Boulevard, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 43.8 °F (low) to 73 °F (high). Annual precipitation averages 13 Inches. Boulevard is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.6 °F | 59.7 °F | 2.82 in. |
| February | 35.0 °F | 59.0 °F | 2.59 in. |
| March | 36.5 °F | 63.9 °F | 1.97 in. |
| April | 38.1 °F | 66.5 °F | 0.81 in. |
| May | 42.4 °F | 73.5 °F | 0.48 in. |
| June | 48.5 °F | 83.5 °F | 0.04 in. |
| July | 57.1 °F | 91.0 °F | 0.23 in. |
| August | 58.0 °F | 92.1 °F | 0.37 in. |
| September | 53.3 °F | 86.0 °F | 0.35 in. |
| October | 45.7 °F | 75.8 °F | 0.55 in. |
| November | 39.7 °F | 66.6 °F | 0.77 in. |
| December | 35.1 °F | 58.5 °F | 1.97 in. |
| Annual | 43.8 °F | 73 °F | 12.95 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |