Blakely, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.9 °C (low) to 15.5 °C (high). Annual precipitation averages 1080.5 Millimeters. Blakely is located in USDA Plant Hardiness Zone 6b. 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 | -8 °C | 1.3 °C | 72.14 mm |
| February | -7.4 °C | 2.8 °C | 56.39 mm |
| March | -3.2 °C | 7.6 °C | 77.47 mm |
| April | 2.5 °C | 15.3 °C | 92.2 mm |
| May | 8.3 °C | 21.7 °C | 92.46 mm |
| June | 13.3 °C | 26.2 °C | 123.44 mm |
| July | 15.8 °C | 28.7 °C | 110.49 mm |
| August | 14.8 °C | 27.7 °C | 97.54 mm |
| September | 10.8 °C | 23.8 °C | 101.6 mm |
| October | 4.8 °C | 16.9 °C | 104.39 mm |
| November | -0.1 °C | 10.1 °C | 72.64 mm |
| December | -4.4 °C | 4.1 °C | 79.76 mm |
| Annual | 3.9 °C | 15.5 °C | 1080.52 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |