Middletown Springs, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.4 °C (low) to 13.1 °C (high). Annual precipitation averages 1195.8 Millimeters. Middletown Springs is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.7 °C | -1.3 °C | 81.79 mm |
| February | -11.2 °C | 0.3 °C | 66.8 mm |
| March | -6.3 °C | 4.9 °C | 88.65 mm |
| April | 0.1 °C | 12.4 °C | 94.49 mm |
| May | 6.3 °C | 19.4 °C | 104.9 mm |
| June | 11.3 °C | 24 °C | 124.46 mm |
| July | 13.8 °C | 26.5 °C | 122.17 mm |
| August | 12.7 °C | 25.6 °C | 110.24 mm |
| September | 8.5 °C | 21.8 °C | 101.09 mm |
| October | 2.7 °C | 14.5 °C | 115.82 mm |
| November | -2.3 °C | 7.8 °C | 86.61 mm |
| December | -7.5 °C | 1.7 °C | 98.81 mm |
| Annual | 1.4 °C | 13.1 °C | 1195.83 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |