San Angelo, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 11.1 °C (low) to 25.9 °C (high). Annual precipitation averages 544.6 Millimeters. San Angelo is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.2 °C | 15.3 °C | 24.89 mm |
| February | 2 °C | 17.7 °C | 32.26 mm |
| March | 6.3 °C | 21.9 °C | 36.58 mm |
| April | 10.3 °C | 26.8 °C | 37.59 mm |
| May | 16.2 °C | 30.7 °C | 66.29 mm |
| June | 20.4 °C | 34 °C | 67.82 mm |
| July | 21.8 °C | 35.4 °C | 43.43 mm |
| August | 21.4 °C | 35.2 °C | 60.2 mm |
| September | 17.4 °C | 31.3 °C | 64.26 mm |
| October | 11.4 °C | 26.4 °C | 58.42 mm |
| November | 5.1 °C | 20.2 °C | 30.99 mm |
| December | 0.6 °C | 15.9 °C | 21.84 mm |
| Annual | 11.1 °C | 25.9 °C | 544.57 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |