The average temperature in Prescott the average temperature is 37.25 degrees in summer, with precipitation around 9.0 mm , Eugene, OR's temperatures reach 34.99 during the hot season, with 9.0 average of rain rate . In winter, however, weather indicators show around -4.8 degrees in Eugene, OR, compared to the -9.91 average degrees reported in Prescott. During the winter period, Prescott can register 3.0 mm precipitation, while Eugene, OR have an average of 6.0 mm rain level.