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February 12, 2025


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San Geronimo is a small unincorporated community located in Marin County, California. It enjoys a Mediterranean climate, characterized by mild, wet winters and warm, dry summers. Summers are typically fog-free and temperatures range from the mid-70s to mid-80s Fahrenheit, while winters see average temperatures in the mid-50s. Rainfall occurs mostly between November and April, with an annual average of around 40 inches.

The main hydrology constituent in San Geronimo is the San Geronimo Creek, which runs through the community. This creek supports a diverse ecosystem, providing habitat for various aquatic and terrestrial species. The creek is also popular for recreational activities such as fishing, swimming, and kayaking.

San Geronimo offers a range of outdoor recreation opportunities. The nearby Samuel P. Taylor State Park provides hiking and biking trails, picnic areas, and campsites amidst towering redwood trees. Golf enthusiasts can enjoy a round at the nearby San Geronimo Golf Course, known for its scenic beauty. The area is also a gateway to the expansive Point Reyes National Seashore, offering further opportunities for hiking, birdwatching, wildlife spotting, and beachcombing.

       

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Weather Forecast

San-Geronimo receives approximately 1150mm of rain per year, with humidity levels near 77% and air temperatures averaging around 15°C. San-Geronimo has a plant hardyness factor of 9, meaning plants and agriculture in this region tend to thrive here all year round.

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