The average temperature in San Diego the average temperature is 32.1 degrees in summer, with precipitation around 6.0 mm , Cedar City's temperatures reach 35.21 during the hot season, with 2.3 average of rain rate . In winter, however, weather indicators show around -18.72 degrees in Cedar City, compared to the 1.16 average degrees reported in San Diego. During the winter period, San Diego can register 9.0 mm precipitation, while Cedar City have an average of 0.9 mm rain level.