Towner, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2.5 °C (low) to 10.5 °C (high). Annual precipitation averages 482.4 Millimeters. Towner 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 | -19.7 °C | -8.4 °C | 11.94 mm |
| February | -17.7 °C | -5.7 °C | 12.45 mm |
| March | -10.2 °C | 1.3 °C | 17.78 mm |
| April | -2.4 °C | 11.2 °C | 25.91 mm |
| May | 4.7 °C | 18.8 °C | 66.55 mm |
| June | 10.9 °C | 23.9 °C | 97.54 mm |
| July | 13.2 °C | 27.3 °C | 81.03 mm |
| August | 11.6 °C | 27.2 °C | 56.9 mm |
| September | 6.3 °C | 21.6 °C | 42.42 mm |
| October | -1.1 °C | 12.3 °C | 32.77 mm |
| November | -8.9 °C | 2.2 °C | 20.07 mm |
| December | -16.1 °C | -5.6 °C | 17.02 mm |
| Annual | -2.5 °C | 10.5 °C | 482.38 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |