Sibley, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.4 °C (low) to 18.1 °C (high). Annual precipitation averages 1073.9 Millimeters. Sibley is located in USDA Plant Hardiness Zone 6a. 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 | -7.4 °C | 3.3 °C | 34.29 mm |
| February | -5.2 °C | 6.3 °C | 44.45 mm |
| March | 0.1 °C | 12.4 °C | 66.29 mm |
| April | 5.8 °C | 18.3 °C | 105.41 mm |
| May | 11.9 °C | 23.6 °C | 143.76 mm |
| June | 17.4 °C | 28.7 °C | 137.67 mm |
| July | 19.7 °C | 30.9 °C | 124.21 mm |
| August | 18.4 °C | 30.4 °C | 113.54 mm |
| September | 13.4 °C | 26.2 °C | 112.52 mm |
| October | 6.7 °C | 19.8 °C | 88.9 mm |
| November | 0.4 °C | 11.9 °C | 58.67 mm |
| December | -4.9 °C | 5.6 °C | 44.2 mm |
| Annual | 6.4 °C | 18.1 °C | 1073.91 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |