Osnabrock, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 26.8 °F (low) to 47.3 °F (high). Annual precipitation averages 21.5 Inches. Osnabrock is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.0 °F | 12.7 °F | 0.54 in. |
| February | -2.3 °F | 17.4 °F | 0.51 in. |
| March | 11.4 °F | 29.7 °F | 0.74 in. |
| April | 27.4 °F | 47.9 °F | 0.91 in. |
| May | 40.0 °F | 63.0 °F | 3.28 in. |
| June | 51.3 °F | 72.2 °F | 4.06 in. |
| July | 55.0 °F | 76.8 °F | 3.42 in. |
| August | 52.6 °F | 77.0 °F | 2.59 in. |
| September | 43.3 °F | 67.8 °F | 2.25 in. |
| October | 30.4 °F | 51.4 °F | 1.57 in. |
| November | 15.7 °F | 32.8 °F | 0.86 in. |
| December | 2.2 °F | 18.3 °F | 0.73 in. |
| Annual | 26.8 °F | 47.3 °F | 21.46 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 3b : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |