Lake Wynonah, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.8 °F (low) to 61.3 °F (high). Annual precipitation averages 51 Inches. Lake Wynonah is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.6 °F | 36.6 °F | 3.73 in. |
| February | 19.9 °F | 39.6 °F | 2.81 in. |
| March | 27.6 °F | 48.2 °F | 3.93 in. |
| April | 37.8 °F | 60.8 °F | 4.11 in. |
| May | 47.6 °F | 71.0 °F | 4.08 in. |
| June | 56.8 °F | 79.3 °F | 5.2 in. |
| July | 60.9 °F | 84.2 °F | 5.03 in. |
| August | 59.2 °F | 82.5 °F | 4.55 in. |
| September | 52.1 °F | 75.7 °F | 5.23 in. |
| October | 40.8 °F | 63.9 °F | 4.63 in. |
| November | 31.7 °F | 52.0 °F | 3.59 in. |
| December | 24.5 °F | 41.3 °F | 4.11 in. |
| Annual | 39.8 °F | 61.3 °F | 51 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |