Bagley, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 28.7 °F (low) to 49.8 °F (high). Annual precipitation averages 25.5 Inches. Bagley is located in USDA Plant Hardiness Zone 3b. 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 | -3.7 °F | 17.2 °F | 0.75 in. |
| February | -0.9 °F | 22.7 °F | 0.65 in. |
| March | 13.4 °F | 35.9 °F | 1.04 in. |
| April | 27.9 °F | 50.6 °F | 1.52 in. |
| May | 41.1 °F | 64.4 °F | 3.08 in. |
| June | 52.1 °F | 73.6 °F | 4.39 in. |
| July | 56.6 °F | 78.6 °F | 3.71 in. |
| August | 53.9 °F | 76.8 °F | 2.98 in. |
| September | 45.5 °F | 67.9 °F | 2.9 in. |
| October | 33.6 °F | 52.3 °F | 2.44 in. |
| November | 19.5 °F | 35.3 °F | 1.13 in. |
| December | 5.5 °F | 22.5 °F | 0.86 in. |
| Annual | 28.7 °F | 49.8 °F | 25.45 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |