Catalina and Rincon Mountains- Including Mount Lemmon and Summerhaven 116 AM MST Thu Apr 18 2024 .TODAY...Mostly sunny in the morning then becoming partly cloudy. Highs 70 to 78. .TONIGHT...Mostly cloudy. Lows 52 to 58. .FRIDAY...Mostly sunny. Highs 71 to 79. .FRIDAY NIGHT...Clear. Lows 47 to 53. .SATURDAY...Sunny. Highs 67 to 75. .SATURDAY NIGHT...Mostly clear. Lows 50 to 56. .SUNDAY...Mostly sunny. Highs 71 to 79. .SUNDAY NIGHT...Mostly clear. Lows 51 to 57. .MONDAY THROUGH WEDNESDAY...Clear. Highs 67 to 80. Lows 47 to 56. $$