Alvarado, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.4 °C (low) to 9.9 °C (high). Annual precipitation averages 579.4 Millimeters. Alvarado is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -19.7 °C | -9.8 °C | 15.49 mm |
| February | -17.8 °C | -7.1 °C | 14.73 mm |
| March | -9.8 °C | 0.3 °C | 21.59 mm |
| April | -1.1 °C | 10.6 °C | 29.21 mm |
| May | 5.9 °C | 18.9 °C | 79.5 mm |
| June | 12.3 °C | 24.2 °C | 101.6 mm |
| July | 14.3 °C | 26.7 °C | 85.09 mm |
| August | 12.7 °C | 26.4 °C | 74.42 mm |
| September | 7.8 °C | 21.2 °C | 65.53 mm |
| October | 0.9 °C | 12.1 °C | 49.53 mm |
| November | -7.4 °C | 1.9 °C | 22.35 mm |
| December | -15 °C | -6.3 °C | 20.32 mm |
| Annual | -1.4 °C | 9.9 °C | 579.36 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |