Sidney, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.3 °F (low) to 60.9 °F (high). Annual precipitation averages 42.5 Inches. Sidney 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 | 18.6 °F | 34.1 °F | 2.92 in. |
| February | 20.7 °F | 37.7 °F | 2.42 in. |
| March | 29.0 °F | 48.1 °F | 3.3 in. |
| April | 39.4 °F | 61.4 °F | 4.3 in. |
| May | 50.8 °F | 71.9 °F | 4.32 in. |
| June | 60.0 °F | 80.5 °F | 4.66 in. |
| July | 62.9 °F | 83.7 °F | 4.75 in. |
| August | 60.9 °F | 82.4 °F | 3.45 in. |
| September | 53.6 °F | 77.1 °F | 3.11 in. |
| October | 42.4 °F | 64.5 °F | 2.85 in. |
| November | 32.4 °F | 50.4 °F | 3.18 in. |
| December | 24.4 °F | 39.0 °F | 3.2 in. |
| Annual | 41.3 °F | 60.9 °F | 42.46 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 |