Monterey Park, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 12.7 °C (low) to 25.5 °C (high). Annual precipitation averages 430.3 Millimeters. Monterey Park is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.2 °C | 20.5 °C | 100.58 mm |
| February | 8.7 °C | 20.5 °C | 110.49 mm |
| March | 9.9 °C | 21.6 °C | 73.15 mm |
| April | 11.3 °C | 24.6 °C | 22.61 mm |
| May | 13.6 °C | 25.6 °C | 9.91 mm |
| June | 15.5 °C | 27.9 °C | 3.05 mm |
| July | 17.4 °C | 30.6 °C | 1.02 mm |
| August | 17.8 °C | 31.8 °C | 0.51 mm |
| September | 17 °C | 31.2 °C | 3.56 mm |
| October | 14.3 °C | 28 °C | 15.24 mm |
| November | 10.4 °C | 23.7 °C | 20.57 mm |
| December | 7.7 °C | 20.1 °C | 69.6 mm |
| Annual | 12.7 °C | 25.5 °C | 430.29 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 1.7°C to 4.4°C |
| Plant Hardiness Zone - 2012 | Zone 10a : -1.1°C to 1.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |