THIRUVANANTHAPURAM: Weather experts say that there is a possibility of light summer rain in the southern districts of Kerala in the coming days. This will get a little stronger in some places. The hilly areas of Thiruvananthapuram and Kottayam districts received rain yesterday. Meanwhile, the temperature may rise up to 38 degrees Celsius in Palakkad district today. The temperature will rise up to 37 degrees in Pathanamthitta, Alappuzha and Thrissur districts and 36 degrees in Kollam, Kottayam, Kozhikode and Kannur districts.