Ridgeway, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.8 °C (low) to 16.3 °C (high). Annual precipitation averages 993.9 Millimeters. Ridgeway is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.8 °C | 0.6 °C | 25.15 mm |
| February | -7.5 °C | 3.4 °C | 36.58 mm |
| March | -1.7 °C | 10.3 °C | 57.91 mm |
| April | 4.2 °C | 16.7 °C | 99.57 mm |
| May | 10.7 °C | 22.2 °C | 141.22 mm |
| June | 16.2 °C | 27.4 °C | 135.38 mm |
| July | 18.4 °C | 29.8 °C | 118.62 mm |
| August | 17.2 °C | 29 °C | 108.97 mm |
| September | 12.2 °C | 24.9 °C | 100.58 mm |
| October | 5.4 °C | 18.1 °C | 78.74 mm |
| November | -1.1 °C | 10 °C | 51.56 mm |
| December | -6.8 °C | 3.2 °C | 39.62 mm |
| Annual | 4.8 °C | 16.3 °C | 993.9 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |