Amazonia, 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 18 °C (high). Annual precipitation averages 939.5 Millimeters. Amazonia 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.5 °C | 2.4 °C | 23.62 mm |
| February | -6.4 °C | 5.3 °C | 32 mm |
| March | -0.6 °C | 12.3 °C | 57.91 mm |
| April | 5.3 °C | 18.4 °C | 92.96 mm |
| May | 11.8 °C | 24 °C | 129.03 mm |
| June | 17.4 °C | 29 °C | 129.79 mm |
| July | 19.4 °C | 31 °C | 122.94 mm |
| August | 17.9 °C | 30.2 °C | 97.79 mm |
| September | 13.1 °C | 26.6 °C | 89.15 mm |
| October | 5.9 °C | 19.8 °C | 78.74 mm |
| November | -0.4 °C | 12 °C | 47.5 mm |
| December | -6.2 °C | 4.8 °C | 38.1 mm |
| Annual | 5.7 °C | 18 °C | 939.53 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |