Blanchard, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.5 °F (low) to 51.1 °F (high). Annual precipitation averages 23.2 Inches. Blanchard 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 | -1.7 °F | 16.0 °F | 0.61 in. |
| February | 2.2 °F | 21.3 °F | 0.58 in. |
| March | 15.7 °F | 33.9 °F | 0.93 in. |
| April | 30.6 °F | 52.2 °F | 1.21 in. |
| May | 43.5 °F | 66.7 °F | 2.92 in. |
| June | 55.1 °F | 76.3 °F | 4.09 in. |
| July | 58.5 °F | 80.7 °F | 3.76 in. |
| August | 55.4 °F | 79.6 °F | 2.72 in. |
| September | 46.6 °F | 71.2 °F | 2.74 in. |
| October | 34.3 °F | 55.3 °F | 2.02 in. |
| November | 19.8 °F | 37.4 °F | 0.81 in. |
| December | 6.5 °F | 22.3 °F | 0.77 in. |
| Annual | 30.5 °F | 51.1 °F | 23.16 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |