Cheswick, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 16.8 °C (high). Annual precipitation averages 1099.1 Millimeters. Cheswick 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.9 °C | 3.1 °C | 88.9 mm |
| February | -5.3 °C | 4.6 °C | 67.82 mm |
| March | -1.6 °C | 9.6 °C | 83.57 mm |
| April | 4.1 °C | 17.1 °C | 89.66 mm |
| May | 10.2 °C | 22.7 °C | 101.35 mm |
| June | 15.2 °C | 27.1 °C | 114.3 mm |
| July | 17.4 °C | 29.3 °C | 112.52 mm |
| August | 16.7 °C | 28.5 °C | 93.98 mm |
| September | 12.8 °C | 24.8 °C | 98.04 mm |
| October | 6.5 °C | 17.8 °C | 82.04 mm |
| November | 1 °C | 11.1 °C | 80.52 mm |
| December | -2.9 °C | 5.4 °C | 86.36 mm |
| Annual | 5.7 °C | 16.8 °C | 1099.06 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |