Floriston, California has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 29.6 °F (low) to 62.2 °F (high). Annual precipitation averages 21.8 Inches. Floriston is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.5 °F | 43.2 °F | 3.76 in. |
| February | 19.4 °F | 46.2 °F | 3.57 in. |
| March | 23.9 °F | 51.0 °F | 3.15 in. |
| April | 27.5 °F | 56.8 °F | 1.55 in. |
| May | 33.8 °F | 65.9 °F | 0.79 in. |
| June | 38.6 °F | 75.6 °F | 0.45 in. |
| July | 44.5 °F | 85.1 °F | 0.23 in. |
| August | 42.6 °F | 84.1 °F | 0.22 in. |
| September | 37.1 °F | 77.3 °F | 0.37 in. |
| October | 29.8 °F | 65.8 °F | 1.67 in. |
| November | 22.7 °F | 52.5 °F | 2.0 in. |
| December | 17.9 °F | 42.4 °F | 4.07 in. |
| Annual | 29.6 °F | 62.2 °F | 21.83 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |