New Brighton, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.5 °F (low) to 55 °F (high). Annual precipitation averages 33.8 Inches. New Brighton is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.2 °F | 23.3 °F | 0.96 in. |
| February | 10.4 °F | 28.2 °F | 0.89 in. |
| March | 22.3 °F | 41.0 °F | 1.71 in. |
| April | 35.4 °F | 55.6 °F | 3.11 in. |
| May | 48.2 °F | 68.5 °F | 4.39 in. |
| June | 58.5 °F | 78.1 °F | 4.74 in. |
| July | 63.5 °F | 82.8 °F | 4.39 in. |
| August | 60.8 °F | 80.4 °F | 4.29 in. |
| September | 52.3 °F | 72.8 °F | 3.47 in. |
| October | 39.1 °F | 58.0 °F | 2.84 in. |
| November | 26.5 °F | 42.4 °F | 1.7 in. |
| December | 14.2 °F | 28.7 °F | 1.29 in. |
| Annual | 36.5 °F | 55 °F | 33.78 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |