Redway, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.6 °C (low) to 21.1 °C (high). Annual precipitation averages 1477.8 Millimeters. Redway is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.6 °C | 12.3 °C | 283.72 mm |
| February | 3.7 °C | 13.9 °C | 232.41 mm |
| March | 4.3 °C | 15.9 °C | 217.42 mm |
| April | 5.2 °C | 18.9 °C | 115.32 mm |
| May | 7.4 °C | 22.4 °C | 51.31 mm |
| June | 9.3 °C | 25.8 °C | 17.02 mm |
| July | 11.2 °C | 31.2 °C | 2.03 mm |
| August | 11 °C | 31.4 °C | 2.03 mm |
| September | 8.9 °C | 29.8 °C | 11.43 mm |
| October | 6.7 °C | 24.3 °C | 77.98 mm |
| November | 5 °C | 15.3 °C | 163.32 mm |
| December | 3.2 °C | 11.4 °C | 303.78 mm |
| Annual | 6.6 °C | 21.1 °C | 1477.77 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |