McPherson, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.1 °F (low) to 67.4 °F (high). Annual precipitation averages 32.5 Inches. McPherson 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.4 °F | 42.0 °F | 0.84 in. |
| February | 23.4 °F | 46.0 °F | 1.22 in. |
| March | 32.9 °F | 56.9 °F | 2.29 in. |
| April | 42.1 °F | 66.5 °F | 2.87 in. |
| May | 53.4 °F | 76.1 °F | 5.33 in. |
| June | 64.0 °F | 87.2 °F | 4.36 in. |
| July | 68.4 °F | 91.8 °F | 4.05 in. |
| August | 66.5 °F | 90.0 °F | 3.6 in. |
| September | 57.9 °F | 82.4 °F | 2.81 in. |
| October | 44.9 °F | 70.0 °F | 2.43 in. |
| November | 32.4 °F | 55.8 °F | 1.48 in. |
| December | 23.1 °F | 43.8 °F | 1.21 in. |
| Annual | 44.1 °F | 67.4 °F | 32.49 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |