Argyle, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.3 °F (low) to 62.1 °F (high). Annual precipitation averages 39.3 Inches. Argyle is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.4 °F | 33.2 °F | 1.57 in. |
| February | 19.9 °F | 37.9 °F | 1.85 in. |
| March | 30.2 °F | 50.4 °F | 2.5 in. |
| April | 41.2 °F | 63.3 °F | 3.83 in. |
| May | 52.9 °F | 73.4 °F | 5.24 in. |
| June | 62.6 °F | 82.7 °F | 5.0 in. |
| July | 66.3 °F | 86.4 °F | 4.24 in. |
| August | 64.1 °F | 84.9 °F | 3.81 in. |
| September | 55.5 °F | 78.3 °F | 3.72 in. |
| October | 43.8 °F | 65.5 °F | 3.12 in. |
| November | 32.3 °F | 50.6 °F | 2.48 in. |
| December | 22.2 °F | 38.2 °F | 1.89 in. |
| Annual | 42.3 °F | 62.1 °F | 39.25 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |