Guion, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 21.7 °C (high). Annual precipitation averages 1264.4 Millimeters. Guion is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.2 °C | 9.2 °C | 85.6 mm |
| February | -1.7 °C | 11.8 °C | 85.34 mm |
| March | 2.7 °C | 16.6 °C | 121.92 mm |
| April | 7.6 °C | 22.2 °C | 134.62 mm |
| May | 13.1 °C | 26.3 °C | 138.43 mm |
| June | 17.9 °C | 30.6 °C | 92.71 mm |
| July | 19.6 °C | 32.9 °C | 98.04 mm |
| August | 18.7 °C | 32.7 °C | 94.23 mm |
| September | 14.6 °C | 28.9 °C | 91.69 mm |
| October | 8 °C | 22.8 °C | 96.01 mm |
| November | 2.4 °C | 16.1 °C | 121.41 mm |
| December | -1.7 °C | 10.3 °C | 104.39 mm |
| Annual | 8.2 °C | 21.7 °C | 1264.39 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |