Tappen, 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 51.6 °F (high). Annual precipitation averages 20.3 Inches. Tappen 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 | 18.8 °F | 0.45 in. |
| February | 4.9 °F | 23.4 °F | 0.45 in. |
| March | 16.6 °F | 36.0 °F | 0.7 in. |
| April | 29.6 °F | 52.4 °F | 1.3 in. |
| May | 42.5 °F | 65.3 °F | 2.95 in. |
| June | 53.5 °F | 74.6 °F | 3.63 in. |
| July | 58.2 °F | 80.9 °F | 3.45 in. |
| August | 55.5 °F | 79.9 °F | 2.36 in. |
| September | 46.1 °F | 70.8 °F | 2.12 in. |
| October | 33.2 °F | 55.1 °F | 1.65 in. |
| November | 19.0 °F | 37.9 °F | 0.62 in. |
| December | 7.4 °F | 24.1 °F | 0.62 in. |
| Annual | 30.6 °F | 51.6 °F | 20.3 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | Over 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 |