Theodosia, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.1 °C (low) to 21.1 °C (high). Annual precipitation averages 1164.8 Millimeters. Theodosia 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 | -3.4 °C | 8.2 °C | 73.15 mm |
| February | -1.7 °C | 10.9 °C | 70.61 mm |
| March | 2.5 °C | 15.8 °C | 111.25 mm |
| April | 7.6 °C | 21.7 °C | 130.81 mm |
| May | 12.8 °C | 25.4 °C | 127 mm |
| June | 17.7 °C | 30.2 °C | 98.55 mm |
| July | 19.7 °C | 32.5 °C | 94.74 mm |
| August | 18.7 °C | 32.2 °C | 81.28 mm |
| September | 14.4 °C | 28.3 °C | 97.79 mm |
| October | 8 °C | 22.4 °C | 91.44 mm |
| November | 2.7 °C | 15.5 °C | 106.93 mm |
| December | -1.8 °C | 9.7 °C | 81.28 mm |
| Annual | 8.1 °C | 21.1 °C | 1164.83 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 |