Portola Valley is warming faster than most towns
Portola Valley has warm winters and pleasant summers. A typical July afternoon reaches 80°, a January night drops to 41°. A typical November afternoon reaches 63°, and nights fall to 44°.
Getting the latest forecast from the National Weather Service…
What stands out about Portola Valley’s weather
Read from 30 years of NOAA records. Each one opens the full story on the Climate page.
Where today sits in Portola Valley’s year
Typical highs and lows month by month, from 30 years of NOAA records.
Weather talk
Road reports, first frosts and storm memories from neighbors in Portola Valley.
Your answer becomes a post in Town Square.
Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Portola Valley itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Skyline Ridge Preserve, CA (4 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.