Rio Linda, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 48.9 °F (low) to 74.4 °F (high). Annual precipitation averages 21.4 Inches. Rio Linda is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.1 °F | 55.3 °F | 3.97 in. |
| February | 41.3 °F | 60.5 °F | 3.85 in. |
| March | 44.2 °F | 65.7 °F | 3.11 in. |
| April | 46.7 °F | 71.7 °F | 1.66 in. |
| May | 52.1 °F | 80.0 °F | 1.14 in. |
| June | 56.9 °F | 87.7 °F | 0.21 in. |
| July | 59.7 °F | 93.1 °F | 0.01 in. |
| August | 59.0 °F | 92.1 °F | 0.03 in. |
| September | 56.4 °F | 88.5 °F | 0.12 in. |
| October | 50.1 °F | 78.4 °F | 1.14 in. |
| November | 42.6 °F | 64.6 °F | 2.03 in. |
| December | 38.6 °F | 55.7 °F | 4.08 in. |
| Annual | 48.9 °F | 74.4 °F | 21.35 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |