Backus, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.5 °F (low) to 50.4 °F (high). Annual precipitation averages 27 Inches. Backus is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.0 °F | 18.0 °F | 0.61 in. |
| February | 1.8 °F | 23.8 °F | 0.7 in. |
| March | 15.4 °F | 36.7 °F | 1.28 in. |
| April | 29.7 °F | 51.4 °F | 2.19 in. |
| May | 42.8 °F | 64.7 °F | 3.34 in. |
| June | 53.3 °F | 73.8 °F | 4.07 in. |
| July | 58.0 °F | 78.5 °F | 3.99 in. |
| August | 55.4 °F | 76.6 °F | 3.12 in. |
| September | 46.9 °F | 68.1 °F | 2.99 in. |
| October | 34.5 °F | 53.1 °F | 2.69 in. |
| November | 21.5 °F | 37.0 °F | 1.07 in. |
| December | 7.7 °F | 23.4 °F | 0.91 in. |
| Annual | 30.5 °F | 50.4 °F | 26.96 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |