Revillo, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.5 °F (low) to 54.5 °F (high). Annual precipitation averages 25.7 Inches. Revillo is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.7 °F | 22.7 °F | 0.7 in. |
| February | 7.2 °F | 26.9 °F | 0.72 in. |
| March | 19.7 °F | 39.0 °F | 1.28 in. |
| April | 32.5 °F | 54.7 °F | 2.52 in. |
| May | 45.8 °F | 68.0 °F | 3.05 in. |
| June | 56.9 °F | 78.1 °F | 3.97 in. |
| July | 60.7 °F | 82.4 °F | 3.66 in. |
| August | 57.8 °F | 80.4 °F | 3.07 in. |
| September | 48.8 °F | 73.0 °F | 2.56 in. |
| October | 35.6 °F | 58.3 °F | 2.25 in. |
| November | 22.8 °F | 42.2 °F | 1.07 in. |
| December | 10.6 °F | 28.0 °F | 0.82 in. |
| Annual | 33.5 °F | 54.5 °F | 25.67 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |