Grovespring, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.3 °C (low) to 19.1 °C (high). Annual precipitation averages 1153.7 Millimeters. Grovespring 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 | -5.2 °C | 5.6 °C | 69.09 mm |
| February | -3.1 °C | 8.4 °C | 66.55 mm |
| March | 1.3 °C | 13.6 °C | 97.03 mm |
| April | 6.9 °C | 19.6 °C | 121.41 mm |
| May | 12.1 °C | 23.8 °C | 143 mm |
| June | 17.1 °C | 28.3 °C | 110.24 mm |
| July | 19.3 °C | 30.9 °C | 106.93 mm |
| August | 18.4 °C | 30.6 °C | 90.42 mm |
| September | 13.8 °C | 26.6 °C | 101.85 mm |
| October | 7.5 °C | 20.4 °C | 80.77 mm |
| November | 1.9 °C | 13.4 °C | 94.49 mm |
| December | -2.8 °C | 7.4 °C | 71.88 mm |
| Annual | 7.3 °C | 19.1 °C | 1153.66 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |