Chester, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.1 °F (low) to 56.3 °F (high). Annual precipitation averages 44 Inches. Chester is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.8 °F | 29.6 °F | 3.02 in. |
| February | 10.8 °F | 32.9 °F | 2.52 in. |
| March | 19.7 °F | 41.1 °F | 3.19 in. |
| April | 31.6 °F | 54.9 °F | 3.66 in. |
| May | 42.9 °F | 67.5 °F | 3.73 in. |
| June | 52.4 °F | 76.0 °F | 4.11 in. |
| July | 57.4 °F | 81.2 °F | 4.03 in. |
| August | 55.4 °F | 79.6 °F | 3.84 in. |
| September | 47.7 °F | 72.5 °F | 3.66 in. |
| October | 36.4 °F | 58.7 °F | 4.83 in. |
| November | 27.3 °F | 46.3 °F | 3.45 in. |
| December | 17.9 °F | 35.0 °F | 3.93 in. |
| Annual | 34.1 °F | 56.3 °F | 43.97 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| 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 |