Jacksonville, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.5 °F (low) to 54.1 °F (high). Annual precipitation averages 57.3 Inches. Jacksonville is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.0 °F | 29.3 °F | 4.07 in. |
| February | 10.1 °F | 31.6 °F | 3.73 in. |
| March | 18.2 °F | 39.4 °F | 4.47 in. |
| April | 29.9 °F | 52.2 °F | 4.54 in. |
| May | 41.0 °F | 64.2 °F | 4.56 in. |
| June | 50.0 °F | 73.2 °F | 5.47 in. |
| July | 55.1 °F | 77.6 °F | 4.86 in. |
| August | 53.1 °F | 76.4 °F | 4.63 in. |
| September | 45.4 °F | 69.7 °F | 5.22 in. |
| October | 34.8 °F | 56.8 °F | 6.04 in. |
| November | 26.2 °F | 44.8 °F | 4.49 in. |
| December | 16.7 °F | 34.0 °F | 5.17 in. |
| Annual | 32.5 °F | 54.1 °F | 57.25 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |