Halliday, North Dakota has a Humid Continental Mild Summer With Dry Winters climate (Köppen classification: Dwb). Average annual temperatures range from 30 °F (low) to 53.7 °F (high). Annual precipitation averages 18 Inches. Halliday 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 | 2.8 °F | 22.5 °F | 0.44 in. |
| February | 6.7 °F | 27.3 °F | 0.45 in. |
| March | 17.3 °F | 39.1 °F | 0.77 in. |
| April | 28.6 °F | 53.9 °F | 1.21 in. |
| May | 40.7 °F | 66.0 °F | 2.91 in. |
| June | 50.9 °F | 74.9 °F | 3.28 in. |
| July | 55.9 °F | 82.5 °F | 2.5 in. |
| August | 54.0 °F | 82.7 °F | 1.81 in. |
| September | 44.1 °F | 72.6 °F | 1.85 in. |
| October | 31.8 °F | 56.1 °F | 1.46 in. |
| November | 18.8 °F | 39.4 °F | 0.73 in. |
| December | 8.2 °F | 26.8 °F | 0.57 in. |
| Annual | 30 °F | 53.7 °F | 17.98 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 | Abnormally Dry |
| Köppen Climate Classification | Dwb - Humid Continental Mild Summer With Dry Winters |