The average temperature in Idaho Falls, ID the average temperature is 32.5 degrees in summer, with precipitation around 2.3 mm , Syracuse, NY's temperatures reach 30.84 during the hot season, with 12.0 average of rain rate . In winter, however, weather indicators show around -17.44 degrees in Syracuse, NY, compared to the -22.06 average degrees reported in Idaho Falls, ID. During the winter period, Idaho Falls, ID can register 1.6 mm precipitation, while Syracuse, NY have an average of 3.0 mm rain level.