Alvord, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.7 °F (low) to 57.3 °F (high). Annual precipitation averages 28.7 Inches. 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 | 7.4 °F | 25.8 °F | 0.6 in. |
| February | 11.8 °F | 30.8 °F | 0.77 in. |
| March | 23.2 °F | 43.5 °F | 1.5 in. |
| April | 34.6 °F | 58.2 °F | 2.98 in. |
| May | 47.3 °F | 70.4 °F | 3.88 in. |
| June | 58.5 °F | 80.7 °F | 4.66 in. |
| July | 62.0 °F | 84.3 °F | 3.35 in. |
| August | 59.4 °F | 82.0 °F | 3.25 in. |
| September | 50.1 °F | 75.3 °F | 3.04 in. |
| October | 37.1 °F | 61.4 °F | 2.41 in. |
| November | 24.1 °F | 44.5 °F | 1.37 in. |
| December | 13.0 °F | 30.6 °F | 0.89 in. |
| Annual | 35.7 °F | 57.3 °F | 28.7 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |