Glenfield, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29.9 °F (low) to 50.7 °F (high). Annual precipitation averages 20.9 Inches. Glenfield 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 | -0.9 °F | 16.8 °F | 0.5 in. |
| February | 2.9 °F | 21.6 °F | 0.46 in. |
| March | 15.4 °F | 34.1 °F | 0.78 in. |
| April | 29.2 °F | 51.5 °F | 1.06 in. |
| May | 42.4 °F | 65.9 °F | 2.7 in. |
| June | 53.7 °F | 75.1 °F | 3.88 in. |
| July | 57.8 °F | 80.0 °F | 3.7 in. |
| August | 55.0 °F | 79.4 °F | 2.61 in. |
| September | 45.8 °F | 70.7 °F | 2.1 in. |
| October | 32.8 °F | 54.5 °F | 1.66 in. |
| November | 18.7 °F | 36.4 °F | 0.75 in. |
| December | 6.3 °F | 22.2 °F | 0.7 in. |
| Annual | 29.9 °F | 50.7 °F | 20.9 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 |