Bemidji, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29.4 °F (low) to 49.6 °F (high). Annual precipitation averages 25.6 Inches. Bemidji 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 | -2.6 °F | 17.0 °F | 0.68 in. |
| February | 0.3 °F | 22.8 °F | 0.62 in. |
| March | 14.1 °F | 36.1 °F | 0.99 in. |
| April | 28.2 °F | 50.2 °F | 1.77 in. |
| May | 41.6 °F | 64.0 °F | 2.93 in. |
| June | 52.6 °F | 73.3 °F | 4.28 in. |
| July | 57.2 °F | 78.1 °F | 3.77 in. |
| August | 54.8 °F | 76.5 °F | 3.02 in. |
| September | 46.2 °F | 67.3 °F | 3.0 in. |
| October | 34.2 °F | 52.1 °F | 2.45 in. |
| November | 20.3 °F | 35.5 °F | 1.17 in. |
| December | 6.0 °F | 22.5 °F | 0.87 in. |
| Annual | 29.4 °F | 49.6 °F | 25.55 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 | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |