Perrin, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.2 °C (low) to 24.7 °C (high). Annual precipitation averages 848.9 Millimeters. Perrin 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.4 °C | 13.6 °C | 42.67 mm |
| February | 1.6 °C | 15.7 °C | 60.96 mm |
| March | 5.9 °C | 20.2 °C | 81.03 mm |
| April | 10.3 °C | 24.4 °C | 65.28 mm |
| May | 15.9 °C | 28.4 °C | 104.39 mm |
| June | 20.6 °C | 32.7 °C | 97.54 mm |
| July | 22.7 °C | 35.4 °C | 50.04 mm |
| August | 22.3 °C | 35.4 °C | 70.61 mm |
| September | 18 °C | 31.2 °C | 77.47 mm |
| October | 11.6 °C | 25.6 °C | 90.17 mm |
| November | 5.4 °C | 19.2 °C | 59.69 mm |
| December | 0.8 °C | 14.2 °C | 49.02 mm |
| Annual | 11.2 °C | 24.7 °C | 848.87 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |