| 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 Zone 10a: 30°F to 35°F |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F |
| Average First Frost Date: | Jan. 11 - Jan. 20 |
| Average Last Frost Date: | Jan. 21 - Jan. 31 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 94040 - Mountain View, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 39 | 42 | 44 | 46 | 49 | 53 | 55 | 55 | 54 | 49 | 43 | 39 | 47 |
| Avg Max Temp (°F) | 59 | 63 | 66 | 71 | 75 | 80 | 83 | 83 | 81 | 75 | 65 | 59 | 71 |
| Avg Precip (In.) | 3.93 | 3.89 | 3.25 | 1.08 | .42 | .12 | .04 | .08 | .23 | .99 | 2.34 | 2.77 | 19.13 |