Manhattan, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.5 °C (low) to 19.2 °C (high). Annual precipitation averages 876.3 Millimeters. Manhattan 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 | -7.3 °C | 4.6 °C | 17.53 mm |
| February | -5.4 °C | 7.2 °C | 27.43 mm |
| March | 0 °C | 13.6 °C | 50.55 mm |
| April | 5.8 °C | 19.4 °C | 86.11 mm |
| May | 12 °C | 24.3 °C | 132.08 mm |
| June | 17.7 °C | 29.9 °C | 135.38 mm |
| July | 20.3 °C | 32.5 °C | 111.25 mm |
| August | 18.8 °C | 31.6 °C | 105.66 mm |
| September | 13.9 °C | 27.4 °C | 76.71 mm |
| October | 6.8 °C | 20.8 °C | 66.29 mm |
| November | 0.3 °C | 13.1 °C | 39.62 mm |
| December | -5.3 °C | 6.3 °C | 27.69 mm |
| Annual | 6.5 °C | 19.2 °C | 876.3 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 6b : -20.6°C to -17.8°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 |