Atherton, CA Weather & Growing Conditions
Today
90°F
Sunny
Sunny, with a high near 90. North wind 1 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Sunny | 1 to 8 mph N | 0% |
| Tonight | 59°F | Mostly Clear | 1 to 6 mph E | 0% |
| Wednesday | 89°F | Sunny | 1 to 8 mph WNW | 0% |
| Wednesday Night | 60°F | Mostly Clear | 0 to 7 mph W | 0% |
| Thursday | 87°F | Sunny | 0 to 8 mph WNW | 0% |
| Thursday Night | 61°F | Mostly Clear | 1 to 8 mph WNW | 0% |
| Friday | 91°F | Sunny | 1 to 8 mph WNW | 0% |
| Friday Night | 62°F | Mostly Clear | 0 to 8 mph W | 0% |
| Saturday | 91°F | Sunny | 1 to 8 mph WNW | 0% |
| Saturday Night | 62°F | Mostly Clear | 2 to 8 mph W | 0% |
| Sunday | 86°F | Sunny | 2 to 9 mph W | 0% |
| Sunday Night | 60°F | Mostly Clear | 3 to 9 mph WSW | 0% |
| Monday | 83°F | Sunny | 3 to 9 mph WSW | 0% |
| Monday Night | 58°F | Mostly Clear | 3 to 9 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 Aug 4, 2026.