Aldrich, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.5 °F (low) to 50.9 °F (high). Annual precipitation averages 27.3 Inches. Aldrich 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.8 °F | 18.3 °F | 0.65 in. |
| February | 2.3 °F | 23.5 °F | 0.69 in. |
| March | 15.8 °F | 36.3 °F | 1.18 in. |
| April | 29.7 °F | 51.9 °F | 2.12 in. |
| May | 42.9 °F | 65.1 °F | 3.54 in. |
| June | 53.7 °F | 74.3 °F | 4.32 in. |
| July | 58.2 °F | 79.5 °F | 4.33 in. |
| August | 55.1 °F | 77.5 °F | 2.96 in. |
| September | 46.9 °F | 69.2 °F | 2.83 in. |
| October | 34.1 °F | 54.0 °F | 2.76 in. |
| November | 21.1 °F | 37.8 °F | 1.03 in. |
| December | 7.5 °F | 23.8 °F | 0.84 in. |
| Annual | 30.5 °F | 50.9 °F | 27.25 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 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |