Monterey, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 9.4 °C (low) to 17.3 °C (high). Annual precipitation averages 445.8 Millimeters. Monterey is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.7 °C | 15.3 °C | 96.52 mm |
| February | 7.2 °C | 15.4 °C | 86.36 mm |
| March | 7.6 °C | 15.8 °C | 66.29 mm |
| April | 8.2 °C | 15.7 °C | 32.26 mm |
| May | 9.8 °C | 17.2 °C | 12.7 mm |
| June | 11.1 °C | 18.1 °C | 3.3 mm |
| July | 12.3 °C | 18.3 °C | 1.02 mm |
| August | 12.6 °C | 19.2 °C | 1.02 mm |
| September | 12.1 °C | 19.7 °C | 1.78 mm |
| October | 10.5 °C | 19.8 °C | 20.07 mm |
| November | 8.2 °C | 17.3 °C | 40.64 mm |
| December | 6.4 °C | 15.3 °C | 83.82 mm |
| Annual | 9.4 °C | 17.3 °C | 445.78 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 10a : -1.1°C to 1.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |