Dunnell, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.7 °F (low) to 55.5 °F (high). Annual precipitation averages 31.6 Inches. Dunnell is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.8 °F | 23.6 °F | 0.78 in. |
| February | 10.5 °F | 27.9 °F | 0.86 in. |
| March | 22.7 °F | 40.5 °F | 1.73 in. |
| April | 34.8 °F | 56.6 °F | 3.39 in. |
| May | 47.6 °F | 69.0 °F | 4.66 in. |
| June | 58.5 °F | 79.0 °F | 4.8 in. |
| July | 62.1 °F | 82.6 °F | 3.84 in. |
| August | 59.1 °F | 79.8 °F | 3.63 in. |
| September | 50.6 °F | 74.4 °F | 3.13 in. |
| October | 37.7 °F | 60.0 °F | 2.4 in. |
| November | 24.6 °F | 43.1 °F | 1.39 in. |
| December | 12.9 °F | 28.9 °F | 0.98 in. |
| Annual | 35.7 °F | 55.5 °F | 31.59 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |