Weed, California has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 36.9 °F (low) to 64.2 °F (high). Annual precipitation averages 28.1 Inches. Weed is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.9 °F | 45.2 °F | 4.06 in. |
| February | 28.3 °F | 48.8 °F | 4.26 in. |
| March | 30.7 °F | 53.6 °F | 3.84 in. |
| April | 33.8 °F | 59.5 °F | 2.83 in. |
| May | 39.8 °F | 69.0 °F | 1.95 in. |
| June | 45.6 °F | 77.8 °F | 0.89 in. |
| July | 51.0 °F | 87.7 °F | 0.63 in. |
| August | 49.4 °F | 86.8 °F | 0.27 in. |
| September | 43.5 °F | 80.1 °F | 0.32 in. |
| October | 36.4 °F | 66.5 °F | 1.45 in. |
| November | 30.6 °F | 52.2 °F | 3.27 in. |
| December | 26.4 °F | 43.7 °F | 4.29 in. |
| Annual | 36.9 °F | 64.2 °F | 28.06 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |