Inverness, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 45.9 °F (low) to 65.6 °F (high). Annual precipitation averages 33.9 Inches. Inverness is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 41.1 °F | 56.8 °F | 6.6 in. |
| February | 41.9 °F | 58.7 °F | 6.55 in. |
| March | 42.9 °F | 59.9 °F | 4.43 in. |
| April | 44.1 °F | 63.4 °F | 2.49 in. |
| May | 46.8 °F | 66.0 °F | 1.41 in. |
| June | 49.2 °F | 70.3 °F | 0.33 in. |
| July | 51.2 °F | 72.2 °F | 0.02 in. |
| August | 51.9 °F | 73.7 °F | 0.1 in. |
| September | 50.2 °F | 74.4 °F | 0.15 in. |
| October | 47.2 °F | 71.6 °F | 1.69 in. |
| November | 43.6 °F | 63.0 °F | 3.38 in. |
| December | 40.5 °F | 56.8 °F | 6.75 in. |
| Annual | 45.9 °F | 65.6 °F | 33.9 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |