Dayton, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 15.4 °C (low) to 26 °C (high). Annual precipitation averages 1566.4 Millimeters. Dayton is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.1 °C | 16.9 °C | 123.19 mm |
| February | 8.1 °C | 19 °C | 97.79 mm |
| March | 11.6 °C | 22.3 °C | 102.11 mm |
| April | 15.1 °C | 25.7 °C | 113.79 mm |
| May | 19.4 °C | 29.3 °C | 144.78 mm |
| June | 22.8 °C | 32.4 °C | 141.99 mm |
| July | 23.8 °C | 33.7 °C | 120.14 mm |
| August | 23.6 °C | 34.1 °C | 153.42 mm |
| September | 21 °C | 31.7 °C | 151.13 mm |
| October | 15.8 °C | 27.6 °C | 165.61 mm |
| November | 10.3 °C | 21.9 °C | 121.67 mm |
| December | 7.1 °C | 17.8 °C | 130.81 mm |
| Annual | 15.4 °C | 26 °C | 1566.43 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| 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 |