Reserve, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.2 °C (low) to 17.6 °C (high). Annual precipitation averages 890.3 Millimeters. Reserve 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 | -9.1 °C | 1.8 °C | 19.81 mm |
| February | -6.9 °C | 4.9 °C | 29.46 mm |
| March | -1.2 °C | 11.8 °C | 53.09 mm |
| April | 4.7 °C | 18.1 °C | 90.42 mm |
| May | 11.3 °C | 23.7 °C | 128.27 mm |
| June | 16.9 °C | 28.8 °C | 121.16 mm |
| July | 18.8 °C | 30.9 °C | 118.62 mm |
| August | 17.6 °C | 30.1 °C | 97.79 mm |
| September | 12.4 °C | 26.3 °C | 83.82 mm |
| October | 5.7 °C | 19.7 °C | 71.12 mm |
| November | -1.3 °C | 11.3 °C | 45.47 mm |
| December | -6.8 °C | 4 °C | 31.24 mm |
| Annual | 5.2 °C | 17.6 °C | 890.27 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 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 |