Georgetown, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.4 °F (low) to 60.7 °F (high). Annual precipitation averages 51.3 Inches. Georgetown 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 | 19.6 °F | 36.7 °F | 3.98 in. |
| February | 21.2 °F | 39.4 °F | 3.08 in. |
| March | 28.4 °F | 46.9 °F | 4.25 in. |
| April | 38.7 °F | 59.8 °F | 4.09 in. |
| May | 48.5 °F | 70.3 °F | 3.9 in. |
| June | 58.0 °F | 78.5 °F | 4.66 in. |
| July | 63.5 °F | 83.6 °F | 4.15 in. |
| August | 62.0 °F | 81.7 °F | 4.82 in. |
| September | 54.7 °F | 74.8 °F | 4.8 in. |
| October | 43.2 °F | 63.3 °F | 4.78 in. |
| November | 33.3 °F | 52.1 °F | 4.2 in. |
| December | 25.5 °F | 41.6 °F | 4.55 in. |
| Annual | 41.4 °F | 60.7 °F | 51.26 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |