Almanor, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 33.7 °F (low) to 62.6 °F (high). Annual precipitation averages 36 Inches. Almanor is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.7 °F | 43.6 °F | 5.56 in. |
| February | 23.7 °F | 46.8 °F | 5.93 in. |
| March | 27.2 °F | 51.7 °F | 5.11 in. |
| April | 30.5 °F | 57.1 °F | 2.87 in. |
| May | 36.9 °F | 66.8 °F | 1.82 in. |
| June | 43.0 °F | 76.8 °F | 0.77 in. |
| July | 48.1 °F | 85.6 °F | 0.42 in. |
| August | 46.9 °F | 84.8 °F | 0.38 in. |
| September | 41.3 °F | 78.6 °F | 0.47 in. |
| October | 33.6 °F | 65.6 °F | 1.83 in. |
| November | 27.6 °F | 51.0 °F | 3.99 in. |
| December | 22.8 °F | 42.5 °F | 6.89 in. |
| Annual | 33.7 °F | 62.6 °F | 36.04 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |