Atherton, CA Weather & Growing Conditions
Overnight
58°F
Partly Cloudy
Partly cloudy, with a low around 58. Southwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Partly Cloudy | 5 mph SW | 0% |
| Saturday | 82°F | Mostly Sunny | 2 to 9 mph N | 0% |
| Saturday Night | 57°F | Partly Cloudy | 3 to 8 mph SW | 0% |
| Sunday | 76°F | Mostly Cloudy | 3 to 7 mph WSW | 3% |
| Sunday Night | 57°F | Mostly Cloudy | 2 to 7 mph W | 3% |
| Monday | 78°F | Mostly Sunny | 2 to 8 mph WSW | 1% |
| Monday Night | 57°F | Partly Cloudy | 2 to 7 mph WSW | 1% |
| Tuesday | 80°F | Sunny | 2 to 7 mph WSW | 0% |
| Tuesday Night | 57°F | Mostly Clear | 1 to 7 mph WSW | 0% |
| Wednesday | 89°F | Sunny | 1 to 7 mph WSW | 0% |
| Wednesday Night | 61°F | Mostly Clear | 0 to 7 mph W | 0% |
| Thursday | 90°F | Sunny | 0 to 8 mph WNW | 0% |
| Thursday Night | 61°F | Mostly Clear | 2 to 8 mph W | 0% |
| Friday | 84°F | Mostly Sunny | 2 to 8 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Atherton, CA
Last spring frost
Jan 17
First fall frost
Dec 12
Growing season
333 days
Hardiness zone
9b
Explore more for Atherton, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Redwood City, Ca (2.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.