Hamler, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.8 °F (low) to 60.3 °F (high). Annual precipitation averages 36.8 Inches. Hamler is located in USDA Plant Hardiness Zone 6a. 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 | 18.1 °F | 32.8 °F | 2.44 in. |
| February | 19.8 °F | 36.0 °F | 2.1 in. |
| March | 27.9 °F | 46.5 °F | 2.5 in. |
| April | 38.2 °F | 60.2 °F | 3.51 in. |
| May | 49.9 °F | 71.6 °F | 4.15 in. |
| June | 59.8 °F | 81.0 °F | 3.84 in. |
| July | 62.9 °F | 84.5 °F | 3.78 in. |
| August | 60.8 °F | 82.5 °F | 3.58 in. |
| September | 53.4 °F | 76.8 °F | 2.96 in. |
| October | 42.4 °F | 63.9 °F | 2.74 in. |
| November | 32.4 °F | 49.5 °F | 2.78 in. |
| December | 23.8 °F | 37.7 °F | 2.44 in. |
| Annual | 40.8 °F | 60.3 °F | 36.82 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 6a : -10°F to -5°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 |