Andover, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.3 °F (low) to 67.3 °F (high). Annual precipitation averages 36.4 Inches. Andover is located in USDA Plant Hardiness Zone 7a. 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 | 21.8 °F | 42.6 °F | 0.88 in. |
| February | 24.6 °F | 47.2 °F | 1.41 in. |
| March | 34.0 °F | 57.7 °F | 2.5 in. |
| April | 43.7 °F | 66.8 °F | 3.33 in. |
| May | 54.8 °F | 75.3 °F | 5.63 in. |
| June | 64.7 °F | 85.6 °F | 5.26 in. |
| July | 68.8 °F | 90.3 °F | 4.19 in. |
| August | 67.1 °F | 88.9 °F | 4.1 in. |
| September | 58.8 °F | 81.9 °F | 3.11 in. |
| October | 46.1 °F | 69.9 °F | 2.98 in. |
| November | 34.1 °F | 56.4 °F | 1.73 in. |
| December | 24.6 °F | 44.6 °F | 1.3 in. |
| Annual | 45.3 °F | 67.3 °F | 36.42 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |