Monon, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.8 °C (low) to 15.8 °C (high). Annual precipitation averages 1028.7 Millimeters. Monon is located in USDA Plant Hardiness Zone 5b. 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 | -8.5 °C | 0.2 °C | 65.02 mm |
| February | -6.9 °C | 2.6 °C | 53.85 mm |
| March | -1.8 °C | 8.9 °C | 68.07 mm |
| April | 3.9 °C | 16.2 °C | 97.28 mm |
| May | 10.2 °C | 22.3 °C | 107.44 mm |
| June | 15.6 °C | 27.2 °C | 122.43 mm |
| July | 17.1 °C | 28.6 °C | 119.89 mm |
| August | 16.1 °C | 27.8 °C | 101.35 mm |
| September | 11.7 °C | 25.1 °C | 81.28 mm |
| October | 5.4 °C | 18.1 °C | 80.77 mm |
| November | -0.2 °C | 9.8 °C | 71.88 mm |
| December | -5.2 °C | 3.1 °C | 59.44 mm |
| Annual | 4.8 °C | 15.8 °C | 1028.7 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 5b : -26.1°C to -23.3°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 |