Santa Maria, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 47.7 °F (low) to 68.7 °F (high). Annual precipitation averages 14.3 Inches. Santa Maria is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 42.2 °F | 64.1 °F | 3.13 in. |
| February | 43.1 °F | 64.2 °F | 3.22 in. |
| March | 44.6 °F | 65.4 °F | 2.67 in. |
| April | 45.3 °F | 66.8 °F | 0.94 in. |
| May | 48.3 °F | 68.2 °F | 0.3 in. |
| June | 50.9 °F | 70.2 °F | 0.05 in. |
| July | 54.2 °F | 72.2 °F | 0.06 in. |
| August | 54.4 °F | 72.9 °F | 0.01 in. |
| September | 53.1 °F | 74.0 °F | 0.08 in. |
| October | 49.9 °F | 73.8 °F | 0.61 in. |
| November | 45.1 °F | 69.0 °F | 1.16 in. |
| December | 40.9 °F | 63.6 °F | 2.03 in. |
| Annual | 47.7 °F | 68.7 °F | 14.26 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |