| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 10a: 30F to 35F | |
| Average First Frost Date: | Jan. 1 - Jan. 10 | |
| Average Last Frost Date: | Feb. 1 - Feb. 10 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 93407 - San Luis Obispo, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 41 | 42 | 43 | 44 | 47 | 50 | 52 | 53 | 52 | 49 | 44 | 40 | 46 |
| Avg Max Temp (°F) | 64 | 66 | 66 | 71 | 73 | 78 | 81 | 82 | 81 | 78 | 71 | 66 | 73 |
| Avg Precip (In.) | 5.08 | 5.12 | 4.2 | 1.32 | .47 | .07 | .03 | .07 | .42 | .81 | 2.03 | 3.48 | 23.11 |