Shortly after reading about New York City's coldest August day, I was riding on the Avenues near San Francisco's Great Highway where I noticed people wearing heavy sweaters and parkas to keep warm. The weather made a reader's question about overcoats seem timely; he asked what might fall between the formality of a city coat, such as a polo or a covert, and an informal coat, like a Barbour or a shearling jacket. To me, that would be a country coat for wear over a jacket.
Gray or blue cloth makes for an in-between version that can be worn on informal occasions in the city.
Much as I like tweed, I'm not really ready for cold weather. Fortunately, in the Bay area, summer doesn't really begin until after Labor Day.