Trinity Center, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 41.1 °F (low) to 68.7 °F (high). Annual precipitation averages 49.8 Inches. Trinity Center is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.2 °F | 46.5 °F | 8.87 in. |
| February | 31.8 °F | 52.2 °F | 6.7 in. |
| March | 34.3 °F | 58.1 °F | 7.37 in. |
| April | 37.2 °F | 64.9 °F | 4.34 in. |
| May | 43.6 °F | 74.3 °F | 2.42 in. |
| June | 49.5 °F | 83.6 °F | 1.2 in. |
| July | 55.7 °F | 93.2 °F | 0.69 in. |
| August | 54.2 °F | 92.8 °F | 0.26 in. |
| September | 48.4 °F | 86.4 °F | 0.67 in. |
| October | 40.6 °F | 72.1 °F | 2.43 in. |
| November | 35.2 °F | 54.7 °F | 5.13 in. |
| December | 31.3 °F | 45.2 °F | 9.72 in. |
| Annual | 41.1 °F | 68.7 °F | 49.8 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |