Chester, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.2 °C (low) to 25.9 °C (high). Annual precipitation averages 1421.1 Millimeters. Chester is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.4 °C | 16.2 °C | 126.24 mm |
| February | 5.6 °C | 18.4 °C | 105.16 mm |
| March | 9 °C | 22.1 °C | 115.32 mm |
| April | 12.7 °C | 25.7 °C | 110.24 mm |
| May | 17.4 °C | 29.5 °C | 123.19 mm |
| June | 20.9 °C | 32.8 °C | 135.13 mm |
| July | 22.2 °C | 34.4 °C | 98.81 mm |
| August | 21.9 °C | 34.7 °C | 112.01 mm |
| September | 19.2 °C | 31.9 °C | 103.63 mm |
| October | 13.3 °C | 27.2 °C | 131.83 mm |
| November | 8.1 °C | 21.3 °C | 123.44 mm |
| December | 4.4 °C | 16.9 °C | 136.14 mm |
| Annual | 13.2 °C | 25.9 °C | 1421.14 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |