Hannaford, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29.7 °F (low) to 50.4 °F (high). Annual precipitation averages 21.8 Inches. Hannaford 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.6 °F | 16.3 °F | 0.51 in. |
| February | 2.2 °F | 21.1 °F | 0.5 in. |
| March | 15.1 °F | 33.8 °F | 0.85 in. |
| April | 29.1 °F | 50.9 °F | 1.16 in. |
| May | 42.2 °F | 65.6 °F | 2.91 in. |
| June | 54.0 °F | 74.9 °F | 3.91 in. |
| July | 57.8 °F | 79.6 °F | 3.73 in. |
| August | 54.8 °F | 79.1 °F | 2.76 in. |
| September | 45.6 °F | 70.2 °F | 2.24 in. |
| October | 32.7 °F | 54.4 °F | 1.78 in. |
| November | 18.5 °F | 36.6 °F | 0.75 in. |
| December | 6.2 °F | 22.2 °F | 0.74 in. |
| Annual | 29.7 °F | 50.4 °F | 21.84 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 |