El Portal, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 47.6 °F (low) to 72.7 °F (high). Annual precipitation averages 34.7 Inches. El Portal is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.8 °F | 54.8 °F | 7.01 in. |
| February | 37.2 °F | 57.6 °F | 6.21 in. |
| March | 40.1 °F | 62.6 °F | 5.37 in. |
| April | 43.5 °F | 66.9 °F | 2.86 in. |
| May | 49.7 °F | 76.1 °F | 1.65 in. |
| June | 56.7 °F | 86.0 °F | 0.5 in. |
| July | 63.1 °F | 93.9 °F | 0.09 in. |
| August | 62.3 °F | 93.8 °F | 0.13 in. |
| September | 57.3 °F | 87.7 °F | 0.28 in. |
| October | 49.4 °F | 76.3 °F | 1.68 in. |
| November | 40.8 °F | 63.5 °F | 3.0 in. |
| December | 35.1 °F | 53.7 °F | 5.9 in. |
| Annual | 47.6 °F | 72.7 °F | 34.68 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°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 |