Beaulieu, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30 °F (low) to 50 °F (high). Annual precipitation averages 25.7 Inches. Beaulieu 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 | -1.9 °F | 16.3 °F | 0.89 in. |
| February | 0.9 °F | 21.2 °F | 0.77 in. |
| March | 15.5 °F | 34.5 °F | 1.0 in. |
| April | 29.8 °F | 51.1 °F | 1.43 in. |
| May | 42.5 °F | 65.3 °F | 3.12 in. |
| June | 53.7 °F | 74.4 °F | 4.33 in. |
| July | 57.6 °F | 78.8 °F | 3.66 in. |
| August | 55.2 °F | 77.8 °F | 2.98 in. |
| September | 46.5 °F | 69.2 °F | 2.88 in. |
| October | 34.3 °F | 53.4 °F | 2.46 in. |
| November | 19.8 °F | 36.0 °F | 1.16 in. |
| December | 6.0 °F | 22.5 °F | 0.99 in. |
| Annual | 30 °F | 50 °F | 25.67 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |