Girard, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 14 °C (high). Annual precipitation averages 1134.4 Millimeters. Girard 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 | -6.4 °C | 0.9 °C | 87.63 mm |
| February | -6.6 °C | 1.7 °C | 64.26 mm |
| March | -2.7 °C | 5.9 °C | 76.96 mm |
| April | 3.4 °C | 12.7 °C | 95.25 mm |
| May | 9.7 °C | 19 °C | 91.95 mm |
| June | 15.1 °C | 24 °C | 103.63 mm |
| July | 18.1 °C | 26.3 °C | 104.14 mm |
| August | 17.6 °C | 25.8 °C | 87.88 mm |
| September | 13.5 °C | 22.4 °C | 116.33 mm |
| October | 7.6 °C | 15.9 °C | 118.36 mm |
| November | 2.2 °C | 9.6 °C | 93.73 mm |
| December | -2.7 °C | 3.8 °C | 94.23 mm |
| Annual | 5.7 °C | 14 °C | 1134.35 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |