Linn, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.1 °F (low) to 64.4 °F (high). Annual precipitation averages 31.6 Inches. Linn 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 | 17.4 °F | 37.5 °F | 0.7 in. |
| February | 20.8 °F | 42.0 °F | 1.01 in. |
| March | 30.5 °F | 54.1 °F | 1.88 in. |
| April | 40.4 °F | 64.3 °F | 2.91 in. |
| May | 51.9 °F | 74.2 °F | 4.63 in. |
| June | 62.3 °F | 84.3 °F | 4.49 in. |
| July | 66.9 °F | 88.9 °F | 4.46 in. |
| August | 64.8 °F | 86.9 °F | 3.66 in. |
| September | 55.5 °F | 79.8 °F | 3.08 in. |
| October | 43.0 °F | 67.5 °F | 2.34 in. |
| November | 30.3 °F | 52.5 °F | 1.4 in. |
| December | 21.3 °F | 40.5 °F | 1.07 in. |
| Annual | 42.1 °F | 64.4 °F | 31.63 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |