Campbell, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Campbell, a city in Santa Clara County, California.
This Afternoon
68°F
Sunny
Sunny. High near 68, with temperatures falling to around 65 in the afternoon. North northwest wind 7 to 10 mph, with gusts as high as 18 mph.
7-day forecast for Campbell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Sunny | 7 to 10 mph NNW | 1% |
| Tonight | 48°F | Mostly Cloudy then Patchy Fog | 2 to 8 mph W | 1% |
| Thursday | 72°F | Patchy Fog then Sunny | 1 to 7 mph NW | 0% |
| Thursday Night | 48°F | Mostly Clear | 1 to 5 mph NNE | 0% |
| Friday | 74°F | Sunny | 1 to 6 mph N | 0% |
| Friday Night | 50°F | Mostly Clear | 1 to 6 mph NNE | 0% |
| Saturday | 79°F | Sunny | 0 to 3 mph N | 0% |
| Saturday Night | 49°F | Mostly Clear | 0 to 3 mph N | 0% |
| Sunday | 77°F | Sunny | 0 to 5 mph NNW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Monday | 75°F | Mostly Sunny | 0 to 7 mph NNW | 0% |
| Monday Night | 50°F | Partly Cloudy | 0 to 7 mph NNW | 0% |
| Tuesday | 75°F | Sunny | 0 to 5 mph N | 1% |
| Tuesday Night | 51°F | Mostly Clear | 5 mph ENE | 7% |
Forecast source: National Weather Service (api.weather.gov) for Campbell (37.280, -121.953). Updated through the day.
Growing snapshot for Campbell
Last spring frost
Feb 2
First fall frost
Dec 6
Growing season
310 days
Hardiness zone
9b
More local growing data for Campbell: nearby ZIP 95008 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Los Gatos, Ca (3.3 mi from Campbell). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.