Dexter City, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.7 °F (low) to 63.7 °F (high). Annual precipitation averages 43.2 Inches. Dexter City 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.8 °F | 38.9 °F | 3.27 in. |
| February | 22.7 °F | 42.4 °F | 2.73 in. |
| March | 29.6 °F | 52.1 °F | 3.68 in. |
| April | 39.7 °F | 65.6 °F | 3.8 in. |
| May | 49.9 °F | 73.9 °F | 4.32 in. |
| June | 58.9 °F | 81.3 °F | 4.68 in. |
| July | 63.1 °F | 84.5 °F | 4.45 in. |
| August | 61.2 °F | 83.7 °F | 3.63 in. |
| September | 53.7 °F | 78.0 °F | 3.5 in. |
| October | 41.9 °F | 66.4 °F | 2.93 in. |
| November | 32.1 °F | 54.0 °F | 3.01 in. |
| December | 26.2 °F | 43.2 °F | 3.21 in. |
| Annual | 41.7 °F | 63.7 °F | 43.21 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |