Alvord, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.1 °C (low) to 14.1 °C (high). Annual precipitation averages 729 Millimeters. Alvord is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.7 °C | -3.4 °C | 15.24 mm |
| February | -11.2 °C | -0.7 °C | 19.56 mm |
| March | -4.9 °C | 6.4 °C | 38.1 mm |
| April | 1.4 °C | 14.6 °C | 75.69 mm |
| May | 8.5 °C | 21.3 °C | 98.55 mm |
| June | 14.7 °C | 27.1 °C | 118.36 mm |
| July | 16.7 °C | 29.1 °C | 85.09 mm |
| August | 15.2 °C | 27.8 °C | 82.55 mm |
| September | 10.1 °C | 24.1 °C | 77.22 mm |
| October | 2.8 °C | 16.3 °C | 61.21 mm |
| November | -4.4 °C | 6.9 °C | 34.8 mm |
| December | -10.6 °C | -0.8 °C | 22.61 mm |
| Annual | 2.1 °C | 14.1 °C | 728.98 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |