Linneus, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 17.3 °C (high). Annual precipitation averages 1028.2 Millimeters. Linneus is located in USDA Plant Hardiness Zone 6a. 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 | -8.5 °C | 1.8 °C | 31.5 mm |
| February | -6.3 °C | 4.8 °C | 42.67 mm |
| March | -0.8 °C | 11.4 °C | 67.06 mm |
| April | 5.3 °C | 17.7 °C | 96.52 mm |
| May | 11.4 °C | 23 °C | 138.43 mm |
| June | 16.9 °C | 28 °C | 134.87 mm |
| July | 19.1 °C | 30.4 °C | 125.22 mm |
| August | 17.7 °C | 29.8 °C | 99.82 mm |
| September | 12.8 °C | 25.9 °C | 114.55 mm |
| October | 6.2 °C | 19.1 °C | 79.25 mm |
| November | -0.2 °C | 11.4 °C | 58.17 mm |
| December | -5.7 °C | 4.3 °C | 40.13 mm |
| Annual | 5.7 °C | 17.3 °C | 1028.19 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |