Swartzville, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.4 °F (low) to 62.4 °F (high). Annual precipitation averages 48 Inches. Swartzville 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.3 °F | 38.5 °F | 3.18 in. |
| February | 23.3 °F | 41.0 °F | 2.69 in. |
| March | 30.7 °F | 49.6 °F | 3.96 in. |
| April | 41.1 °F | 62.3 °F | 3.82 in. |
| May | 50.7 °F | 71.8 °F | 3.96 in. |
| June | 60.1 °F | 80.3 °F | 4.51 in. |
| July | 65.0 °F | 84.5 °F | 4.71 in. |
| August | 63.4 °F | 82.9 °F | 4.39 in. |
| September | 56.5 °F | 76.4 °F | 4.91 in. |
| October | 45.0 °F | 64.6 °F | 4.67 in. |
| November | 35.5 °F | 53.5 °F | 3.38 in. |
| December | 27.6 °F | 43.2 °F | 3.79 in. |
| Annual | 43.4 °F | 62.4 °F | 47.97 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |