Trinidad, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 46.1 °F (low) to 58.8 °F (high). Annual precipitation averages 52 Inches. Trinidad 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 Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 42.1 °F | 55.1 °F | 9.2 in. |
| February | 41.9 °F | 55.8 °F | 7.54 in. |
| March | 42.4 °F | 56.1 °F | 7.21 in. |
| April | 43.9 °F | 56.4 °F | 4.41 in. |
| May | 46.8 °F | 58.4 °F | 2.57 in. |
| June | 49.2 °F | 60.7 °F | 0.81 in. |
| July | 51.9 °F | 61.9 °F | 0.39 in. |
| August | 52.3 °F | 62.9 °F | 0.21 in. |
| September | 49.9 °F | 63.2 °F | 0.98 in. |
| October | 46.9 °F | 61.6 °F | 3.11 in. |
| November | 44.0 °F | 58.2 °F | 6.11 in. |
| December | 41.4 °F | 54.7 °F | 9.5 in. |
| Annual | 46.1 °F | 58.8 °F | 52.04 in. |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |