Have the same problem in the basement of same type of house, only slightly to the north.
What didn't work:
1. Opening windows. Only half of the window could be open, sliding windows. Casement windows, opening inside and allowing to use all the window opening, are not available - either prohibited, or just not manufactured.
Half of window open doesn't help, even if windows on the opposite sides of the house are open. In addition, the front window has to be closed for the night, for the security reasons. In winter, needless to say, all windows has to be closed.
2. Dehumidifier. Pulls water from the air very well, but is noisy and heats the room to the unacceptable temperature in the summer. Maybe combination dehumidifier + chiller will work, But I had seen $600 or something room air conditioners with dehumidifier, this is cheaper, but too late for me.
Sorry, not much help, I'm in the same situation.