Mountain Gate, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 48.8 °F (low) to 74.5 °F (high). Annual precipitation averages 62.4 Inches. Mountain Gate 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 | 37.4 °F | 55.3 °F | 11.15 in. |
| February | 38.8 °F | 59.0 °F | 10.85 in. |
| March | 41.2 °F | 63.7 °F | 9.75 in. |
| April | 44.8 °F | 69.6 °F | 4.64 in. |
| May | 51.8 °F | 78.9 °F | 2.68 in. |
| June | 58.7 °F | 88.1 °F | 1.32 in. |
| July | 63.9 °F | 97.3 °F | 0.11 in. |
| August | 62.1 °F | 96.3 °F | 0.16 in. |
| September | 57.5 °F | 90.6 °F | 0.59 in. |
| October | 49.9 °F | 78.0 °F | 2.79 in. |
| November | 41.9 °F | 62.9 °F | 6.67 in. |
| December | 37.2 °F | 54.4 °F | 11.64 in. |
| Annual | 48.8 °F | 74.5 °F | 62.35 in. |
| Average First Frost Date | Jan. 11 - Jan. 20 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |