New Brighton, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.4 °C (low) to 16.4 °C (high). Annual precipitation averages 1014.5 Millimeters. New Brighton 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.1 °C | 2.6 °C | 77.72 mm |
| February | -5.6 °C | 4.1 °C | 57.4 mm |
| March | -1.5 °C | 9.2 °C | 77.72 mm |
| April | 3.9 °C | 16.7 °C | 94.23 mm |
| May | 9.7 °C | 22.2 °C | 95.5 mm |
| June | 14.6 °C | 26.6 °C | 107.44 mm |
| July | 16.9 °C | 28.8 °C | 99.06 mm |
| August | 16.2 °C | 28.1 °C | 87.63 mm |
| September | 12.5 °C | 24.6 °C | 88.39 mm |
| October | 6.5 °C | 17.8 °C | 77.98 mm |
| November | 1.1 °C | 10.8 °C | 73.66 mm |
| December | -3.1 °C | 4.9 °C | 77.72 mm |
| Annual | 5.4 °C | 16.4 °C | 1014.45 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |