Novato, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7.9 °C (low) to 21.4 °C (high). Annual precipitation averages 843.3 Millimeters. Novato is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.3 °C | 13.4 °C | 172.21 mm |
| February | 5.2 °C | 15.7 °C | 179.83 mm |
| March | 5.9 °C | 17.6 °C | 105.66 mm |
| April | 6.9 °C | 19.6 °C | 44.45 mm |
| May | 8.8 °C | 23.2 °C | 25.15 mm |
| June | 10.6 °C | 26.8 °C | 4.06 mm |
| July | 11.6 °C | 28.2 °C | 0 mm |
| August | 11.8 °C | 28.6 °C | 1.02 mm |
| September | 10.9 °C | 27.6 °C | 1.27 mm |
| October | 8.8 °C | 24.3 °C | 42.67 mm |
| November | 5.9 °C | 17.9 °C | 76.96 mm |
| December | 4.1 °C | 13.6 °C | 189.99 mm |
| Annual | 7.9 °C | 21.4 °C | 843.27 mm |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |