Republic, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.4 °C (low) to 19.4 °C (high). Annual precipitation averages 1176 Millimeters. Republic 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 | -4.9 °C | 6.2 °C | 65.28 mm |
| February | -3.1 °C | 8.8 °C | 61.21 mm |
| March | 1.5 °C | 14.1 °C | 100.58 mm |
| April | 6.7 °C | 19.5 °C | 115.82 mm |
| May | 12.4 °C | 23.8 °C | 148.84 mm |
| June | 17.4 °C | 28.6 °C | 114.55 mm |
| July | 19.7 °C | 31.2 °C | 104.9 mm |
| August | 18.7 °C | 31.1 °C | 88.39 mm |
| September | 14.3 °C | 27.1 °C | 116.84 mm |
| October | 7.8 °C | 20.7 °C | 90.42 mm |
| November | 1.7 °C | 13.7 °C | 96.01 mm |
| December | -2.9 °C | 8 °C | 73.15 mm |
| Annual | 7.4 °C | 19.4 °C | 1175.99 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 |