Danbury, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 16.1 °C (low) to 26.2 °C (high). Annual precipitation averages 1357.9 Millimeters. Danbury is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.9 °C | 17.5 °C | 108.97 mm |
| February | 9.1 °C | 19.3 °C | 74.93 mm |
| March | 12.2 °C | 22.5 °C | 83.06 mm |
| April | 15.7 °C | 25.8 °C | 96.01 mm |
| May | 20.1 °C | 29.2 °C | 117.35 mm |
| June | 23.1 °C | 32.3 °C | 132.84 mm |
| July | 23.8 °C | 33.3 °C | 110.24 mm |
| August | 23.8 °C | 33.8 °C | 136.65 mm |
| September | 21.7 °C | 31.7 °C | 161.54 mm |
| October | 17.1 °C | 28 °C | 122.43 mm |
| November | 11.8 °C | 22.8 °C | 106.43 mm |
| December | 8 °C | 18.7 °C | 107.44 mm |
| Annual | 16.1 °C | 26.2 °C | 1357.89 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |