Altamont, Kansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.6 °F (low) to 67.7 °F (high). Annual precipitation averages 46 Inches. Altamont is located in USDA Plant Hardiness Zone 7a. 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 | 23.1 °F | 43.5 °F | 1.57 in. |
| February | 26.9 °F | 48.5 °F | 1.75 in. |
| March | 35.7 °F | 58.2 °F | 3.16 in. |
| April | 45.6 °F | 67.4 °F | 4.87 in. |
| May | 56.2 °F | 75.7 °F | 7.29 in. |
| June | 65.6 °F | 84.7 °F | 5.56 in. |
| July | 69.6 °F | 89.7 °F | 4.12 in. |
| August | 67.7 °F | 89.3 °F | 4.07 in. |
| September | 59.2 °F | 81.4 °F | 4.61 in. |
| October | 47.1 °F | 70.1 °F | 3.97 in. |
| November | 35.9 °F | 57.5 °F | 2.78 in. |
| December | 27.1 °F | 46.6 °F | 2.2 in. |
| Annual | 46.6 °F | 67.7 °F | 45.95 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |