Jeannette, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.8 °F (low) to 61.7 °F (high). Annual precipitation averages 43.8 Inches. Jeannette 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 | 20.6 °F | 37.4 °F | 3.26 in. |
| February | 21.3 °F | 40.1 °F | 2.71 in. |
| March | 28.4 °F | 49.2 °F | 3.38 in. |
| April | 38.3 °F | 62.3 °F | 3.64 in. |
| May | 48.7 °F | 72.0 °F | 4.17 in. |
| June | 57.5 °F | 79.8 °F | 4.53 in. |
| July | 61.7 °F | 83.6 °F | 4.59 in. |
| August | 60.2 °F | 82.6 °F | 3.95 in. |
| September | 53.1 °F | 76.2 °F | 3.8 in. |
| October | 41.7 °F | 64.1 °F | 3.25 in. |
| November | 32.2 °F | 51.8 °F | 3.23 in. |
| December | 25.7 °F | 41.6 °F | 3.25 in. |
| Annual | 40.8 °F | 61.7 °F | 43.76 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 |