Mount Laguna, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 5 °C (low) to 18.8 °C (high). Annual precipitation averages 487.4 Millimeters. Mount Laguna is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.2 °C | 10.6 °C | 92.46 mm |
| February | -0.7 °C | 10.3 °C | 117.86 mm |
| March | 0.8 °C | 12.9 °C | 71.63 mm |
| April | 2.3 °C | 16.4 °C | 30.48 mm |
| May | 5.1 °C | 20.6 °C | 12.7 mm |
| June | 9.3 °C | 26.2 °C | 0.76 mm |
| July | 12.7 °C | 29.1 °C | 14.73 mm |
| August | 13.1 °C | 28.7 °C | 17.53 mm |
| September | 10.1 °C | 25.9 °C | 14.73 mm |
| October | 5.9 °C | 20.6 °C | 16.26 mm |
| November | 2.2 °C | 14.4 °C | 32 mm |
| December | -0.2 °C | 10.4 °C | 66.29 mm |
| Annual | 5 °C | 18.8 °C | 487.43 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |