Wooster, 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 59.7 °F (high). Annual precipitation averages 40.9 Inches. Wooster 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.0 °F | 33.9 °F | 2.71 in. |
| February | 20.2 °F | 36.9 °F | 2.12 in. |
| March | 28.2 °F | 46.5 °F | 3.02 in. |
| April | 38.9 °F | 60.0 °F | 3.92 in. |
| May | 49.4 °F | 70.4 °F | 4.25 in. |
| June | 58.4 °F | 79.0 °F | 4.55 in. |
| July | 62.0 °F | 82.1 °F | 4.12 in. |
| August | 60.2 °F | 80.8 °F | 3.74 in. |
| September | 53.0 °F | 74.9 °F | 3.45 in. |
| October | 42.1 °F | 62.6 °F | 3.35 in. |
| November | 32.7 °F | 50.1 °F | 2.92 in. |
| December | 24.9 °F | 38.7 °F | 2.76 in. |
| Annual | 40.8 °F | 59.7 °F | 40.91 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |