| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F | |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F | |
| Average First Frost Date: | December 11 - 20 | |
| Average Last Frost Date: | February 1 - 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 94087 - Sunnyvale, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 40 | 42 | 44 | 45 | 49 | 53 | 55 | 56 | 54 | 50 | 44 | 39 | 48 |
| Avg Max Temp (°F) | 59 | 63 | 66 | 71 | 76 | 81 | 84 | 84 | 82 | 76 | 65 | 59 | 72 |
| Avg Precip (In.) | 4.13 | 3.96 | 3.4 | 1.12 | .42 | .13 | .05 | .08 | .26 | 1.01 | 2.35 | 2.68 | 19.58 |