Clinton, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.3 °F (low) to 53.3 °F (high). Annual precipitation averages 25.3 Inches. Clinton is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.1 °F | 20.8 °F | 0.63 in. |
| February | 6.5 °F | 25.1 °F | 0.62 in. |
| March | 19.3 °F | 37.6 °F | 1.14 in. |
| April | 32.2 °F | 53.8 °F | 2.46 in. |
| May | 45.6 °F | 67.5 °F | 2.88 in. |
| June | 56.8 °F | 77.2 °F | 3.94 in. |
| July | 60.8 °F | 81.4 °F | 4.13 in. |
| August | 58.0 °F | 79.6 °F | 2.85 in. |
| September | 48.9 °F | 72.2 °F | 2.63 in. |
| October | 35.9 °F | 57.1 °F | 2.36 in. |
| November | 22.6 °F | 40.6 °F | 1.0 in. |
| December | 10.1 °F | 26.5 °F | 0.68 in. |
| Annual | 33.3 °F | 53.3 °F | 25.32 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |