Alexandria, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.4 °C (low) to 10.8 °C (high). Annual precipitation averages 672.3 Millimeters. Alexandria is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17 °C | -7.3 °C | 17.78 mm |
| February | -15.1 °C | -4.7 °C | 14.73 mm |
| March | -8.1 °C | 2.3 °C | 28.7 mm |
| April | -0.1 °C | 11.3 °C | 51.31 mm |
| May | 7.4 °C | 18.8 °C | 81.03 mm |
| June | 13.4 °C | 24.1 °C | 109.22 mm |
| July | 16 °C | 26.7 °C | 106.43 mm |
| August | 14.4 °C | 25.7 °C | 86.61 mm |
| September | 9.6 °C | 21.2 °C | 66.29 mm |
| October | 2.2 °C | 12.7 °C | 64.77 mm |
| November | -5.3 °C | 3.4 °C | 25.65 mm |
| December | -12.6 °C | -4.1 °C | 19.81 mm |
| Annual | 0.4 °C | 10.8 °C | 672.33 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |