Tracy, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 9.5 °C (low) to 23.4 °C (high). Annual precipitation averages 268.7 Millimeters. Tracy is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.1 °C | 13.1 °C | 57.66 mm |
| February | 5.4 °C | 16 °C | 47.24 mm |
| March | 6.9 °C | 19.1 °C | 37.08 mm |
| April | 8.6 °C | 22.2 °C | 19.56 mm |
| May | 11.3 °C | 26.1 °C | 13.97 mm |
| June | 13.7 °C | 30.3 °C | 2.54 mm |
| July | 14.9 °C | 33.1 °C | 0 mm |
| August | 14.7 °C | 32.5 °C | 0.51 mm |
| September | 13.4 °C | 30.6 °C | 1.78 mm |
| October | 10.3 °C | 25.6 °C | 14.48 mm |
| November | 6.3 °C | 18.4 °C | 24.64 mm |
| December | 3.8 °C | 13.3 °C | 49.28 mm |
| Annual | 9.5 °C | 23.4 °C | 268.74 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| 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 |