As a coastal region, Thailand has been affected by climate change
significantly in terms of temperature and rainfall distribution change. In this study, a downscaling study was
carried out to identify some climate-related planning parameters for the representative cities in Thailand using the
regional climate model. Results indicated that in the study area around the Hat Yai the near future atmosphere
temperature will increase about 1 o
C to 1.5 o
C compared to the present condition. The minimum annual
temperature will increase about 0.8 degree from 23 o
C to 23.8 oC. It is ranging between 20.8 °C- 25 °C. The
maximum annual temperature in Hat Yai will increase about 1 degree from 32.6 o
C to 33.6 o
C. The mean annual
temperature will increase about 1 degree from 27.8 o
C to 28.8 o
C. The temperature will increase largely in summer
and rainy season in the future. The near future rainfall is projected to increase in most of seasons, especially during
the rainy season which will bring more risk for flood disaster. Furthermore, rainfall pattern and distribution will be
also changed in the near future in Songkhla, with more rain to be expected in rainy season.