Oyster Creek, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 17.2 °C (low) to 25.9 °C (high). Annual precipitation averages 1196.9 Millimeters. Oyster Creek is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.8 °C | 17.5 °C | 102.36 mm |
| February | 9.8 °C | 19.1 °C | 66.04 mm |
| March | 13.2 °C | 22.1 °C | 74.42 mm |
| April | 16.8 °C | 25.2 °C | 76.71 mm |
| May | 21.1 °C | 28.6 °C | 94.74 mm |
| June | 24.2 °C | 31.6 °C | 113.54 mm |
| July | 25.1 °C | 32.6 °C | 93.98 mm |
| August | 25 °C | 33.1 °C | 127 mm |
| September | 22.8 °C | 31.1 °C | 151.89 mm |
| October | 18.6 °C | 27.6 °C | 100.33 mm |
| November | 13.2 °C | 22.8 °C | 104.65 mm |
| December | 8.9 °C | 18.9 °C | 91.19 mm |
| Annual | 17.2 °C | 25.9 °C | 1196.85 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 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |