Beaumont, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 9.5 °C (low) to 25.4 °C (high). Annual precipitation averages 446.3 Millimeters. Beaumont is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.1 °C | 17.3 °C | 89.92 mm |
| February | 4.5 °C | 17.6 °C | 111 mm |
| March | 5.4 °C | 19.8 °C | 72.14 mm |
| April | 6.8 °C | 22.6 °C | 27.94 mm |
| May | 9.2 °C | 26.1 °C | 16 mm |
| June | 12.2 °C | 31.1 °C | 3.3 mm |
| July | 16.3 °C | 35.2 °C | 6.6 mm |
| August | 16.6 °C | 35.4 °C | 3.3 mm |
| September | 14.8 °C | 32.9 °C | 6.86 mm |
| October | 11.1 °C | 27.3 °C | 21.08 mm |
| November | 7.1 °C | 21.8 °C | 27.94 mm |
| December | 4.7 °C | 17.1 °C | 60.2 mm |
| Annual | 9.5 °C | 25.4 °C | 446.28 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |