FPUS55 KTWC 201839 ZFPTWC Zone Forecast Product for Southeast Arizona National Weather Service Tucson AZ 1138 AM MST Wed May 20 2026 AZZ501-210200- Western Pima County- Including Ajo and Organ Pipe Cactus N.M. 1138 AM MST Wed May 20 2026 .REST OF TODAY...Mostly sunny. Highs 89 to 94. .TONIGHT...Mostly clear. Lows 59 to 64. .THURSDAY...Sunny. Highs 91 to 96. .THURSDAY NIGHT...Clear. Lows 61 to 66. .FRIDAY...Sunny. Highs 91 to 96. .FRIDAY NIGHT...Clear. Lows 62 to 67. .SATURDAY...Sunny. Highs 92 to 97. .SATURDAY NIGHT...Clear. Lows 63 to 68. .SUNDAY THROUGH TUESDAY...Clear. Highs 91 to 100. Lows 63 to 69. $$ AZZ502-210200- Tohono O'odham Nation- Including Sells 1138 AM MST Wed May 20 2026 .REST OF TODAY...Partly cloudy. Highs 86 to 91. .TONIGHT...Mostly clear. Lows 57 to 63. .THURSDAY...Sunny. Highs 88 to 93. .THURSDAY NIGHT...Clear. Lows 59 to 65. .FRIDAY...Sunny. Highs 89 to 94. .FRIDAY NIGHT...Clear. Lows 60 to 66. .SATURDAY...Sunny. Highs 90 to 95. .SATURDAY NIGHT...Clear. Lows 61 to 67. .SUNDAY AND SUNDAY NIGHT...Clear. Highs 93 to 98. Lows 63 to 69. .MEMORIAL DAY...Mostly sunny. Highs 93 to 98. .MONDAY NIGHT AND TUESDAY...Clear. Lows 61 to 67. Highs 90 to 95. $$ AZZ503-210200- Upper Santa Cruz River Valley/Altar Valley- Including Nogales 1138 AM MST Wed May 20 2026 .REST OF TODAY...Mostly cloudy. Highs 82 to 88. .TONIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows 50 to 56. .THURSDAY...Sunny. Highs 83 to 89. .THURSDAY NIGHT...Clear. Lows 52 to 58. .FRIDAY...Sunny. Highs 83 to 89. .FRIDAY NIGHT...Clear. Lows 52 to 58. .SATURDAY...Sunny. Highs 84 to 90. .SATURDAY NIGHT...Mostly clear. Lows 53 to 59. .SUNDAY...Sunny. Highs 87 to 93. .SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Lows 53 to 61. Highs 87 to 93. .TUESDAY...Sunny. Highs 85 to 91. $$ AZZ504-210200- Tucson Metro Area- Including Tucson, Green Valley, Marana, and Vail 1138 AM MST Wed May 20 2026 .REST OF TODAY...Mostly cloudy. Highs 86 to 92. Southwest wind 10 to 15 mph. .TONIGHT...Partly cloudy. Lows 56 to 62. West wind 10 to 15 mph becoming south after midnight. .THURSDAY...Sunny. Highs 87 to 93. South wind around 5 mph becoming west in the afternoon. .THURSDAY NIGHT...Mostly clear. Lows 58 to 64. West wind 5 to 15 mph becoming south around 10 mph after midnight. .FRIDAY...Sunny. Highs 87 to 93. South wind around 5 mph becoming southwest around 10 mph in the afternoon. .FRIDAY NIGHT...Mostly clear. Lows 59 to 65. .SATURDAY...Sunny. Highs 88 to 94. .SATURDAY NIGHT...Clear. Lows 60 to 66. .SUNDAY...Sunny. Highs 91 to 97. .SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Lows 59 to 68. Highs 91 to 97. .TUESDAY...Sunny. Highs 89 to 95. $$ AZZ505-210200- South Central Pinal County- Including Picacho Peak State Park 1138 AM MST Wed May 20 2026 .REST OF TODAY...Partly cloudy. Highs 87 to 92. .TONIGHT...Mostly clear. Lows 56 to 62. .THURSDAY...Sunny. Highs 88 to 93. .THURSDAY NIGHT...Clear. Lows 59 to 64. .FRIDAY...Sunny. Highs 89 to 94. .FRIDAY NIGHT...Mostly clear. Lows 61 to 66. .SATURDAY...Sunny. Highs 90 to 95. .SATURDAY NIGHT...Clear. Lows 63 to 68. .SUNDAY AND SUNDAY NIGHT...Clear. Highs 93 to 98. Lows 64 to 69. .MEMORIAL DAY AND MONDAY NIGHT...Mostly clear. Highs 93 to 98. Lows 62 to 67. .TUESDAY...Sunny. Highs 91 to 96. $$ AZZ506-210200- Southeast Pinal County- Including Mammoth and Oracle 1138 AM MST Wed May 20 2026 .REST OF TODAY...Partly cloudy. Highs 84 to 90. .TONIGHT...Partly cloudy. Lows 57 to 62. .THURSDAY...Sunny. Highs 85 to 91. .THURSDAY NIGHT...Clear. Lows 58 to 63. .FRIDAY...Sunny. Highs 86 to 92. .FRIDAY NIGHT...Mostly clear. Lows 60 to 65. .SATURDAY...Sunny. Highs 87 to 93. .SATURDAY NIGHT...Clear. Lows 61 to 66. .SUNDAY...Sunny. Highs 90 to 96. .SUNDAY NIGHT...Mostly clear. Lows 63 to 68. .MEMORIAL DAY...Partly cloudy. Highs 90 to 96. .MONDAY NIGHT...Mostly clear. Lows 60 to 65. .TUESDAY...Sunny. Highs 88 to 94. $$ AZZ507-210200- Upper San Pedro River Valley- Including Sierra Vista and Benson 1138 AM MST Wed May 20 2026 .REST OF TODAY...Mostly cloudy. Highs 82 to 87. .TONIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows 50 to 56. .THURSDAY...Mostly sunny. Highs 82 to 87. .THURSDAY NIGHT...Mostly clear. Lows 51 to 57. .FRIDAY...Sunny. Highs 81 to 87. .FRIDAY NIGHT...Mostly clear. Lows 52 to 58. .SATURDAY...Mostly sunny. Highs 82 to 88. .SATURDAY NIGHT...Mostly clear. Lows 54 to 59. .SUNDAY...Sunny. Highs 86 to 92. .SUNDAY NIGHT THROUGH MONDAY NIGHT...Partly cloudy. Lows 52 to 61. Highs 87 to 92. .TUESDAY...Sunny. Highs 83 to 89. $$ AZZ508-210200- Eastern Cochise County below 5000 feet- Including Willcox and Douglas 1138 AM MST Wed May 20 2026 .REST OF TODAY...Partly cloudy. Highs 84 to 89. .TONIGHT...Mostly cloudy. Lows 51 to 57. .THURSDAY...Partly cloudy in the morning then clearing. Highs 83 to 88. .THURSDAY NIGHT...Mostly clear. Lows 51 to 57. .FRIDAY...Sunny. Highs 83 to 88. .FRIDAY NIGHT...Mostly clear. Lows 53 to 59. .SATURDAY...Mostly sunny. Highs 83 to 88. .SATURDAY NIGHT...Mostly clear. Lows 54 to 59. .SUNDAY...Sunny. Highs 87 to 92. .SUNDAY NIGHT...Mostly clear. Lows 56 to 61. .MEMORIAL DAY...Partly cloudy with a 10 percent chance of showers and thunderstorms. Highs 87 to 92. .MONDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 53 to 59. .TUESDAY...Mostly sunny. Highs 85 to 90. $$ AZZ509-210200- Upper Gila River Valley- Including Clifton and Safford 1138 AM MST Wed May 20 2026 .REST OF TODAY...Mostly cloudy. Highs 82 to 90. .TONIGHT...Mostly cloudy. Lows 54 to 60. .THURSDAY...Mostly sunny. Highs 82 to 90. .THURSDAY NIGHT...Mostly clear. Lows 54 to 60. .FRIDAY...Sunny. Highs 83 to 91. .FRIDAY NIGHT...Mostly clear. Lows 55 to 61. .SATURDAY...Mostly sunny. Highs 84 to 92. .SATURDAY NIGHT...Clear. Lows 57 to 63. .SUNDAY...Sunny. Highs 88 to 96. .SUNDAY NIGHT...Mostly clear. Lows 58 to 64. .MEMORIAL DAY...Partly cloudy with a 10 percent chance of showers and thunderstorms. Highs 86 to 94. .MONDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 56 to 62. .TUESDAY...Mostly sunny. Highs 84 to 92. $$ AZZ510-210200- White Mountains of Graham and Greenlee Counties- Including Hannagan Meadow 1138 AM MST Wed May 20 2026 .REST OF TODAY...Mostly cloudy. Highs 70 to 80. .TONIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows 43 to 55. .THURSDAY...Mostly sunny. Highs 70 to 80. .THURSDAY NIGHT...Mostly clear. Lows 44 to 56. .FRIDAY...Sunny. Highs 72 to 82. .FRIDAY NIGHT...Mostly clear. Lows 46 to 58. .SATURDAY...Mostly sunny. Highs 73 to 83. .SATURDAY NIGHT...Mostly clear. Lows 46 to 58. .SUNDAY...Sunny. Highs 77 to 87. .SUNDAY NIGHT...Mostly clear. Lows 49 to 61. .MEMORIAL DAY...Partly cloudy with a 10 percent chance of showers and thunderstorms. Highs 75 to 85. .MONDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 47 to 59. .TUESDAY...Mostly sunny with a 10 percent chance of showers and thunderstorms. Highs 72 to 82. $$ AZZ511-210200- Galiuro and Pinaleno Mountains- Including Mount Graham 1138 AM MST Wed May 20 2026 .REST OF