Hammond, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.4 °F (low) to 55 °F (high). Annual precipitation averages 35.1 Inches. Hammond 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 | 6.2 °F | 23.6 °F | 0.97 in. |
| February | 9.8 °F | 28.3 °F | 1.0 in. |
| March | 22.3 °F | 40.7 °F | 1.91 in. |
| April | 34.7 °F | 55.8 °F | 3.33 in. |
| May | 46.8 °F | 68.4 °F | 4.51 in. |
| June | 57.2 °F | 78.1 °F | 5.27 in. |
| July | 61.1 °F | 81.8 °F | 4.26 in. |
| August | 58.7 °F | 79.6 °F | 4.74 in. |
| September | 50.7 °F | 72.6 °F | 3.72 in. |
| October | 38.0 °F | 58.9 °F | 2.5 in. |
| November | 25.8 °F | 42.4 °F | 1.71 in. |
| December | 13.8 °F | 29.2 °F | 1.22 in. |
| Annual | 35.4 °F | 55 °F | 35.14 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |