Guadalupe, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 9.2 °C (low) to 19 °C (high). Annual precipitation averages 371.4 Millimeters. Guadalupe is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.2 °C | 17.7 °C | 75.44 mm |
| February | 6.8 °C | 17.7 °C | 84.84 mm |
| March | 7.6 °C | 18.2 °C | 69.34 mm |
| April | 7.9 °C | 18 °C | 21.34 mm |
| May | 9.5 °C | 18.2 °C | 8.89 mm |
| June | 10.9 °C | 19 °C | 1.52 mm |
| July | 12.7 °C | 19.4 °C | 1.27 mm |
| August | 12.7 °C | 20.1 °C | 0.51 mm |
| September | 11.9 °C | 20.9 °C | 1.78 mm |
| October | 10.2 °C | 21.2 °C | 17.53 mm |
| November | 7.9 °C | 20.1 °C | 31.75 mm |
| December | 5.6 °C | 17.4 °C | 57.15 mm |
| Annual | 9.2 °C | 19 °C | 371.36 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°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 |