Georgetown, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.2 °C (low) to 17.8 °C (high). Annual precipitation averages 1205.5 Millimeters. Georgetown is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.5 °C | 4.2 °C | 83.57 mm |
| February | -4.1 °C | 6.6 °C | 79.5 mm |
| March | 0 °C | 11.6 °C | 114.55 mm |
| April | 5.4 °C | 18.3 °C | 118.62 mm |
| May | 11.2 °C | 23.1 °C | 128.52 mm |
| June | 15.9 °C | 27.7 °C | 120.14 mm |
| July | 17.8 °C | 29.6 °C | 126.24 mm |
| August | 16.8 °C | 29 °C | 92.71 mm |
| September | 12.8 °C | 25.8 °C | 84.84 mm |
| October | 6.3 °C | 19.3 °C | 78.99 mm |
| November | 1 °C | 12 °C | 83.06 mm |
| December | -2.7 °C | 6.4 °C | 94.74 mm |
| Annual | 6.2 °C | 17.8 °C | 1205.48 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |