Santa waves to a passing tot during Christmas in New Harmony events. Above, cold temperatures caused the water on the wheel in front of the Red Wagon restaurant in Poseyville to ice over. Temperatures are not expected to rise above freezing in Posey County until Wednesday, when the high is expected to be 33 degrees, and a low of eight degrees is predicted. Thusday. Friday and Saturday, temperatures will warm to a high of 38 on Saturday, and rain is possible.