The average temperature in Eau Claire, WI the average temperature is 31.55 degrees in summer, with precipitation around 9.0 mm , Birmingham's temperatures reach 34.81 during the hot season, with 12.0 average of rain rate . In winter, however, weather indicators show around -5.79 degrees in Birmingham, compared to the -25.83 average degrees reported in Eau Claire, WI. During the winter period, Eau Claire, WI can register 1.6 mm precipitation, while Birmingham have an average of 12.0 mm rain level.