Anna, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.1 °F (low) to 60.4 °F (high). Annual precipitation averages 41.7 Inches. Anna 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 | 18.3 °F | 33.6 °F | 2.94 in. |
| February | 20.3 °F | 37.2 °F | 2.42 in. |
| March | 28.7 °F | 47.6 °F | 3.27 in. |
| April | 39.1 °F | 60.8 °F | 4.14 in. |
| May | 50.6 °F | 71.3 °F | 4.29 in. |
| June | 60.0 °F | 80.0 °F | 4.58 in. |
| July | 62.8 °F | 83.2 °F | 4.58 in. |
| August | 61.0 °F | 82.0 °F | 3.26 in. |
| September | 53.6 °F | 76.6 °F | 3.15 in. |
| October | 42.4 °F | 64.1 °F | 2.84 in. |
| November | 32.3 °F | 50.0 °F | 3.17 in. |
| December | 24.1 °F | 38.5 °F | 3.1 in. |
| Annual | 41.1 °F | 60.4 °F | 41.74 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 |