Campbell, CA Weather & Growing Conditions
Tonight
55°F
Mostly Clear then Patchy Fog
Patchy fog after 4am. Mostly clear, with a low around 55. Northwest wind 1 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Mostly Clear then Patchy Fog | 1 to 8 mph NW | 0% |
| Saturday | 86°F | Patchy Fog then Mostly Sunny | 0 to 9 mph NE | 0% |
| Saturday Night | 56°F | Mostly Cloudy | 1 to 7 mph NW | 0% |
| Sunday | 80°F | Partly Sunny | 1 to 7 mph WNW | 2% |
| Sunday Night | 56°F | Mostly Cloudy then Patchy Fog | 1 to 7 mph WNW | 2% |
| Monday | 82°F | Patchy Fog then Mostly Sunny | 1 to 6 mph WSW | 0% |
| Monday Night | 56°F | Mostly Clear | 1 to 6 mph WSW | 0% |
| Tuesday | 86°F | Sunny | 1 to 7 mph W | 0% |
| Tuesday Night | 58°F | Mostly Clear | 0 to 7 mph WNW | 0% |
| Wednesday | 94°F | Sunny | 0 to 7 mph NNW | 0% |
| Wednesday Night | 63°F | Mostly Clear | 0 to 7 mph NNW | 0% |
| Thursday | 94°F | Sunny | 0 to 7 mph NW | 0% |
| Thursday Night | 62°F | Mostly Clear | 0 to 7 mph WNW | 0% |
| Friday | 88°F | Sunny | 0 to 9 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Campbell, CA
Last spring frost
Feb 2
First fall frost
Dec 6
Growing season
310 days
Hardiness zone
9b
Explore more for Campbell, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Los Gatos, Ca (3.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.