Oliver, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.3 °F (low) to 62.8 °F (high). Annual precipitation averages 43.9 Inches. Oliver 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 | 21.1 °F | 38.6 °F | 3.28 in. |
| February | 22.3 °F | 41.5 °F | 2.76 in. |
| March | 29.0 °F | 50.7 °F | 3.7 in. |
| April | 38.6 °F | 63.8 °F | 3.67 in. |
| May | 49.1 °F | 73.1 °F | 4.31 in. |
| June | 57.9 °F | 80.6 °F | 4.76 in. |
| July | 62.1 °F | 84.1 °F | 4.64 in. |
| August | 60.8 °F | 83.3 °F | 3.67 in. |
| September | 53.5 °F | 77.1 °F | 3.47 in. |
| October | 42.2 °F | 65.2 °F | 3.1 in. |
| November | 32.4 °F | 52.8 °F | 3.2 in. |
| December | 26.1 °F | 42.7 °F | 3.33 in. |
| Annual | 41.3 °F | 62.8 °F | 43.89 in. |
| 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 : -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 |