Upper Snake River Plain- Including the cities of Idaho Falls and Rexburg 309 AM MDT Tue Jul 10 2018 .TODAY...Mostly sunny. Breezy. Highs 85 to 93. Southeast winds 10 to 15 mph...shifting to southwest 15 to 25 mph in the afternoon. .TONIGHT...Mostly clear. Breezy, cooler. Lows 51 to 61. Southwest winds 15 to 25 mph...decreasing to 10 to 15 mph after midnight. .WEDNESDAY...Sunny. Highs 83 to 91. West winds around 10 mph... shifting to southwest in the afternoon. .WEDNESDAY NIGHT...Clear. Lows 50 to 58. Southwest winds 10 to 15 mph. .THURSDAY...Sunny. Highs 84 to 92. West winds 10 to 15 mph. .THURSDAY NIGHT AND FRIDAY...Clear. Lows 51 to 58. Highs 85 to 95. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 54 to 61. Highs 85 to 95. .SATURDAY NIGHT...Partly cloudy. Lows 53 to 61. .SUNDAY THROUGH MONDAY...Mostly clear. Highs 80 to 89. Lows 51 to 61. $$