Dover, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.9 °C (low) to 12.3 °C (high). Annual precipitation averages 887.2 Millimeters. Dover is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.1 °C | -5 °C | 24.38 mm |
| February | -12.2 °C | -2.6 °C | 25.91 mm |
| March | -5.4 °C | 4.3 °C | 46.23 mm |
| April | 1.4 °C | 12.7 °C | 95.5 mm |
| May | 8.2 °C | 19.6 °C | 109.98 mm |
| June | 14.1 °C | 25.1 °C | 137.16 mm |
| July | 16 °C | 27 °C | 102.36 mm |
| August | 14.7 °C | 25.8 °C | 116.33 mm |
| September | 10.2 °C | 22.1 °C | 92.71 mm |
| October | 3.2 °C | 14.6 °C | 61.98 mm |
| November | -3.5 °C | 5.6 °C | 43.69 mm |
| December | -10.1 °C | -1.9 °C | 30.99 mm |
| Annual | 1.9 °C | 12.3 °C | 887.22 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |