Hawley, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.5 °F (low) to 51.6 °F (high). Annual precipitation averages 25.1 Inches. Hawley 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.6 °F | 17.2 °F | 0.65 in. |
| February | 2.4 °F | 22.0 °F | 0.63 in. |
| March | 17.0 °F | 35.2 °F | 0.94 in. |
| April | 31.4 °F | 52.6 °F | 1.46 in. |
| May | 44.3 °F | 67.5 °F | 3.1 in. |
| June | 55.3 °F | 76.9 °F | 4.24 in. |
| July | 59.6 °F | 80.8 °F | 3.64 in. |
| August | 57.0 °F | 79.6 °F | 3.08 in. |
| September | 48.4 °F | 70.8 °F | 3.14 in. |
| October | 35.0 °F | 55.1 °F | 2.61 in. |
| November | 21.0 °F | 37.6 °F | 0.82 in. |
| December | 7.5 °F | 23.9 °F | 0.78 in. |
| Annual | 31.5 °F | 51.6 °F | 25.09 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |