Sibley, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.5 °F (low) to 64.6 °F (high). Annual precipitation averages 42.3 Inches. 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 | 18.6 °F | 37.9 °F | 1.35 in. |
| February | 22.7 °F | 43.4 °F | 1.75 in. |
| March | 32.2 °F | 54.4 °F | 2.61 in. |
| April | 42.4 °F | 65.0 °F | 4.15 in. |
| May | 53.4 °F | 74.5 °F | 5.66 in. |
| June | 63.4 °F | 83.6 °F | 5.42 in. |
| July | 67.5 °F | 87.7 °F | 4.89 in. |
| August | 65.1 °F | 86.7 °F | 4.47 in. |
| September | 56.1 °F | 79.1 °F | 4.43 in. |
| October | 44.1 °F | 67.6 °F | 3.5 in. |
| November | 32.7 °F | 53.5 °F | 2.31 in. |
| December | 23.2 °F | 42.0 °F | 1.74 in. |
| Annual | 43.5 °F | 64.6 °F | 42.28 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |