Garden Plain, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.8 °C (low) to 19.8 °C (high). Annual precipitation averages 840.2 Millimeters. Garden Plain is located in USDA Plant Hardiness Zone 7a. 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 | -5.1 °C | 6.1 °C | 21.08 mm |
| February | -3.5 °C | 8.4 °C | 33.02 mm |
| March | 1.8 °C | 14.2 °C | 60.45 mm |
| April | 6.8 °C | 19.4 °C | 73.66 mm |
| May | 12.9 °C | 24.6 °C | 130.56 mm |
| June | 18.5 °C | 30.4 °C | 119.89 mm |
| July | 20.8 °C | 33 °C | 100.33 mm |
| August | 19.9 °C | 32.1 °C | 97.03 mm |
| September | 15.4 °C | 27.9 °C | 65.02 mm |
| October | 8.4 °C | 21.2 °C | 72.64 mm |
| November | 1.7 °C | 13.6 °C | 36.07 mm |
| December | -3.6 °C | 7.1 °C | 30.48 mm |
| Annual | 7.8 °C | 19.8 °C | 840.23 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |