Cooper, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.9 °C (low) to 24 °C (high). Annual precipitation averages 1168.7 Millimeters. Cooper is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.8 °C | 12.6 °C | 79.76 mm |
| February | 2.8 °C | 14.8 °C | 91.44 mm |
| March | 6.8 °C | 19.1 °C | 109.98 mm |
| April | 10.9 °C | 23.6 °C | 112.01 mm |
| May | 16.3 °C | 27.7 °C | 125.98 mm |
| June | 20.9 °C | 31.9 °C | 94.74 mm |
| July | 22.8 °C | 34.4 °C | 74.68 mm |
| August | 22.2 °C | 34.8 °C | 62.99 mm |
| September | 18.3 °C | 31.2 °C | 83.31 mm |
| October | 12.1 °C | 25.3 °C | 129.29 mm |
| November | 6.4 °C | 18.7 °C | 101.35 mm |
| December | 2.1 °C | 13.7 °C | 103.12 mm |
| Annual | 11.9 °C | 24 °C | 1168.65 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |