Big Lake, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 50.9 °F (low) to 77.5 °F (high). Annual precipitation averages 16.9 Inches. Big Lake is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.4 °F | 58.2 °F | 0.74 in. |
| February | 34.8 °F | 63.2 °F | 0.93 in. |
| March | 42.3 °F | 71.0 °F | 1.06 in. |
| April | 49.8 °F | 79.7 °F | 1.17 in. |
| May | 59.6 °F | 86.9 °F | 2.2 in. |
| June | 67.6 °F | 92.4 °F | 2.0 in. |
| July | 69.2 °F | 93.5 °F | 1.47 in. |
| August | 68.9 °F | 93.6 °F | 1.9 in. |
| September | 61.9 °F | 87.2 °F | 2.17 in. |
| October | 52.1 °F | 78.3 °F | 1.39 in. |
| November | 40.5 °F | 66.9 °F | 1.18 in. |
| December | 33.2 °F | 58.8 °F | 0.73 in. |
| Annual | 50.9 °F | 77.5 °F | 16.94 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |