Sun Valley, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.2 °C (low) to 14.7 °C (high). Annual precipitation averages 1434.1 Millimeters. Sun Valley 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.6 °C | 1 °C | 109.22 mm |
| February | -8.1 °C | 2.5 °C | 79.25 mm |
| March | -3.9 °C | 7.1 °C | 104.65 mm |
| April | 1.9 °C | 14.6 °C | 118.11 mm |
| May | 7.6 °C | 20.5 °C | 114.55 mm |
| June | 12.5 °C | 24.9 °C | 140.72 mm |
| July | 15.2 °C | 27.4 °C | 134.62 mm |
| August | 14.2 °C | 26.4 °C | 131.57 mm |
| September | 10.4 °C | 22.7 °C | 142.24 mm |
| October | 4.1 °C | 15.9 °C | 139.7 mm |
| November | -1.1 °C | 9.6 °C | 100.84 mm |
| December | -5.3 °C | 3.6 °C | 118.62 mm |
| Annual | 3.2 °C | 14.7 °C | 1434.09 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |