Loudonville, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.5 °F (low) to 60.3 °F (high). Annual precipitation averages 41.8 Inches. Loudonville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.2 °F | 34.6 °F | 3.29 in. |
| February | 18.5 °F | 37.5 °F | 2.44 in. |
| March | 26.3 °F | 47.4 °F | 3.16 in. |
| April | 36.5 °F | 60.8 °F | 3.87 in. |
| May | 47.0 °F | 70.7 °F | 4.45 in. |
| June | 56.4 °F | 79.6 °F | 4.91 in. |
| July | 59.7 °F | 82.6 °F | 3.99 in. |
| August | 57.9 °F | 81.7 °F | 3.59 in. |
| September | 50.1 °F | 75.7 °F | 3.2 in. |
| October | 39.0 °F | 63.6 °F | 2.98 in. |
| November | 30.4 °F | 50.5 °F | 2.91 in. |
| December | 23.0 °F | 39.3 °F | 3.01 in. |
| Annual | 38.5 °F | 60.3 °F | 41.8 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |