Marshfield, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.7 °C (low) to 19.1 °C (high). Annual precipitation averages 1177.6 Millimeters. Marshfield is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.9 °C | 5.7 °C | 66.55 mm |
| February | -2.9 °C | 8.4 °C | 61.98 mm |
| March | 1.7 °C | 13.6 °C | 97.03 mm |
| April | 7.2 °C | 19.5 °C | 116.84 mm |
| May | 12.5 °C | 23.9 °C | 142.24 mm |
| June | 17.4 °C | 28.4 °C | 116.59 mm |
| July | 19.8 °C | 31 °C | 116.84 mm |
| August | 18.9 °C | 30.7 °C | 90.68 mm |
| September | 14.6 °C | 26.6 °C | 109.47 mm |
| October | 8.1 °C | 20.4 °C | 92.2 mm |
| November | 2.2 °C | 13.4 °C | 96.52 mm |
| December | -2.6 °C | 7.4 °C | 70.61 mm |
| Annual | 7.7 °C | 19.1 °C | 1177.55 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |