Adrian, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7 °C (low) to 18.9 °C (high). Annual precipitation averages 1104.2 Millimeters. Adrian is located in USDA Plant Hardiness Zone 6b. 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 | -6.4 °C | 4.7 °C | 39.37 mm |
| February | -4.4 °C | 7.3 °C | 49.28 mm |
| March | 0.8 °C | 13.2 °C | 72.14 mm |
| April | 6.3 °C | 19 °C | 115.06 mm |
| May | 12.4 °C | 24 °C | 152.15 mm |
| June | 17.8 °C | 28.9 °C | 139.95 mm |
| July | 20.2 °C | 31.6 °C | 115.57 mm |
| August | 18.9 °C | 31 °C | 100.84 mm |
| September | 14 °C | 26.9 °C | 110.24 mm |
| October | 7.3 °C | 20.5 °C | 88.65 mm |
| November | 1.1 °C | 13.1 °C | 68.83 mm |
| December | -4.1 °C | 6.7 °C | 52.07 mm |
| Annual | 7 °C | 18.9 °C | 1104.15 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 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 |