Hamilton, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.4 °F (low) to 67.1 °F (high). Annual precipitation averages 37.9 Inches. Hamilton 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 | 20.0 °F | 41.8 °F | 0.88 in. |
| February | 23.7 °F | 46.8 °F | 1.46 in. |
| March | 33.2 °F | 57.4 °F | 2.45 in. |
| April | 43.4 °F | 67.3 °F | 3.63 in. |
| May | 54.4 °F | 75.3 °F | 5.49 in. |
| June | 64.1 °F | 84.6 °F | 5.28 in. |
| July | 68.3 °F | 89.7 °F | 4.34 in. |
| August | 66.3 °F | 89.2 °F | 3.73 in. |
| September | 57.7 °F | 81.4 °F | 3.87 in. |
| October | 44.9 °F | 69.8 °F | 3.15 in. |
| November | 33.5 °F | 56.6 °F | 2.18 in. |
| December | 23.8 °F | 45.1 °F | 1.48 in. |
| Annual | 44.4 °F | 67.1 °F | 37.94 in. |
| 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |