Middlebury, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.6 °C (low) to 14.9 °C (high). Annual precipitation averages 984.8 Millimeters. Middlebury is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.3 °C | -0.3 °C | 63.75 mm |
| February | -7.3 °C | 1.5 °C | 51.82 mm |
| March | -2.6 °C | 7.7 °C | 57.91 mm |
| April | 3.4 °C | 14.8 °C | 90.68 mm |
| May | 9.9 °C | 21.2 °C | 109.98 mm |
| June | 15.2 °C | 26.3 °C | 106.43 mm |
| July | 16.8 °C | 28.2 °C | 100.33 mm |
| August | 15.8 °C | 27.2 °C | 103.12 mm |
| September | 11.7 °C | 23.9 °C | 83.57 mm |
| October | 5.5 °C | 16.7 °C | 88.39 mm |
| November | -0.1 °C | 8.9 °C | 70.61 mm |
| December | -4.9 °C | 2.4 °C | 58.17 mm |
| Annual | 4.6 °C | 14.9 °C | 984.76 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°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 |