Fort Ransom, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.2 °F (low) to 52.7 °F (high). Annual precipitation averages 22.1 Inches. Fort Ransom 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 | 0.5 °F | 18.8 °F | 0.56 in. |
| February | 4.0 °F | 23.9 °F | 0.58 in. |
| March | 16.9 °F | 36.6 °F | 0.97 in. |
| April | 30.4 °F | 53.5 °F | 1.34 in. |
| May | 43.8 °F | 67.4 °F | 3.09 in. |
| June | 55.2 °F | 77.3 °F | 3.96 in. |
| July | 58.8 °F | 81.8 °F | 3.26 in. |
| August | 56.1 °F | 80.5 °F | 2.34 in. |
| September | 46.6 °F | 72.2 °F | 2.57 in. |
| October | 33.7 °F | 56.5 °F | 2.09 in. |
| November | 19.8 °F | 38.8 °F | 0.68 in. |
| December | 8.0 °F | 25.1 °F | 0.69 in. |
| Annual | 31.2 °F | 52.7 °F | 22.13 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 |