Grenora, North Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -2 °C (low) to 11.2 °C (high). Annual precipitation averages 375.7 Millimeters. Grenora 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.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17.8 °C | -6.8 °C | 10.92 mm |
| February | -15.3 °C | -4 °C | 9.14 mm |
| March | -8.9 °C | 2.8 °C | 13.72 mm |
| April | -2.2 °C | 12.3 °C | 27.43 mm |
| May | 4.3 °C | 19.2 °C | 51.05 mm |
| June | 10.1 °C | 23.4 °C | 80.77 mm |
| July | 12.7 °C | 27.7 °C | 62.99 mm |
| August | 11.5 °C | 27.7 °C | 37.59 mm |
| September | 5.8 °C | 21.5 °C | 31.24 mm |
| October | -1.2 °C | 12.4 °C | 23.62 mm |
| November | -8.5 °C | 2.4 °C | 14.73 mm |
| December | -14.7 °C | -4.2 °C | 12.45 mm |
| Annual | -2 °C | 11.2 °C | 375.65 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |