Delano, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.6 °F (low) to 54.3 °F (high). Annual precipitation averages 31.3 Inches. Delano is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.4 °F | 22.6 °F | 0.77 in. |
| February | 8.8 °F | 27.3 °F | 0.85 in. |
| March | 21.4 °F | 39.9 °F | 1.43 in. |
| April | 34.6 °F | 54.9 °F | 2.84 in. |
| May | 47.5 °F | 68.0 °F | 4.22 in. |
| June | 58.1 °F | 77.5 °F | 4.75 in. |
| July | 62.6 °F | 82.2 °F | 3.91 in. |
| August | 60.1 °F | 79.8 °F | 4.16 in. |
| September | 51.7 °F | 72.4 °F | 3.31 in. |
| October | 38.5 °F | 57.8 °F | 2.45 in. |
| November | 25.6 °F | 41.6 °F | 1.44 in. |
| December | 12.6 °F | 27.6 °F | 1.13 in. |
| Annual | 35.6 °F | 54.3 °F | 31.26 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |