Baxter, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.7 °C (low) to 14.9 °C (high). Annual precipitation averages 928.4 Millimeters. Baxter is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.6 °C | -1.9 °C | 24.64 mm |
| February | -9.3 °C | 0.6 °C | 30.23 mm |
| March | -3.2 °C | 7.9 °C | 52.07 mm |
| April | 3.1 °C | 15.7 °C | 96.27 mm |
| May | 10 °C | 21.7 °C | 127 mm |
| June | 15.6 °C | 26.9 °C | 136.4 mm |
| July | 17.8 °C | 28.8 °C | 109.73 mm |
| August | 16.4 °C | 27.7 °C | 110.49 mm |
| September | 11.4 °C | 24.4 °C | 89.66 mm |
| October | 4.6 °C | 17 °C | 67.06 mm |
| November | -2.3 °C | 8.4 °C | 49.28 mm |
| December | -8.1 °C | 1.1 °C | 35.56 mm |
| Annual | 3.7 °C | 14.9 °C | 928.39 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |