I just bought a book, Astronomy, Weather, and Calendars in the Ancient World, partly because of the introductory chapter. There, a method for "borrowing days" to predict the weather was mentioned:
The weather on the day before the winter solstice forecasts the weather for the first month of winter, the weather on the day of the winter solstice itself forecasts the weather for the second month of winter, and the day after the winter solstice forecasts the weather for the third month of winter. This method applies to the summer solstice and equinoxes, too.
Today we have gorgeous sunshine here in Bergen, and I'm hoping that'll keep be the case all weekend, too. Winter solstice (0 degrees of Capricorn for you astrologers) is on Dec. 22 where I live.