Moosup, Connecticut has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.6 °F (low) to 60.7 °F (high). Annual precipitation averages 49.5 Inches. Moosup 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 | 18.9 °F | 37.1 °F | 3.81 in. |
| February | 20.4 °F | 39.6 °F | 3.37 in. |
| March | 27.6 °F | 47.2 °F | 4.63 in. |
| April | 37.4 °F | 59.5 °F | 4.48 in. |
| May | 47.4 °F | 70.0 °F | 3.45 in. |
| June | 56.6 °F | 77.9 °F | 4.04 in. |
| July | 63.0 °F | 83.2 °F | 3.62 in. |
| August | 61.1 °F | 81.4 °F | 4.29 in. |
| September | 53.8 °F | 74.6 °F | 4.26 in. |
| October | 42.9 °F | 63.2 °F | 4.85 in. |
| November | 33.0 °F | 52.4 °F | 3.98 in. |
| December | 24.9 °F | 42.3 °F | 4.68 in. |
| Annual | 40.6 °F | 60.7 °F | 49.46 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |