Moodus, Connecticut has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.9 °C (low) to 15.9 °C (high). Annual precipitation averages 1322.3 Millimeters. Moodus is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.1 °C | 2.7 °C | 101.85 mm |
| February | -6.2 °C | 4.2 °C | 87.12 mm |
| March | -2.1 °C | 8.4 °C | 119.89 mm |
| April | 3.3 °C | 15.2 °C | 116.33 mm |
| May | 8.8 °C | 20.8 °C | 95.5 mm |
| June | 14.1 °C | 25.6 °C | 119.13 mm |
| July | 17.2 °C | 28.4 °C | 97.79 mm |
| August | 16.4 °C | 27.8 °C | 112.01 mm |
| September | 12.1 °C | 23.7 °C | 113.79 mm |
| October | 5.8 °C | 17.2 °C | 131.06 mm |
| November | 0.5 °C | 11.3 °C | 107.19 mm |
| December | -3.8 °C | 5.8 °C | 120.65 mm |
| Annual | 4.9 °C | 15.9 °C | 1322.31 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |