Aldrich, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.8 °C (low) to 10.5 °C (high). Annual precipitation averages 692.2 Millimeters. 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 | -18.2 °C | -7.6 °C | 16.51 mm |
| February | -16.5 °C | -4.7 °C | 17.53 mm |
| March | -9 °C | 2.4 °C | 29.97 mm |
| April | -1.3 °C | 11.1 °C | 53.85 mm |
| May | 6.1 °C | 18.4 °C | 89.92 mm |
| June | 12.1 °C | 23.5 °C | 109.73 mm |
| July | 14.6 °C | 26.4 °C | 109.98 mm |
| August | 12.8 °C | 25.3 °C | 75.18 mm |
| September | 8.3 °C | 20.7 °C | 71.88 mm |
| October | 1.2 °C | 12.2 °C | 70.1 mm |
| November | -6.1 °C | 3.2 °C | 26.16 mm |
| December | -13.6 °C | -4.6 °C | 21.34 mm |
| Annual | -0.8 °C | 10.5 °C | 692.15 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 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |