Waller, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.4 °C (low) to 14.4 °C (high). Annual precipitation averages 1221 Millimeters. Waller 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.7 °C | 0.7 °C | 86.61 mm |
| February | -7.9 °C | 2.2 °C | 64.26 mm |
| March | -3.9 °C | 6.9 °C | 83.82 mm |
| April | 2.1 °C | 14.2 °C | 104.39 mm |
| May | 7.9 °C | 20.3 °C | 113.79 mm |
| June | 12.8 °C | 24.6 °C | 117.09 mm |
| July | 15.1 °C | 27 °C | 120.4 mm |
| August | 14.2 °C | 26.1 °C | 117.35 mm |
| September | 10.3 °C | 22.3 °C | 125.22 mm |
| October | 4.4 °C | 15.7 °C | 108.2 mm |
| November | -0.6 °C | 9.2 °C | 85.09 mm |
| December | -5.1 °C | 3.3 °C | 94.74 mm |
| Annual | 3.4 °C | 14.4 °C | 1220.96 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |