Homewood, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.9 °C (low) to 16.1 °C (high). Annual precipitation averages 1023.9 Millimeters. Homewood is located in USDA Plant Hardiness Zone 6b. 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 | -6.7 °C | 2.2 °C | 77.98 mm |
| February | -6.1 °C | 3.8 °C | 57.66 mm |
| March | -2.1 °C | 9 °C | 78.23 mm |
| April | 3.5 °C | 16.4 °C | 95.25 mm |
| May | 9.3 °C | 22 °C | 95.76 mm |
| June | 14.2 °C | 26.4 °C | 108.2 mm |
| July | 16.4 °C | 28.6 °C | 100.84 mm |
| August | 15.6 °C | 27.9 °C | 88.65 mm |
| September | 11.8 °C | 24.3 °C | 89.41 mm |
| October | 5.8 °C | 17.6 °C | 78.99 mm |
| November | 0.6 °C | 10.7 °C | 74.42 mm |
| December | -3.6 °C | 4.7 °C | 78.49 mm |
| Annual | 4.9 °C | 16.1 °C | 1023.88 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |