Emma, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.9 °C (low) to 18.3 °C (high). Annual precipitation averages 1090.7 Millimeters. Emma is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.8 °C | 3.6 °C | 40.13 mm |
| February | -4.5 °C | 6.6 °C | 50.04 mm |
| March | 0.8 °C | 12.7 °C | 73.15 mm |
| April | 6.3 °C | 18.6 °C | 113.03 mm |
| May | 12.5 °C | 23.8 °C | 139.95 mm |
| June | 17.8 °C | 28.7 °C | 127.76 mm |
| July | 19.9 °C | 31 °C | 125.98 mm |
| August | 18.7 °C | 30.4 °C | 106.17 mm |
| September | 13.6 °C | 26.3 °C | 107.44 mm |
| October | 7.2 °C | 20 °C | 87.88 mm |
| November | 1.1 °C | 12.3 °C | 66.8 mm |
| December | -4 °C | 5.8 °C | 52.32 mm |
| Annual | 6.9 °C | 18.3 °C | 1090.65 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |