Clinton, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42 °F (low) to 61.3 °F (high). Annual precipitation averages 41.4 Inches. Clinton 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 | 20.8 °F | 36.5 °F | 3.37 in. |
| February | 22.2 °F | 39.5 °F | 2.62 in. |
| March | 29.3 °F | 48.9 °F | 3.26 in. |
| April | 39.9 °F | 62.0 °F | 3.64 in. |
| May | 50.3 °F | 71.7 °F | 3.93 in. |
| June | 59.1 °F | 79.4 °F | 4.37 in. |
| July | 63.0 °F | 83.1 °F | 4.16 in. |
| August | 61.5 °F | 82.1 °F | 3.41 in. |
| September | 54.6 °F | 75.7 °F | 3.53 in. |
| October | 43.3 °F | 63.5 °F | 3.02 in. |
| November | 33.8 °F | 51.6 °F | 2.94 in. |
| December | 26.3 °F | 41.2 °F | 3.13 in. |
| Annual | 42 °F | 61.3 °F | 41.38 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 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |