Kathryn, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.9 °F (low) to 52.2 °F (high). Annual precipitation averages 22.3 Inches. Kathryn 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 | -0.0 °F | 18.4 °F | 0.55 in. |
| February | 3.7 °F | 23.4 °F | 0.57 in. |
| March | 16.6 °F | 35.9 °F | 0.95 in. |
| April | 30.3 °F | 53.0 °F | 1.29 in. |
| May | 43.5 °F | 67.0 °F | 3.1 in. |
| June | 54.9 °F | 76.8 °F | 3.97 in. |
| July | 58.6 °F | 81.3 °F | 3.28 in. |
| August | 55.8 °F | 80.1 °F | 2.5 in. |
| September | 46.4 °F | 71.9 °F | 2.64 in. |
| October | 33.5 °F | 56.1 °F | 2.02 in. |
| November | 19.7 °F | 38.5 °F | 0.68 in. |
| December | 7.8 °F | 24.4 °F | 0.7 in. |
| Annual | 30.9 °F | 52.2 °F | 22.25 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 |