It hardly ever freezes in San Geronimo
San Geronimo has warm winters and pleasant summers. A typical July afternoon reaches 76°, a January night drops to 42°, and snow is almost unheard of.
Getting the latest forecast from the National Weather Service…
What stands out about San Geronimo’s weather
Read from 30 years of NOAA records. Each one opens the full story on the Climate page.
Where today sits in San Geronimo’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 San Geronimo.
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 San Geronimo itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Muir Woods, CA (9 mi, snow) and San Rafael Civic Ctr, CA (7 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.