Greeley Hill, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 6.5 °C (low) to 21.2 °C (high). Annual precipitation averages 930.9 Millimeters. Greeley Hill is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.6 °C | 12.3 °C | 181.86 mm |
| February | 1 °C | 13.1 °C | 166.62 mm |
| March | 2.3 °C | 15.4 °C | 136.4 mm |
| April | 3.7 °C | 17.8 °C | 77.47 mm |
| May | 7.4 °C | 22.4 °C | 39.12 mm |
| June | 11.2 °C | 28.1 °C | 14.48 mm |
| July | 15.3 °C | 32.5 °C | 3.05 mm |
| August | 14.6 °C | 32.3 °C | 2.29 mm |
| September | 12.1 °C | 29.3 °C | 4.32 mm |
| October | 7.2 °C | 23.2 °C | 51.05 mm |
| November | 2.9 °C | 16.2 °C | 93.73 mm |
| December | 0.2 °C | 11.7 °C | 160.53 mm |
| Annual | 6.5 °C | 21.2 °C | 930.92 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |