Chireno, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.4 °C (low) to 25.4 °C (high). Annual precipitation averages 1406.6 Millimeters. Chireno is located in USDA Plant Hardiness Zone 8b. 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 | 2.4 °C | 15.2 °C | 131.32 mm |
| February | 4.2 °C | 17.5 °C | 115.32 mm |
| March | 7.8 °C | 21.3 °C | 126.75 mm |
| April | 11.7 °C | 25.2 °C | 119.63 mm |
| May | 16.9 °C | 29.1 °C | 119.63 mm |
| June | 20.8 °C | 32.4 °C | 131.57 mm |
| July | 22.2 °C | 34.2 °C | 82.8 mm |
| August | 21.8 °C | 34.7 °C | 92.2 mm |
| September | 18.6 °C | 31.8 °C | 98.81 mm |
| October | 12.3 °C | 26.7 °C | 123.44 mm |
| November | 6.9 °C | 20.6 °C | 126.49 mm |
| December | 3.3 °C | 16.1 °C | 138.68 mm |
| Annual | 12.4 °C | 25.4 °C | 1406.64 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |