Chester, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.1 °C (low) to 21.5 °C (high). Annual precipitation averages 1382.5 Millimeters. Chester 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 | -2.4 °C | 9.2 °C | 92.96 mm |
| February | -0.6 °C | 11.8 °C | 74.68 mm |
| March | 3.7 °C | 16.3 °C | 114.55 mm |
| April | 8.5 °C | 21.8 °C | 132.59 mm |
| May | 13.7 °C | 25.7 °C | 157.48 mm |
| June | 18.4 °C | 30.1 °C | 117.6 mm |
| July | 20.5 °C | 32.7 °C | 104.39 mm |
| August | 19.7 °C | 32.7 °C | 99.57 mm |
| September | 15.7 °C | 28.6 °C | 128.27 mm |
| October | 9.3 °C | 22.7 °C | 123.19 mm |
| November | 3.7 °C | 15.8 °C | 138.18 mm |
| December | -0.8 °C | 10.3 °C | 99.06 mm |
| Annual | 9.1 °C | 21.5 °C | 1382.52 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 |