Clarissa, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.5 °F (low) to 51.5 °F (high). Annual precipitation averages 28.1 Inches. Clarissa 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.2 °F | 19.0 °F | 0.7 in. |
| February | 3.8 °F | 24.2 °F | 0.69 in. |
| March | 16.8 °F | 36.8 °F | 1.24 in. |
| April | 30.6 °F | 52.4 °F | 2.2 in. |
| May | 43.7 °F | 65.8 °F | 3.47 in. |
| June | 54.4 °F | 75.2 °F | 4.57 in. |
| July | 59.1 °F | 79.9 °F | 4.2 in. |
| August | 56.3 °F | 78.1 °F | 3.5 in. |
| September | 47.9 °F | 69.8 °F | 2.9 in. |
| October | 34.9 °F | 54.7 °F | 2.75 in. |
| November | 21.7 °F | 38.0 °F | 1.03 in. |
| December | 8.4 °F | 24.5 °F | 0.89 in. |
| Annual | 31.5 °F | 51.5 °F | 28.14 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 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 |