The Bangkok Metropolitan Adminstration's Department of Drainage and Sewerage said that the average rainfall in Bangkok overnight was at 40-50 millimetres while Watthana was recorded at 65.5 millimetres of rain, the highest in the capital.
However, there was no report of drainage problem, but the rain has slowed traffic.
The Meteorological Department has advised that the lower central, upper southern, eastern regions and Bangkok to brace for heavy rain until Saturday.
In Ang Thong, the water level in Chao Phraya River was stable, only some areas that the water was higher, particularly in the two subdistricts of the provincial seat - Champa Lo and Ban Hae, which were flooded for two weeks.
Residents were stressed as their belongings were flood damaged and they faced transportation difficulties.
In the northern province of Chiang Mai, cold breezes and heavy fog covered the landscape.
Residents and students donned jackets for the first time this season. Visibility on roads from the outer districts to the provincial seat was at 200 metres.
The weather bureau said that a cold spell from China has covered the northern province and the temperature was measured at 22 degrees Celsius.