Burnham, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5 °C (low) to 16.5 °C (high). Annual precipitation averages 1091.7 Millimeters. Burnham is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.5 °C | 2.5 °C | 74.68 mm |
| February | -5.8 °C | 4.3 °C | 58.42 mm |
| March | -2.1 °C | 9.3 °C | 88.65 mm |
| April | 3.6 °C | 16.7 °C | 93.22 mm |
| May | 9.2 °C | 22.3 °C | 105.41 mm |
| June | 14.4 °C | 26.8 °C | 102.11 mm |
| July | 16.7 °C | 29.3 °C | 96.01 mm |
| August | 15.9 °C | 28.3 °C | 98.3 mm |
| September | 11.9 °C | 24.4 °C | 113.03 mm |
| October | 5.6 °C | 17.8 °C | 99.06 mm |
| November | 0.4 °C | 11.2 °C | 78.49 mm |
| December | -3.6 °C | 4.9 °C | 84.33 mm |
| Annual | 5 °C | 16.5 °C | 1091.71 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°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 |