Nittany, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4 °C (low) to 15.7 °C (high). Annual precipitation averages 1089.2 Millimeters. Nittany 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 | -7.7 °C | 1.4 °C | 74.42 mm |
| February | -7.1 °C | 3.2 °C | 59.18 mm |
| March | -3.2 °C | 8.3 °C | 84.33 mm |
| April | 2.6 °C | 15.9 °C | 90.93 mm |
| May | 8.4 °C | 22 °C | 104.9 mm |
| June | 13.6 °C | 26.3 °C | 100.08 mm |
| July | 15.8 °C | 28.7 °C | 107.19 mm |
| August | 14.8 °C | 27.7 °C | 107.7 mm |
| September | 10.8 °C | 23.6 °C | 108.46 mm |
| October | 4.7 °C | 16.9 °C | 94.74 mm |
| November | -0.6 °C | 10 °C | 76.96 mm |
| December | -4.5 °C | 3.8 °C | 80.26 mm |
| Annual | 4 °C | 15.7 °C | 1089.15 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 |