Wed Feb 26 03:29:23 AM EST 2025 Arco/Mud Lake Desert-Upper Snake River Plain- Including Mud Lake, INL, Craters of the Moon NM, Idaho Falls, Rexburg, and St. Anthony 129 AM MST Wed Feb 26 2025 .TODAY...Mostly sunny. Highs 32 to 39. Southwest winds up to 10 mph...shifting to south in the afternoon. .TONIGHT...Partly cloudy. Lows 13 to 21. Northeast winds up to 10 mph. .THURSDAY...Sunny. Highs 35 to 42. Northeast winds up to 10 mph. .THURSDAY NIGHT...Mostly clear. Lows 12 to 22. Northeast winds up to 10 mph. .FRIDAY...Sunny. Highs 38 to 45. Northeast winds up to 10 mph. .FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 15 to 23. Highs 41 to 48. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows 18 to 27. Highs 41 to 48. .SUNDAY NIGHT...Mostly cloudy. Lows 23 to 32. .MONDAY...Mostly cloudy with a chance of snow and rain. Highs 37 to 44. .MONDAY NIGHT AND TUESDAY...Mostly cloudy with a chance of snow. Lows 23 to 31. Highs 35 to 42.