TODAY...Mostly cloudy. Highs 71 to 81. .TONIGHT...Mostly cloudy. Lows 51 to 57. .THURSDAY...Mostly sunny. Highs 71 to 81. .THURSDAY NIGHT...Mostly clear. Lows 51 to 57. .FRIDAY...Sunny. Highs 71 to 81. .FRIDAY NIGHT...Mostly clear. Lows 53 to 59. .SATURDAY...Mostly sunny. Highs 72 to 82. .SATURDAY NIGHT...Clear. Lows 54 to 60. .SUNDAY...Sunny. Highs 77 to 87. .SUNDAY NIGHT...Mostly clear. Lows 56 to 62. .MEMORIAL DAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Highs 76 to 86. Chance of precipitation 30 percent. .MONDAY NIGHT...Mostly clear with a 10 percent chance of showers and thunderstorms. Lows 53 to 59. .TUESDAY...Mostly sunny. Highs 74 to 84. $$ AZZ512-210200- Chiricahua Mountains- Including Chiricahua N.M. 1138 AM MST Wed May 20 2026 .REST OF TODAY...Partly cloudy. Highs 74 to 82. .TONIGHT...Mostly cloudy. Lows 50 to 56. .THURSDAY...Partly cloudy in the morning then clearing. Highs 73 to 81. .THURSDAY NIGHT...Mostly clear. Lows 50 to 56. .FRIDAY...Sunny. Highs 73 to 81. .FRIDAY NIGHT...Mostly clear. Lows 51 to 57. .SATURDAY...Mostly sunny. Highs 74 to 82. .SATURDAY NIGHT...Mostly clear. Lows 51 to 57. .SUNDAY...Sunny. Highs 79 to 87. .SUNDAY NIGHT...Mostly clear. Lows 54 to 60. .MEMORIAL DAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Highs 78 to 86. Chance of precipitation 30 percent. .MONDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 52 to 58. .TUESDAY...Mostly sunny. Highs 76 to 84. $$ AZZ513-210200- Dragoon and Mule and Huachuca and Santa Rita Mountains- Including Bisbee, Canelo Hills, and Madera Canyon 1138 AM MST Wed May 20 2026 .REST OF TODAY...Mostly cloudy. Highs 76 to 82. .TONIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows 49 to 55. .THURSDAY...Mostly sunny. Highs 76 to 82. .THURSDAY NIGHT...Clear. Lows 52 to 57. .FRIDAY...Sunny. Highs 76 to 82. .FRIDAY NIGHT...Mostly clear. Lows 51 to 57. .SATURDAY...Mostly sunny. Highs 77 to 83. .SATURDAY NIGHT...Mostly clear. Lows 53 to 58. .SUNDAY...Sunny. Highs 81 to 87. .SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Lows 53 to 60. Highs 81 to 87. .TUESDAY...Sunny. Highs 79 to 85. $$ AZZ514-210200- Catalina and Rincon Mountains- Including Mount Lemmon and Summerhaven 1138 AM MST Wed May 20 2026 .REST OF TODAY...Mostly cloudy. Highs 68 to 80. .TONIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows 51 to 57. .THURSDAY...Sunny. Highs 69 to 81. .THURSDAY NIGHT...Clear. Lows 52 to 58. .FRIDAY...Sunny. Highs 69 to 81. .FRIDAY NIGHT...Mostly clear. Lows 53 to 59. .SATURDAY...Sunny. Highs 70 to 82. .SATURDAY NIGHT...Clear. Lows 54 to 60. .SUNDAY...Sunny. Highs 75 to 87. .SUNDAY NIGHT...Mostly clear. Lows 56 to 62. .MEMORIAL DAY...Partly cloudy with a 20 percent chance of showers and thunderstorms. Highs 75 to 87. .MONDAY NIGHT...Mostly clear. Lows 54 to 60. .TUESDAY...Sunny. Highs 73 to 85. $$ AZZ515-210200- Baboquivari Mountains- Including Kitt Peak 1138 AM MST Wed May 20 2026 .REST OF TODAY...Partly cloudy. Highs 75 to 81. .TONIGHT...Mostly cloudy in the evening then clearing. Lows 54 to 59. .THURSDAY...Sunny. Highs 77 to 83. .THURSDAY NIGHT...Clear. Lows 56 to 61. .FRIDAY...Sunny. Highs 78 to 84. .FRIDAY NIGHT...Clear. Lows 56 to 61. .SATURDAY...Sunny. Highs 78 to 84. .SATURDAY NIGHT...Clear. Lows 57 to 62. .SUNDAY AND SUNDAY NIGHT...Clear. Highs 83 to 89. Lows 60 to 65. .MEMORIAL DAY AND MONDAY NIGHT...Mostly clear. Highs 83 to 89. Lows 57 to 62. .TUESDAY...Sunny. Highs 80 to 86. $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson