Osage City, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7 °C (low) to 19.2 °C (high). Annual precipitation averages 976.4 Millimeters. Osage City is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.7 °C | 4.8 °C | 24.38 mm |
| February | -4.7 °C | 7.4 °C | 38.61 mm |
| March | 0.7 °C | 13.7 °C | 64.01 mm |
| April | 6.2 °C | 19.3 °C | 94.74 mm |
| May | 12.6 °C | 24.3 °C | 145.29 mm |
| June | 17.9 °C | 29.3 °C | 128.27 mm |
| July | 20.2 °C | 32.1 °C | 109.73 mm |
| August | 19.1 °C | 31.3 °C | 106.17 mm |
| September | 14.3 °C | 27.2 °C | 95.76 mm |
| October | 7.2 °C | 20.6 °C | 75.95 mm |
| November | 1 °C | 13.2 °C | 53.85 mm |
| December | -4.4 °C | 6.6 °C | 39.62 mm |
| Annual | 7 °C | 19.2 °C | 976.38 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 |