Alvarado, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29.5 °F (low) to 49.9 °F (high). Annual precipitation averages 22.8 Inches. 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 | -3.4 °F | 14.4 °F | 0.61 in. |
| February | 0.0 °F | 19.3 °F | 0.58 in. |
| March | 14.4 °F | 32.6 °F | 0.85 in. |
| April | 30.0 °F | 51.1 °F | 1.15 in. |
| May | 42.7 °F | 66.1 °F | 3.13 in. |
| June | 54.2 °F | 75.5 °F | 4.0 in. |
| July | 57.8 °F | 80.0 °F | 3.35 in. |
| August | 54.8 °F | 79.5 °F | 2.93 in. |
| September | 46.0 °F | 70.1 °F | 2.58 in. |
| October | 33.6 °F | 53.8 °F | 1.95 in. |
| November | 18.7 °F | 35.5 °F | 0.88 in. |
| December | 5.0 °F | 20.7 °F | 0.8 in. |
| Annual | 29.5 °F | 49.9 °F | 22.81 in. |
| 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 : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |