Hi Pat,
No winter woolies wont be in order, however you may want to bring a cardigan or two!
Average temperatures will be....
Tampa 21/22 degrees
St Augustine can range between 15/20 degrees
Jacksonville 18/20 degrees
January sees the lowest rainfall in Florida, so you will be able to escape the English wet weather! It will be pleasant and sunny but not too hot and humid like it is in the summer months.
I would advise to pack light clothing but nothing too summery. So t-shirts, cardigans and light trousers will be fine.
I hope this advise helps. If you would like any other information, please let me know and I will be happy to help.
Warm wishes,
Cheryl, your editor