South Waverly, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.7 °C (low) to 15.1 °C (high). Annual precipitation averages 923 Millimeters. South Waverly is located in USDA Plant Hardiness Zone 6a. 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 | -9.2 °C | 0.9 °C | 57.15 mm |
| February | -8.9 °C | 2.2 °C | 46.48 mm |
| March | -4.9 °C | 6.9 °C | 70.87 mm |
| April | 0.8 °C | 14.7 °C | 87.12 mm |
| May | 7.1 °C | 21.4 °C | 74.93 mm |
| June | 12.2 °C | 26.1 °C | 102.87 mm |
| July | 14.6 °C | 28.5 °C | 89.15 mm |
| August | 13.8 °C | 27.7 °C | 83.82 mm |
| September | 9.9 °C | 23.8 °C | 99.31 mm |
| October | 3.6 °C | 16.5 °C | 90.68 mm |
| November | -1.4 °C | 9.5 °C | 61.72 mm |
| December | -5.4 °C | 3.5 °C | 58.93 mm |
| Annual | 2.7 °C | 15.1 °C | 923.03 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |