Manito, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.5 °C (low) to 17.2 °C (high). Annual precipitation averages 990.6 Millimeters. Manito 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 | -8.3 °C | 1.1 °C | 51.82 mm |
| February | -6.4 °C | 3.8 °C | 49.28 mm |
| March | -0.9 °C | 10.6 °C | 64.52 mm |
| April | 4.9 °C | 17.7 °C | 99.31 mm |
| May | 11.6 °C | 23.6 °C | 123.44 mm |
| June | 16.7 °C | 28.6 °C | 117.09 mm |
| July | 18.4 °C | 30.3 °C | 103.38 mm |
| August | 17.1 °C | 29.4 °C | 89.66 mm |
| September | 12.4 °C | 26.6 °C | 87.12 mm |
| October | 5.8 °C | 19.4 °C | 78.99 mm |
| November | -0.1 °C | 10.9 °C | 70.36 mm |
| December | -5.2 °C | 4 °C | 55.63 mm |
| Annual | 5.5 °C | 17.2 °C | 990.6 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 |