Diamond Springs, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 47.3 °F (low) to 71.1 °F (high). Annual precipitation averages 38.6 Inches. Diamond Springs is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.9 °F | 54.4 °F | 7.07 in. |
| February | 38.6 °F | 57.2 °F | 6.75 in. |
| March | 40.7 °F | 61.2 °F | 5.7 in. |
| April | 43.0 °F | 65.2 °F | 3.41 in. |
| May | 48.7 °F | 73.8 °F | 2.01 in. |
| June | 54.8 °F | 83.5 °F | 0.52 in. |
| July | 60.5 °F | 91.1 °F | 0.01 in. |
| August | 60.4 °F | 90.7 °F | 0.07 in. |
| September | 56.5 °F | 85.6 °F | 0.33 in. |
| October | 49.5 °F | 75.2 °F | 1.89 in. |
| November | 41.3 °F | 62.0 °F | 3.82 in. |
| December | 36.7 °F | 53.8 °F | 7.0 in. |
| Annual | 47.3 °F | 71.1 °F | 38.58 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |