Blythe, California has a Hot Desert Climate climate (Köppen classification: BWh). Average annual temperatures range from 57.1 °F (low) to 86.8 °F (high). Annual precipitation averages 3.9 Inches. Blythe is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 40.2 °F | 67.6 °F | 0.65 in. |
| February | 43.3 °F | 71.6 °F | 0.64 in. |
| March | 48.4 °F | 78.6 °F | 0.47 in. |
| April | 54.0 °F | 85.1 °F | 0.12 in. |
| May | 61.6 °F | 93.1 °F | 0.05 in. |
| June | 68.8 °F | 102.1 °F | 0.0 in. |
| July | 77.3 °F | 106.0 °F | 0.18 in. |
| August | 77.6 °F | 105.3 °F | 0.47 in. |
| September | 70.6 °F | 100.4 °F | 0.4 in. |
| October | 57.7 °F | 89.3 °F | 0.21 in. |
| November | 46.5 °F | 76.2 °F | 0.18 in. |
| December | 39.1 °F | 66.2 °F | 0.51 in. |
| Annual | 57.1 °F | 86.8 °F | 3.88 in. |
| Average First Frost Date | Jan. 21 - Jan. 31 |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BWh - Hot Desert Climate |