Warsaw, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5 °C (low) to 16.6 °C (high). Annual precipitation averages 1090.4 Millimeters. Warsaw 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 | -6.7 °C | 2.4 °C | 83.31 mm |
| February | -5.9 °C | 4.2 °C | 62.74 mm |
| March | -1.7 °C | 9.7 °C | 89.41 mm |
| April | 3.9 °C | 17.2 °C | 101.35 mm |
| May | 9.7 °C | 22.4 °C | 106.68 mm |
| June | 14.7 °C | 26.9 °C | 123.44 mm |
| July | 16.8 °C | 28.8 °C | 106.43 mm |
| August | 15.8 °C | 28.2 °C | 100.58 mm |
| September | 11.6 °C | 24.8 °C | 83.31 mm |
| October | 5.2 °C | 18.2 °C | 76.71 mm |
| November | 0 °C | 11.1 °C | 76.45 mm |
| December | -3.9 °C | 4.9 °C | 80.01 mm |
| Annual | 5 °C | 16.6 °C | 1090.42 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |