Rich Hill, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.3 °C (low) to 19.4 °C (high). Annual precipitation averages 1125.7 Millimeters. Rich Hill is located in USDA Plant Hardiness Zone 6b. 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 | -5.9 °C | 5.2 °C | 39.62 mm |
| February | -3.9 °C | 8.2 °C | 52.83 mm |
| March | 1.2 °C | 13.9 °C | 75.69 mm |
| April | 6.7 °C | 19.6 °C | 118.62 mm |
| May | 12.6 °C | 24.4 °C | 160.53 mm |
| June | 18 °C | 29.3 °C | 144.53 mm |
| July | 20.3 °C | 32 °C | 111.51 mm |
| August | 19.1 °C | 31.4 °C | 95.5 mm |
| September | 14.2 °C | 27.3 °C | 110.24 mm |
| October | 7.6 °C | 21 °C | 86.61 mm |
| November | 1.5 °C | 13.6 °C | 74.93 mm |
| December | -3.6 °C | 7.3 °C | 55.12 mm |
| Annual | 7.3 °C | 19.4 °C | 1125.73 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 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 |