Schaller, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.2 °F (low) to 57.5 °F (high). Annual precipitation averages 32.3 Inches. Schaller is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.1 °F | 26.7 °F | 0.76 in. |
| February | 13.2 °F | 31.2 °F | 0.91 in. |
| March | 25.1 °F | 44.8 °F | 1.78 in. |
| April | 36.0 °F | 58.7 °F | 3.5 in. |
| May | 48.7 °F | 70.3 °F | 4.48 in. |
| June | 59.7 °F | 80.4 °F | 5.11 in. |
| July | 63.0 °F | 82.8 °F | 3.46 in. |
| August | 60.2 °F | 80.5 °F | 4.44 in. |
| September | 51.5 °F | 75.2 °F | 2.93 in. |
| October | 38.9 °F | 62.0 °F | 2.31 in. |
| November | 25.9 °F | 45.4 °F | 1.47 in. |
| December | 15.2 °F | 31.8 °F | 1.1 in. |
| Annual | 37.2 °F | 57.5 °F | 32.25 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |