Carl Junction, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.3 °C (low) to 20.2 °C (high). Annual precipitation averages 1175.3 Millimeters. Carl Junction is located in USDA Plant Hardiness Zone 7a. 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 | -4.3 °C | 6.7 °C | 48.01 mm |
| February | -2.3 °C | 9.6 °C | 52.07 mm |
| March | 2.4 °C | 14.9 °C | 84.58 mm |
| April | 7.7 °C | 20.1 °C | 126.75 mm |
| May | 13.4 °C | 24.6 °C | 172.97 mm |
| June | 18.5 °C | 29.6 °C | 137.92 mm |
| July | 20.7 °C | 32.2 °C | 105.16 mm |
| August | 19.7 °C | 32.1 °C | 88.14 mm |
| September | 15.1 °C | 27.8 °C | 114.3 mm |
| October | 8.4 °C | 21.6 °C | 97.79 mm |
| November | 2.4 °C | 14.6 °C | 83.31 mm |
| December | -2.3 °C | 8.5 °C | 64.26 mm |
| Annual | 8.3 °C | 20.2 °C | 1175.26 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 7a : -17.8°C to -15°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 |