Altoona, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.7 °C (low) to 20.1 °C (high). Annual precipitation averages 1085.9 Millimeters. Altoona 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 | -5.6 °C | 6.3 °C | 35.05 mm |
| February | -3.6 °C | 9.1 °C | 41.91 mm |
| March | 1.6 °C | 14.7 °C | 69.85 mm |
| April | 7.1 °C | 20.1 °C | 113.54 mm |
| May | 13.1 °C | 24.7 °C | 159.77 mm |
| June | 18.4 °C | 29.7 °C | 146.3 mm |
| July | 20.7 °C | 32.6 °C | 106.93 mm |
| August | 19.7 °C | 32.3 °C | 101.35 mm |
| September | 14.7 °C | 27.8 °C | 105.41 mm |
| October | 7.7 °C | 21.6 °C | 97.54 mm |
| November | 1.5 °C | 14.3 °C | 60.71 mm |
| December | -3.5 °C | 8 °C | 47.5 mm |
| Annual | 7.7 °C | 20.1 °C | 1085.86 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |