Indiana, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.4 °C (low) to 15.7 °C (high). Annual precipitation averages 1209.5 Millimeters. Indiana 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 | -7.1 °C | 2 °C | 95 mm |
| February | -6.5 °C | 3.7 °C | 73.66 mm |
| March | -2.7 °C | 8.7 °C | 96.01 mm |
| April | 3 °C | 16.2 °C | 101.85 mm |
| May | 8.8 °C | 21.7 °C | 107.95 mm |
| June | 13.6 °C | 25.8 °C | 121.41 mm |
| July | 15.8 °C | 27.9 °C | 127.25 mm |
| August | 15.1 °C | 27.2 °C | 109.22 mm |
| September | 11.4 °C | 23.7 °C | 107.7 mm |
| October | 5.2 °C | 17.2 °C | 87.63 mm |
| November | -0.1 °C | 10.4 °C | 92.96 mm |
| December | -4 °C | 4.4 °C | 88.9 mm |
| Annual | 4.4 °C | 15.7 °C | 1209.54 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 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 |