Belden, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 4.7 °C (low) to 21.1 °C (high). Annual precipitation averages 1301.5 Millimeters. Belden is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.4 °C | 10.3 °C | 234.95 mm |
| February | 0.1 °C | 12.6 °C | 201.17 mm |
| March | 1.7 °C | 15.4 °C | 202.69 mm |
| April | 3.1 °C | 18.6 °C | 105.92 mm |
| May | 6.3 °C | 23.6 °C | 67.82 mm |
| June | 9.2 °C | 29.1 °C | 22.86 mm |
| July | 11.8 °C | 33.6 °C | 2.54 mm |
| August | 11 °C | 33.2 °C | 3.81 mm |
| September | 8.2 °C | 29.9 °C | 8.89 mm |
| October | 3.9 °C | 22.4 °C | 60.96 mm |
| November | 1.6 °C | 14.6 °C | 126.49 mm |
| December | -0.7 °C | 9.5 °C | 263.4 mm |
| Annual | 4.7 °C | 21.1 °C | 1301.5 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |