Selma, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 9.9 °C (low) to 24.8 °C (high). Annual precipitation averages 292.9 Millimeters. Selma is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.3 °C | 13.4 °C | 61.47 mm |
| February | 4.8 °C | 16.7 °C | 52.32 mm |
| March | 6.6 °C | 20.1 °C | 50.29 mm |
| April | 8.3 °C | 23.2 °C | 25.65 mm |
| May | 11.9 °C | 27.9 °C | 11.94 mm |
| June | 15.1 °C | 32.6 °C | 3.81 mm |
| July | 18.1 °C | 35.9 °C | 0.76 mm |
| August | 17.2 °C | 35.5 °C | 0.25 mm |
| September | 14.7 °C | 32.5 °C | 2.29 mm |
| October | 10.4 °C | 26.6 °C | 12.7 mm |
| November | 5.4 °C | 19.1 °C | 24.13 mm |
| December | 2.6 °C | 13.5 °C | 47.24 mm |
| Annual | 9.9 °C | 24.8 °C | 292.85 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| 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 | BSk - Cold Semi-Arid Climate |