Chevy Chase Heights, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.3 °C (low) to 15.4 °C (high). Annual precipitation averages 1211.8 Millimeters. Chevy Chase Heights is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.2 °C | 1.7 °C | 95.76 mm |
| February | -6.7 °C | 3.4 °C | 73.66 mm |
| March | -2.8 °C | 8.4 °C | 96.27 mm |
| April | 2.9 °C | 15.8 °C | 102.11 mm |
| May | 8.8 °C | 21.4 °C | 107.7 mm |
| June | 13.4 °C | 25.4 °C | 121.41 mm |
| July | 15.7 °C | 27.5 °C | 127 mm |
| August | 14.9 °C | 26.8 °C | 109.73 mm |
| September | 11.3 °C | 23.4 °C | 107.95 mm |
| October | 5.1 °C | 16.8 °C | 87.63 mm |
| November | -0.2 °C | 10.1 °C | 93.47 mm |
| December | -4.2 °C | 4.1 °C | 89.15 mm |
| Annual | 4.3 °C | 15.4 °C | 1211.84 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| 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 |