Oval, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.7 °F (low) to 60.8 °F (high). Annual precipitation averages 44.1 Inches. Oval 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.5 °F | 35.0 °F | 3.18 in. |
| February | 18.6 °F | 38.4 °F | 2.37 in. |
| March | 26.0 °F | 47.4 °F | 3.38 in. |
| April | 36.2 °F | 61.1 °F | 3.69 in. |
| May | 46.5 °F | 72.1 °F | 3.99 in. |
| June | 55.7 °F | 80.0 °F | 4.22 in. |
| July | 60.0 °F | 84.4 °F | 4.64 in. |
| August | 58.5 °F | 82.5 °F | 4.15 in. |
| September | 51.2 °F | 75.3 °F | 4.42 in. |
| October | 39.9 °F | 63.1 °F | 3.73 in. |
| November | 30.6 °F | 50.7 °F | 3.07 in. |
| December | 23.4 °F | 39.5 °F | 3.22 in. |
| Annual | 38.7 °F | 60.8 °F | 44.06 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |