Dover, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.6 °C (low) to 18 °C (high). Annual precipitation averages 1052.6 Millimeters. Dover is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.2 °C | 3.1 °C | 36.32 mm |
| February | -4.9 °C | 6.1 °C | 46.74 mm |
| March | 0.3 °C | 12.3 °C | 70.36 mm |
| April | 6.1 °C | 18.3 °C | 106.68 mm |
| May | 12.2 °C | 23.7 °C | 135.64 mm |
| June | 17.6 °C | 28.6 °C | 130.81 mm |
| July | 19.7 °C | 30.8 °C | 121.67 mm |
| August | 18.4 °C | 30.2 °C | 107.7 mm |
| September | 13.5 °C | 26.2 °C | 106.43 mm |
| October | 7.1 °C | 19.7 °C | 83.31 mm |
| November | 0.8 °C | 11.9 °C | 61.21 mm |
| December | -4.4 °C | 5.4 °C | 45.72 mm |
| Annual | 6.6 °C | 18 °C | 1052.59 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |