The average temperature in Eugene, OR the average temperature is 34.99 degrees in summer, with precipitation around 9.0 mm , Flint, MI's temperatures reach 32.22 during the hot season, with 9.0 average of rain rate . In winter, however, weather indicators show around -18.01 degrees in Flint, MI, compared to the -4.8 average degrees reported in Eugene, OR. During the winter period, Eugene, OR can register 6.0 mm precipitation, while Flint, MI have an average of 3.0 mm rain level.