Marvin, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.1 °C (low) to 11.8 °C (high). Annual precipitation averages 644.9 Millimeters. Marvin is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.3 °C | -6.3 °C | 17.27 mm |
| February | -14.3 °C | -3.7 °C | 17.53 mm |
| March | -7.6 °C | 3.3 °C | 29.46 mm |
| April | -0.6 °C | 12.1 °C | 60.2 mm |
| May | 6.6 °C | 19.5 °C | 76.96 mm |
| June | 12.6 °C | 24.8 °C | 99.31 mm |
| July | 15 °C | 27.6 °C | 101.6 mm |
| August | 13.8 °C | 26.7 °C | 72.14 mm |
| September | 9 °C | 22.4 °C | 66.55 mm |
| October | 1.7 °C | 14 °C | 61.98 mm |
| November | -5.8 °C | 4.6 °C | 23.37 mm |
| December | -12.6 °C | -3.2 °C | 18.54 mm |
| Annual | 0.1 °C | 11.8 °C | 644.91 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |