Tower City, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.6 °F (low) to 51.7 °F (high). Annual precipitation averages 22.6 Inches. Tower City 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 | -0.8 °F | 17.2 °F | 0.55 in. |
| February | 3.1 °F | 22.3 °F | 0.55 in. |
| March | 16.1 °F | 34.7 °F | 0.91 in. |
| April | 30.2 °F | 52.6 °F | 1.15 in. |
| May | 43.2 °F | 67.1 °F | 3.16 in. |
| June | 54.8 °F | 76.5 °F | 4.19 in. |
| July | 58.3 °F | 81.1 °F | 3.45 in. |
| August | 55.5 °F | 80.0 °F | 2.62 in. |
| September | 46.4 °F | 71.5 °F | 2.56 in. |
| October | 33.8 °F | 55.7 °F | 2.01 in. |
| November | 19.6 °F | 37.9 °F | 0.72 in. |
| December | 7.2 °F | 23.4 °F | 0.71 in. |
| Annual | 30.6 °F | 51.7 °F | 22.58 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 |