Bunker, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.4 °C (low) to 19.1 °C (high). Annual precipitation averages 1188.2 Millimeters. Bunker 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.1 °C | 5.7 °C | 70.36 mm |
| February | -2.9 °C | 8.7 °C | 75.95 mm |
| March | 1.6 °C | 13.8 °C | 102.87 mm |
| April | 7.2 °C | 20 °C | 134.37 mm |
| May | 12.3 °C | 24.1 °C | 129.79 mm |
| June | 17 °C | 28.3 °C | 114.81 mm |
| July | 18.9 °C | 30.6 °C | 100.08 mm |
| August | 18.1 °C | 30.3 °C | 88.39 mm |
| September | 13.9 °C | 26.3 °C | 101.35 mm |
| October | 7.8 °C | 20.4 °C | 80.01 mm |
| November | 2.2 °C | 13.3 °C | 109.98 mm |
| December | -2.8 °C | 7.4 °C | 80.26 mm |
| Annual | 7.4 °C | 19.1 °C | 1188.22 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |