Beltrami, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.3 °F (low) to 50.2 °F (high). Annual precipitation averages 25.6 Inches. Beltrami 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.3 °F | 15.2 °F | 0.93 in. |
| February | 1.3 °F | 20.0 °F | 0.74 in. |
| March | 15.5 °F | 33.3 °F | 1.06 in. |
| April | 30.7 °F | 51.3 °F | 1.46 in. |
| May | 43.3 °F | 65.8 °F | 3.1 in. |
| June | 55.0 °F | 75.4 °F | 4.3 in. |
| July | 58.5 °F | 79.8 °F | 3.38 in. |
| August | 55.3 °F | 79.1 °F | 3.06 in. |
| September | 46.5 °F | 69.9 °F | 3.16 in. |
| October | 34.3 °F | 54.1 °F | 2.43 in. |
| November | 19.8 °F | 36.6 °F | 0.99 in. |
| December | 6.1 °F | 21.3 °F | 1.02 in. |
| Annual | 30.3 °F | 50.2 °F | 25.63 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 |