Dundee, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.1 °C (low) to 15.9 °C (high). Annual precipitation averages 1053.6 Millimeters. Dundee is located in USDA Plant Hardiness Zone 6b. 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 | -6.9 °C | 1.6 °C | 75.69 mm |
| February | -6.3 °C | 3.3 °C | 58.67 mm |
| March | -1.8 °C | 8.7 °C | 81.79 mm |
| April | 4 °C | 16.2 °C | 93.98 mm |
| May | 9.8 °C | 21.8 °C | 102.36 mm |
| June | 14.9 °C | 26.4 °C | 122.43 mm |
| July | 16.9 °C | 28.3 °C | 105.92 mm |
| August | 15.9 °C | 27.7 °C | 98.55 mm |
| September | 11.9 °C | 24.3 °C | 82.55 mm |
| October | 5.8 °C | 17.5 °C | 80.52 mm |
| November | 0.5 °C | 10.4 °C | 75.44 mm |
| December | -3.7 °C | 4.2 °C | 75.69 mm |
| Annual | 5.1 °C | 15.9 °C | 1053.59 mm |
| 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 6b : -20.6°C to -17.8°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 |