Beltrami, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.9 °C (low) to 10.1 °C (high). Annual precipitation averages 651 Millimeters. 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 | -19.1 °C | -9.3 °C | 23.62 mm |
| February | -17.1 °C | -6.7 °C | 18.8 mm |
| March | -9.2 °C | 0.7 °C | 26.92 mm |
| April | -0.7 °C | 10.7 °C | 37.08 mm |
| May | 6.3 °C | 18.8 °C | 78.74 mm |
| June | 12.8 °C | 24.1 °C | 109.22 mm |
| July | 14.7 °C | 26.6 °C | 85.85 mm |
| August | 12.9 °C | 26.2 °C | 77.72 mm |
| September | 8.1 °C | 21.1 °C | 80.26 mm |
| October | 1.3 °C | 12.3 °C | 61.72 mm |
| November | -6.8 °C | 2.6 °C | 25.15 mm |
| December | -14.4 °C | -5.9 °C | 25.91 mm |
| Annual | -0.9 °C | 10.1 °C | 650.99 mm |
| 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 : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |