Le Grand, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 9.2 °C (low) to 24.1 °C (high). Annual precipitation averages 339.6 Millimeters. Le Grand is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.3 °C | 13.1 °C | 70.36 mm |
| February | 4.6 °C | 16.2 °C | 62.48 mm |
| March | 6.1 °C | 19.3 °C | 54.1 mm |
| April | 7.7 °C | 22.6 °C | 27.94 mm |
| May | 10.9 °C | 27.1 °C | 14.99 mm |
| June | 14.1 °C | 31.8 °C | 3.05 mm |
| July | 16.6 °C | 34.7 °C | 1.02 mm |
| August | 16 °C | 34.1 °C | 0.76 mm |
| September | 13.9 °C | 31.8 °C | 1.52 mm |
| October | 9.7 °C | 26.3 °C | 16.26 mm |
| November | 5.3 °C | 18.7 °C | 28.96 mm |
| December | 2.7 °C | 13.3 °C | 58.17 mm |
| Annual | 9.2 °C | 24.1 °C | 339.61 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |