Palmer, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.8 °C (low) to 18.3 °C (high). Annual precipitation averages 795 Millimeters. Palmer is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.1 °C | 3.3 °C | 17.27 mm |
| February | -6.1 °C | 5.9 °C | 24.89 mm |
| March | -0.6 °C | 12.6 °C | 47.75 mm |
| April | 4.9 °C | 18.2 °C | 71.88 mm |
| May | 11.3 °C | 23.7 °C | 116.59 mm |
| June | 17.1 °C | 29.3 °C | 112.01 mm |
| July | 19.6 °C | 31.9 °C | 114.55 mm |
| August | 18.4 °C | 30.8 °C | 93.73 mm |
| September | 13.2 °C | 26.7 °C | 77.72 mm |
| October | 6.3 °C | 19.9 °C | 57.66 mm |
| November | -0.7 °C | 11.7 °C | 34.54 mm |
| December | -5.8 °C | 5.1 °C | 26.42 mm |
| Annual | 5.8 °C | 18.3 °C | 795.01 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°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 |