Little River, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 8.8 °C (low) to 15.6 °C (high). Annual precipitation averages 1042.7 Millimeters. Little River is located in USDA Plant Hardiness Zone 10a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7 °C | 13 °C | 184.4 mm |
| February | 7 °C | 12.9 °C | 164.85 mm |
| March | 7.2 °C | 13.2 °C | 152.65 mm |
| April | 7.6 °C | 14.9 °C | 78.74 mm |
| May | 9 °C | 16.1 °C | 50.04 mm |
| June | 10.2 °C | 17.2 °C | 16 mm |
| July | 10.7 °C | 17.6 °C | 2.03 mm |
| August | 11.2 °C | 18.1 °C | 5.33 mm |
| September | 10.8 °C | 18.4 °C | 7.11 mm |
| October | 9.8 °C | 17.6 °C | 55.63 mm |
| November | 8.2 °C | 14.6 °C | 114.81 mm |
| December | 6.9 °C | 13.6 °C | 211.07 mm |
| Annual | 8.8 °C | 15.6 °C | 1042.66 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |