Uncertain, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.1 °C (low) to 24.9 °C (high). Annual precipitation averages 1335.3 Millimeters. Uncertain 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 | 1.6 °C | 14 °C | 110.24 mm |
| February | 3.5 °C | 16.2 °C | 112.01 mm |
| March | 7.3 °C | 20.6 °C | 125.98 mm |
| April | 11.4 °C | 25.1 °C | 127.51 mm |
| May | 16.7 °C | 28.8 °C | 113.54 mm |
| June | 20.9 °C | 32.6 °C | 123.95 mm |
| July | 22.7 °C | 34.6 °C | 81.79 mm |
| August | 22.1 °C | 34.8 °C | 81.03 mm |
| September | 18.3 °C | 31.6 °C | 98.55 mm |
| October | 11.7 °C | 25.8 °C | 124.71 mm |
| November | 6.2 °C | 19.4 °C | 108.46 mm |
| December | 2.6 °C | 14.7 °C | 127.51 mm |
| Annual | 12.1 °C | 24.9 °C | 1335.28 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 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |