"Petaluma is a small town in Sonoma County, California,Petaluma enjoys a mild Mediterranean
climate. The dry summer is characterized by typically warm days and
cool nights. Summer mornings often start out foggy and chilly, but the
fog usually clears by midday or so, giving way to clear skies and warmth
for the remainder of the day. Petaluma is situated at the northernmost navigable end of the Petaluma River, a tidal estuary that snakes southward to San Pablo Bay.
Pollution levels in the river, once considerable, have improved in
recent years. A significant amount of the city is in the river's flood
plain, which overflows its banks every few years, particularly in the