Jacksonville, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.9 °C (low) to 15.7 °C (high). Annual precipitation averages 1086.6 Millimeters. Jacksonville 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 | -6.7 °C | 2.5 °C | 88.65 mm |
| February | -6.1 °C | 4.2 °C | 69.09 mm |
| March | -2.2 °C | 9.2 °C | 89.66 mm |
| April | 3.4 °C | 16.7 °C | 98.55 mm |
| May | 9.3 °C | 22.2 °C | 104.39 mm |
| June | 14.1 °C | 26.3 °C | 116.08 mm |
| July | 16.4 °C | 28.3 °C | 118.36 mm |
| August | 15.6 °C | 27.7 °C | 107.44 mm |
| September | 11.8 °C | 24.1 °C | 103.38 mm |
| October | 5.5 °C | 17.6 °C | 84.07 mm |
| November | 0.2 °C | 10.8 °C | 88.9 mm |
| December | -3.6 °C | 4.8 °C | 86.36 mm |
| Annual | 4.8 °C | 16.2 °C | 1154.93 mm |
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.7 °C | 1.5 °C | 73.66 mm |
| February | -7.1 °C | 3.3 °C | 59.69 mm |
| March | -3.2 °C | 8.3 °C | 86.11 mm |
| April | 2.6 °C | 15.9 °C | 89.15 mm |
| May | 8.4 °C | 21.9 °C | 108.2 mm |
| June | 13.5 °C | 26.2 °C | 98.81 mm |
| July | 15.8 °C | 28.7 °C | 104.9 mm |
| August | 14.8 °C | 27.6 °C | 106.43 mm |
| September | 10.8 °C | 23.6 °C | 105.41 mm |
| October | 4.6 °C | 16.9 °C | 96.52 mm |
| November | -0.6 °C | 10.1 °C | 76.96 mm |
| December | -4.6 °C | 3.9 °C | 80.77 mm |
| Annual | 3.9 °C | 15.7 °C | 1086.61 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |