The average temperature is 28 degrees Celsius, with extremes of the lower 30's for Bangkok and upper teens for mountainous regions.
Coastal regions are also a bit cooler and often have a steady sea breeze.
Sweaters are needed during the cool season evenings or if visiting mountainous areas or national parks. Jackets and ties are required in a few restaurants and nightclubs. Neat clothes are required for entering temples or palaces. Most offices open from 9 am to 5 pm, Monday to Friday, except on public holidays. General banking hours are Monday to Friday 9.30 am to 3.30 pm.