East Quincy, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 2.1 °C (low) to 19.8 °C (high). Annual precipitation averages 991.4 Millimeters. East Quincy is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.2 °C | 8.6 °C | 160.53 mm |
| February | -2.8 °C | 11.3 °C | 166.88 mm |
| March | -1 °C | 14 °C | 150.37 mm |
| April | 0.4 °C | 17.5 °C | 80.26 mm |
| May | 3.8 °C | 22.3 °C | 49.53 mm |
| June | 7 °C | 27.8 °C | 18.54 mm |
| July | 9.9 °C | 32.7 °C | 3.05 mm |
| August | 8.7 °C | 32.3 °C | 4.06 mm |
| September | 5.3 °C | 28.9 °C | 11.94 mm |
| October | 1.3 °C | 21.8 °C | 48.77 mm |
| November | -1.4 °C | 13.1 °C | 100.84 mm |
| December | -3.3 °C | 7.6 °C | 196.6 mm |
| Annual | 2.1 °C | 19.8 °C | 991.37 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |