Bay Point, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 49.6 °F (low) to 72.1 °F (high). Annual precipitation averages 18.1 Inches. Bay Point is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 40.0 °F | 56.0 °F | 3.68 in. |
| February | 42.4 °F | 60.6 °F | 3.62 in. |
| March | 45.4 °F | 65.3 °F | 2.49 in. |
| April | 48.1 °F | 69.7 °F | 1.37 in. |
| May | 52.3 °F | 75.9 °F | 0.58 in. |
| June | 56.1 °F | 82.5 °F | 0.14 in. |
| July | 58.2 °F | 86.8 °F | 0.01 in. |
| August | 58.1 °F | 86.8 °F | 0.02 in. |
| September | 56.9 °F | 84.1 °F | 0.06 in. |
| October | 52.3 °F | 76.6 °F | 0.84 in. |
| November | 44.7 °F | 64.7 °F | 1.75 in. |
| December | 40.1 °F | 56.3 °F | 3.58 in. |
| Annual | 49.6 °F | 72.1 °F | 18.14 in. |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| 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 |