Hiouchi, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 45.6 °F (low) to 60.2 °F (high). Annual precipitation averages 81.1 Inches. Hiouchi 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 Jan. 11 - Jan. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 41.1 °F | 53.5 °F | 13.4 in. |
| February | 41.0 °F | 55.2 °F | 11.08 in. |
| March | 41.5 °F | 56.9 °F | 10.86 in. |
| April | 43.1 °F | 58.0 °F | 7.91 in. |
| May | 46.5 °F | 61.2 °F | 3.88 in. |
| June | 49.3 °F | 64.1 °F | 1.79 in. |
| July | 51.9 °F | 65.9 °F | 0.25 in. |
| August | 52.4 °F | 66.9 °F | 0.37 in. |
| September | 50.2 °F | 66.8 °F | 1.35 in. |
| October | 46.9 °F | 64.1 °F | 5.06 in. |
| November | 43.3 °F | 56.9 °F | 10.09 in. |
| December | 40.5 °F | 53.2 °F | 15.06 in. |
| Annual | 45.6 °F | 60.2 °F | 81.1 in. |
| Average First Frost Date | Jan. 11 - Jan. 20 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |