Fort Ripley, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.6 °F (low) to 52.3 °F (high). Annual precipitation averages 28.8 Inches. Fort Ripley 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 | 0.4 °F | 19.7 °F | 0.67 in. |
| February | 3.5 °F | 25.1 °F | 0.81 in. |
| March | 17.0 °F | 38.1 °F | 1.41 in. |
| April | 30.6 °F | 53.0 °F | 2.39 in. |
| May | 44.0 °F | 66.6 °F | 3.52 in. |
| June | 54.6 °F | 76.0 °F | 4.39 in. |
| July | 59.0 °F | 81.0 °F | 4.19 in. |
| August | 56.1 °F | 78.7 °F | 3.49 in. |
| September | 47.7 °F | 70.3 °F | 2.92 in. |
| October | 35.2 °F | 55.4 °F | 2.84 in. |
| November | 22.2 °F | 38.7 °F | 1.23 in. |
| December | 9.0 °F | 25.1 °F | 0.89 in. |
| Annual | 31.6 °F | 52.3 °F | 28.75 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |