FPUS55 KTWC 181840 ZFPTWC Zone Forecast Product for Southeast Arizona National Weather Service Tucson AZ 1139 AM MST Mon May 18 2026 AZZ501-190200- Western Pima County- Including Ajo and Organ Pipe Cactus N.M. 1139 AM MST Mon May 18 2026 .REST OF TODAY...Sunny. Highs 83 to 88. .TONIGHT...Mostly clear. Lows 55 to 60. .TUESDAY...Mostly sunny. Highs 87 to 92. .TUESDAY NIGHT...Mostly cloudy. Lows 60 to 65. .WEDNESDAY...Partly cloudy. Highs 89 to 94. .WEDNESDAY NIGHT...Mostly clear. Lows 59 to 64. .THURSDAY...Sunny. Highs 91 to 96. .THURSDAY NIGHT...Mostly clear. Lows 60 to 65. .FRIDAY...Sunny. Highs 91 to 96. .FRIDAY NIGHT...Mostly clear. Lows 61 to 66. .SATURDAY...Sunny. Highs 91 to 96. .SATURDAY NIGHT...Mostly clear. Lows 63 to 68. .SUNDAY...Sunny. Highs 94 to 99. $$ AZZ502-190200- Tohono O'odham Nation- Including Sells 1139 AM MST Mon May 18 2026 .REST OF TODAY...Sunny. Highs 81 to 86. .TONIGHT...Clear. Lows 55 to 60. .TUESDAY...Mostly sunny. Highs 85 to 90. .TUESDAY NIGHT...Mostly cloudy. Lows 58 to 64. .WEDNESDAY...Mostly cloudy. Highs 87 to 92. .WEDNESDAY NIGHT...Mostly clear. Lows 57 to 63. .THURSDAY...Sunny. Highs 89 to 94. .THURSDAY NIGHT...Mostly clear. Lows 59 to 65. .FRIDAY...Sunny. Highs 89 to 94. .FRIDAY NIGHT THROUGH SATURDAY NIGHT...Mostly clear. Lows 59 to 67. Highs 89 to 94. .SUNDAY...Sunny. Highs 92 to 97. $$ AZZ503-190200- Upper Santa Cruz River Valley/Altar Valley- Including Nogales 1139 AM MST Mon May 18 2026 .REST OF TODAY...Windy, sunny. Highs 78 to 84. Southwest wind 20 to 30 mph. .TONIGHT...Clear. Lows 47 to 53. .TUESDAY...Mostly sunny. Highs 82 to 88. .TUESDAY NIGHT...Mostly cloudy. Lows 51 to 57. .WEDNESDAY...Mostly cloudy. Highs 82 to 88. .WEDNESDAY NIGHT...Mostly clear. Lows 50 to 56. .THURSDAY...Sunny. Highs 83 to 89. .THURSDAY NIGHT...Clear. Lows 51 to 57. .FRIDAY...Sunny. Highs 83 to 89. .FRIDAY NIGHT THROUGH SATURDAY NIGHT...Mostly clear. Lows 52 to 60. Highs 83 to 89. .SUNDAY...Sunny. Highs 86 to 92. $$ AZZ504-190200- Tucson Metro Area- Including Tucson, Green Valley, Marana, and Vail 1139 AM MST Mon May 18 2026 .REST OF TODAY...Breezy, sunny. Highs 82 to 88. Southwest wind 15 to 25 mph. .TONIGHT...Clear. Lows 54 to 60. Southwest wind 10 to 15 mph becoming south after midnight. .TUESDAY...Mostly sunny. Highs 86 to 92. South wind around 10 mph becoming southwest in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows 58 to 64. Southwest wind 5 to 15 mph. .WEDNESDAY...Mostly cloudy. Highs 86 to 92. South wind around 10 mph becoming southwest in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Lows 56 to 62. .THURSDAY...Sunny. Highs 87 to 93. .THURSDAY NIGHT...Mostly clear. Lows 58 to 64. .FRIDAY...Sunny. Highs 87 to 93. .FRIDAY NIGHT THROUGH SATURDAY NIGHT...Mostly clear. Lows 59 to 66. Highs 87 to 93. .SUNDAY...Sunny. Highs 89 to 95. $$ AZZ505-190200- South Central Pinal County- Including Picacho Peak State Park 1139 AM MST Mon May 18 2026 .REST OF TODAY...Sunny. Highs 82 to 87. .TONIGHT...Clear. Lows 55 to 61. .TUESDAY...Mostly sunny. Highs 86 to 91. .TUESDAY NIGHT...Partly cloudy. Lows 59 to 65. .WEDNESDAY...Mostly cloudy. Highs 87 to 92. .WEDNESDAY NIGHT...Mostly clear. Lows 58 to 64. .THURSDAY...Sunny. Highs 89 to 94. .THURSDAY NIGHT...Mostly clear. Lows 59 to 65. .FRIDAY...Sunny. Highs 89 to 94. .FRIDAY NIGHT...Mostly clear. Lows 61 to 66. .SATURDAY...Sunny. Highs 89 to 94. .SATURDAY NIGHT...Mostly clear. Lows 63 to 68. .SUNDAY...Sunny. Highs 92 to 97. $$ AZZ506-190200- Southeast Pinal County- Including Mammoth and Oracle 1139 AM MST Mon May 18 2026 .REST OF TODAY...Breezy, sunny. Highs 80 to 86. West wind 15 to 25 mph. .TONIGHT...Clear. Lows 55 to 60. .TUESDAY...Sunny. Highs 84 to 90. .TUESDAY NIGHT...Partly cloudy. Lows 59 to 64. .WEDNESDAY...Mostly cloudy. Highs 84 to 90. .WEDNESDAY NIGHT...Mostly clear. Lows 58 to 63. .THURSDAY...Sunny. Highs 85 to 91. .THURSDAY NIGHT...Mostly clear. Lows 59 to 64. .FRIDAY...Sunny. Highs 86 to 92. .FRIDAY NIGHT...Mostly clear. Lows 60 to 65. .SATURDAY...Sunny. Highs 86 to 92. .SATURDAY NIGHT...Mostly clear. Lows 62 to 67. .SUNDAY...Sunny. Highs 89 to 95. $$ AZZ507-190200- Upper San Pedro River Valley- Including Sierra Vista and Benson 1139 AM MST Mon May 18 2026 .REST OF TODAY...Breezy, sunny. Highs 79 to 84. Southwest wind 15 to 25 mph. .TONIGHT...Clear. Lows 47 to 53. .TUESDAY...Mostly sunny. Highs 83 to 88. .TUESDAY NIGHT...Partly cloudy. Lows 51 to 57. .WEDNESDAY...Mostly cloudy. Highs 82 to 87. .WEDNESDAY NIGHT...Partly cloudy. Lows 50 to 56. .THURSDAY...Sunny. Highs 82 to 87. .THURSDAY NIGHT...Mostly clear. Lows 51 to 57. .FRIDAY THROUGH SATURDAY NIGHT...Mostly clear. Highs 81 to 87. Lows 52 to 59. .SUNDAY...Sunny. Highs 84 to 90. $$ AZZ508-190200- Eastern Cochise County below 5000 feet- Including Willcox and Douglas 1139 AM MST Mon May 18 2026 .REST OF TODAY...Breezy, sunny. Highs 81 to 86. Southwest wind 15 to 25 mph. .TONIGHT...Mostly clear. Lows 48 to 54. .TUESDAY...Mostly sunny. Highs 85 to 90. .TUESDAY NIGHT...Partly cloudy. Lows 52 to 58. .WEDNESDAY...Mostly cloudy. Highs 83 to 88. .WEDNESDAY NIGHT...Partly cloudy. Lows 50 to 56. .THURSDAY...Mostly sunny. Highs 83 to 88. .THURSDAY NIGHT...Mostly clear. Lows 50 to 56. .FRIDAY...Mostly sunny. Highs 83 to 88. .FRIDAY NIGHT...Partly cloudy. Lows 51 to 57. .SATURDAY AND SATURDAY NIGHT...Mostly clear. Highs 82 to 87. Lows 54 to 59. .SUNDAY...Sunny. Highs 85 to 90. $$ AZZ509-190200- Upper Gila River Valley- Including Clifton and Safford 1139 AM MST Mon May 18 2026 .REST OF TODAY...Breezy, sunny. Highs 79 to 87. West wind 15 to 25 mph. .TONIGHT...Mostly clear. Lows 50 to 58. .TUESDAY...Mostly sunny. Highs 83 to 91. .TUESDAY NIGHT...Partly cloudy. Lows 55 to 61. .WEDNESDAY...Mostly cloudy. Highs 82 to 90. .WEDNESDAY NIGHT...Partly cloudy. Lows 52 to 60. .THURSDAY...Mostly sunny. Highs 82 to 90. .THURSDAY NIGHT...Mostly clear. Lows 52 to 60. .FRIDAY...Sunny. Highs 83 to 91. .FRIDAY NIGHT THROUGH SUNDAY...Mostly clear. Lows 55 to 63. Highs 83 to 94. $$ AZZ510-190200- White Mountains of Graham and Greenlee Counties- Including Hannagan Meadow 1139 AM MST Mon May 18 2026 .REST OF TODAY...Sunny. Highs 66 to 76. .TONIGHT...Mostly clear. Lows 41 to 53. .TUESDAY...Mostly sunny. Highs 70 to 80. .TUESDAY NIGHT...Partly cloudy. Lows 45 to 57. .WEDNESDAY...Mostly cloudy. Highs 70 to 80. .WEDNESDAY NIGHT...Partly cloudy. Lows 43 to 55. .THURSDAY...Mostly sunny. Highs 70 to 80. .THURSDAY NIGHT...Mostly clear. Lows 43 to 55. .FRIDAY THROUGH SUNDAY...Mostly clear. Highs 71 to 85. Lows 45 to 58. $$ AZZ511-190200- Galiuro and Pinaleno Mountains- Including Mount Graham 1139 AM MST Mon May 18 2026 .REST OF TODAY...Breezy, sunny. Highs 67 to 77. West wind 15 to 25 mph. .TONIGHT...Mostly clear. Lows 48 to 54. .TUESDAY...Mostly sunny. Highs 71 to 81. .TUESDAY NIGHT...Partly cloudy. Lows 52 to 58. .WEDNESDAY...Mostly cloudy. Highs 71 to 81. .WEDNESDAY NIGHT...Partly cloudy. Lows 50 to 56. .THURSDAY...Sunny. Highs 71 to 81. .THURSDAY NIGHT...Mostly clear. Lows 51 to 57. .FRIDAY THROUGH SUNDAY...Mostly clear. Highs 71 to 85. Lows 52 to 60. $$ AZZ512-190200- Chiricahua Mountains- Including Chiricahua N.M. 1139 AM MST Mon May 18 2026 .REST OF TODAY...Breezy, sunny. Highs 72 to 80. Southwest wind 15 to 25 mph. .TONIGHT...Mostly clear. Lows 47 to 53. .TUESDAY...Mostly sunny. Highs 75 to 83. .TUESDAY NIGHT...Mostly cloudy. Lows 51 to 57. .WEDNESDAY...Mostly cloudy. Highs 74 to 82. .WEDNESDAY NIGHT...Partly cloudy. Lows 49 to 55. .THURSDAY...Mostly sunny. Highs 73 to 81. .THURSDAY NIGHT...Mostly clear. Lows 49 to 55. .FRIDAY...Mostly sunny. Highs 73 to 81. .FRIDAY NIGHT...Partly cloudy. Lows 50 to 56. .SATURDAY...Partly cloudy with a 20 percent chance of showers and thunderstorms. Highs 73 to 81. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows 51 to 57. Highs 76 to 84. $$ AZZ513-190200- Dragoon and Mule and Huachuca and Santa Rita Mountains- Including Bisbee, Canelo Hills, and Madera Canyon 1139 AM MST Mon May 18 2026 .REST OF TODAY...Windy, sunny. Highs 73 to 79. Southwest wind 20 to 30 mph. .TONIGHT...Clear. Lows 47 to 52. .TUESDAY...Mostly sunny. Highs 76 to 84. Gusts up to 35 mph in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows 52 to 57. .WEDNESDAY...Mostly cloudy. Highs 76 to 82. .WEDNESDAY NIGHT...Partly cloudy. Lows 50 to 55. .THURSDAY...Sunny. Highs 76 to 82. .THURSDAY NIGHT...Mostly clear. Lows 51 to 56. .FRIDAY AND FRIDAY NIGHT...Mostly clear. Highs 76 to 82. Lows 52 to 57. .SATURDAY...Partly cloudy with a 20 percent chance of showers and thunderstorms. Highs 76 to 82. .SATURDAY NIGHT...Mostly clear. Lows 53 to 58. .SUNDAY...Partly cloudy. Highs 79 to 85. $$ AZZ514-190200- Catalina and Rincon Mountains- Including Mount Lemmon and Summerhaven 1139 AM MST Mon May 18 2026 .REST OF TODAY...Breezy, sunny. Highs 65 to 77. Southwest wind 15 to 25 mph. .TONIGHT...Clear. Lows 48 to 54. .TUESDAY...Mostly sunny. Highs 69 to 81. .TUESDAY NIGHT...Partly cloudy. Lows 53 to 59. .WEDNESDAY...Mostly cloudy. Highs 69 to 81. .WEDNESDAY NIGHT...Mostly clear. Lows 51 to 57. .THURSDAY...Sunny. Highs 69 to 81. .THURSDAY NIGHT...Mostly clear. Lows 52 to 58. .FRIDAY...Sunny. Highs 69 to 81. .FRIDAY NIGHT...Mostly clear. Lows 53 to 59. .SATURDAY...Mostly sunny with a 10 percent chance of showers and thunderstorms. Highs 71 to 83. .SATURDAY NIGHT...Mostly clear. Lows 55 to 61. .SUNDAY...Sunny with a 10 percent chance of showers and thunderstorms. Highs 74 to 86. $$ AZZ515-190200- Baboquivari Mountains- Including Kitt Peak 1139 AM MST Mon May 18 2026 .REST OF TODAY...Breezy, sunny. Highs 71 to 77. Southwest wind 15 to 25 mph. .TONIGHT...Clear. Lows 50 to 55. .TUESDAY...Mostly sunny. Highs 75 to 81. .TUESDAY NIGHT...Mostly cloudy. Lows 55 to 60. .WEDNESDAY...Mostly cloudy. Highs 76 to 82. .WEDNESDAY NIGHT...Mostly clear. 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 THROUGH SATURDAY NIGHT...Mostly clear. Lows 57 to 63. Highs 79 to 85. .SUNDAY...Sunny. Highs 82 to 88. $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson