 39.5 °F | 2.64 in. |
| March | 28.6 °F | 48.6 °F | 3.07 in. |
| April | 39.0 °F | 62.3 °F | 3.62 in. |
| May | 49.5 °F | 71.9 °F | 3.88 in. |
| June | 58.4 °F | 79.8 °F | 4.24 in. |
| July | 62.2 °F | 83.3 °F | 4.16 in. |
| August | 60.8 °F | 82.1 °F | 3.48 in. |
| September | 53.9 °F | 75.9 °F | 3.78 in. |
| October | 42.9 °F | 63.6 °F | 3.16 in. |
| November | 33.5 °F | 51.5 °F | 3.13 in. |
| December | 26.1 °F | 40.9 °F | 3.27 in. |
| Annual | 41.5 °F | 61.3 °F | 41.89 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |