Johnson, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.4 °F (low) to 54.4 °F (high). Annual precipitation averages 43.1 Inches. Johnson is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.2 °F | 26.5 °F | 2.8 in. |
| February | 7.4 °F | 29.5 °F | 2.29 in. |
| March | 18.0 °F | 38.7 °F | 2.89 in. |
| April | 31.7 °F | 53.1 °F | 3.52 in. |
| May | 43.5 °F | 66.5 °F | 3.92 in. |
| June | 52.3 °F | 74.9 °F | 4.39 in. |
| July | 57.1 °F | 79.5 °F | 4.62 in. |
| August | 55.4 °F | 78.2 °F | 4.16 in. |
| September | 48.4 °F | 71.1 °F | 3.56 in. |
| October | 37.5 °F | 57.2 °F | 4.28 in. |
| November | 27.2 °F | 44.4 °F | 3.19 in. |
| December | 15.5 °F | 32.7 °F | 3.45 in. |
| Annual | 33.4 °F | 54.4 °F | 43.07 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |