FPUS55 KTWC 182113 ZFPTWC Zone Forecast Product for Southeast Arizona National Weather Service Tucson AZ 213 PM MST Mon May 18 2026 AZZ501-191400- Western Pima County- Including Ajo and Organ Pipe Cactus N.M. 213 PM MST Mon May 18 2026 .TONIGHT...Clear. Lows 55 to 60. .TUESDAY...Mostly sunny. Highs 87 to 92. .TUESDAY NIGHT...Partly cloudy in the evening then becoming 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 AND SUNDAY NIGHT...Clear. Highs 94 to 99. Lows 64 to 69. .MEMORIAL DAY...Mostly sunny. Highs 94 to 99. $$ AZZ502-191400- Tohono O'odham Nation- Including Sells 213 PM MST Mon May 18 2026 .TONIGHT...Clear. Lows 55 to 60. .TUESDAY...Mostly sunny. Highs 85 to 90. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows 58 to 64. .WEDNESDAY...Mostly cloudy. Highs 87 to 92. .WEDNESDAY NIGHT...Mostly clear. Lows 57 to 63. .THURSDAY...Sunny. Highs 89 to 94. .THURSDAY NIGHT...Mostly clear. Lows 59 to 65. .FRIDAY...Sunny. Highs 89 to 94. .FRIDAY NIGHT THROUGH SATURDAY NIGHT...Mostly clear. Lows 59 to 67. Highs 89 to 94. .SUNDAY...Sunny. Highs 92 to 97. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. Lows 62 to 68. Highs 92 to 97. $$ AZZ503-191400- Upper Santa Cruz River Valley/Altar Valley- Including Nogales 213 PM MST Mon May 18 2026 .TONIGHT...Clear. Lows 47 to 53. .TUESDAY...Mostly sunny. Highs 82 to 88. .TUESDAY NIGHT...Partly cloudy in the evening then becoming 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. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. Lows 55 to 61. Highs 86 to 92. $$ AZZ504-191400- Tucson Metro Area- Including Tucson, Green Valley, Marana, and Vail 213 PM MST Mon May 18 2026 .TONIGHT...Clear. Lows 54 to 60. Southwest wind 10 to 15 mph becoming south after midnight. .TUESDAY...Mostly sunny. Highs 86 to 92. South wind around 10 mph becoming southwest in the afternoon. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows 58 to 64. Southwest wind 5 to 15 mph. .WEDNESDAY...Mostly cloudy. Highs 86 to 92. South wind around 10 mph becoming southwest in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Lows 56 to 62. Southwest wind 10 to 15 mph becoming south after midnight. .THURSDAY...Sunny. Highs 87 to 93. .THURSDAY NIGHT...Mostly clear. Lows 58 to 64. .FRIDAY...Sunny. Highs 87 to 93. .FRIDAY NIGHT THROUGH SATURDAY NIGHT...Mostly clear. Lows 59 to 66. Highs 87 to 93. .SUNDAY...Sunny. Highs 89 to 95. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. Lows 61 to 67. Highs 90 to 96. $$ AZZ505-191400- South Central Pinal County- Including Picacho Peak State Park 213 PM MST Mon May 18 2026 .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 92to 97. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. Lows 65 to 70. Highs 92 to 97. $$ AZZ506-191400- Southeast Pinal County- Including Mammoth and Oracle 213 PM MST Mon May 18 2026 .TONIGHT...Clear. Lows 55 to 60. .TUESDAY...Sunny. Highs 84 to 90. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows 59 to 64. .WEDNESDAY...Mostly cloudy. Highs 84 to 90. .WEDNESDAY NIGHT...Mostly clear. Lows 58 to 63. .THURSDAY...Sunny. Highs 85 to 91. .THURSDAY NIGHT...Mostly clear. Lows 59 to 64. .FRIDAY...Sunny. Highs 86 to 92. .FRIDAY NIGHT...Mostly clear. Lows 60 to 65. .SATURDAY...Sunny. Highs 86 to 92. .SATURDAY NIGHT...Mostly clear. Lows 62 to 67. .SUNDAY...Sunny. Highs 89 to 95. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. Lows 63 to 68. Highs 89 to 95. $$ AZZ507-191400- Upper San Pedro River Valley- Including Sierra Vista and Benson 213 PM MST Mon May 18 2026 .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...Mostly sunny. Highs 81 to 87. .FRIDAY NIGHT THROUGH SATURDAY NIGHT...Mostly clear. Lows 52 to 59. Highs 81 to 87. .SUNDAY...Sunny. Highs 84 to 90. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. Lows 55 to 61. Highs 84 to 90. $$ AZZ508-191400- Eastern Cochise County below 5000 feet- Including Willcox and Douglas 213 PM MST Mon May 18 2026 .TONIGHT...Mostly clear. Lows 48 to 54. .TUESDAY...Mostly sunny. Highs 85 to 90. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows 52 to 58. .WEDNESDAY...Mostly cloudy. Highs 83 to 88. .WEDNESDAY NIGHT...Partly cloudy. Lows 50 to 56. .THURSDAY...Mostly sunny. Highs 83 to 88. .THURSDAY NIGHT...Mostly clear. Lows 50 to 56. .FRIDAY...Mostly sunny. Highs 83 to 88. .FRIDAY NIGHT...Partly cloudy. Lows 51 to 57. .SATURDAY AND SATURDAY NIGHT...Mostly clear. Highs 82 to 87. Lows 54 to 59. .SUNDAY...Sunny. Highs 85 to 90. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. A 10 percent chance of showers and thunderstorms. Lows 56 to 61. Highs 86 to 91. $$ AZZ509-191400- Upper Gila River Valley- Including Clifton and Safford 213 PM MST Mon May 18 2026 .TONIGHT...Mostly clear. Lows 50 to 58. .TUESDAY...Mostly sunny. Highs 83 to 91. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly 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 NIGHT...Mostly clear. Lows 55 to 64. Highs 83 to 94. .MEMORIAL DAY...Mostly sunny with a 10 percent chance of showers and thunderstorms. Highs 86 to 94. $$ AZZ510-191400- White Mountains of Graham and Greenlee Counties- Including Hannagan Meadow 213 PM MST Mon May 18 2026 .TONIGHT...Mostly clear. Lows 41 to 53. .TUESDAY...Mostly sunny. Highs 70 to 80. .TUESDAY NIGHT...Partly cloudy. Lows 45 to 57. .WEDNESDAY...Mostly cloudy. Highs 70 to 80. .WEDNESDAY NIGHT...Partly cloudy. Lows 43 to 55. .THURSDAY...Mostly sunny. Highs 70 to 80. .THURSDAY NIGHT...Mostly clear. Lows 43 to 55. .FRIDAY...Mostly sunny. Highs 71 to 81. .FRIDAY NIGHT THROUGH SUNDAY NIGHT...Mostly clear with a 10 percent chance of showers and thunderstorms. Lows 45 to 60. Highs 73 to 85. .MEMORIAL DAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Highs 75 to 85. Chance of precipitation 30 percent. $$ AZZ511-191400- Galiuro and Pinaleno Mountains- Including Mount Graham 213 PM MST Mon May 18 2026 .TONIGHT...Mostly clear. Lows 48 to 54. .TUESDAY...Mostly sunny. Highs 71 to 81. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly 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...Mostly sunny. Highs 71 to 81. .FRIDAY NIGHT THROUGH SUNDAY NIGHT...Mostly clear. Lows 52 to 62. Highs 72 to 85. .MEMORIAL DAY...Mostly sunny with a 10 percent chance of showers and thunderstorms. Highs 75 to 85. $$ AZZ512-191400- Chiricahua Mountains- Including Chiricahua N.M. 213 PM MST Mon May 18 2026 .TONIGHT...Mostly clear. Lows 47 to 53. .TUESDAY...Mostly sunny. Highs 75 to 83. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows 51 to 57. .WEDNESDAY...Mostly cloudy. Highs 74 to 82. .WEDNESDAY NIGHT...Partly cloudy. Lows 49 to 55. .THURSDAY...Mostly sunny. Highs 73 to 81. .THURSDAY NIGHT...Mostly clear. Lows 49 to 55. .FRIDAY...Mostly sunny. Highs 73 to 81. .FRIDAY NIGHT...Partly cloudy. Lows 50 to 56. .SATURDAY...Partly cloudy with a 20 percent chance of showers and thunderstorms. Highs 73 to 81. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows 51 to 57. Highs 76 to 84. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. A 10 percent chance of showers and thunderstorms. Lows 53 to 59. Highs 77 to 85. $$ AZZ513-191400- Dragoon and Mule and Huachuca and Santa Rita Mountains- Including Bisbee, Canelo Hills, and Madera Canyon 213 PM MST Mon May 18 2026 .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...Mostly sunny. Highs 76 to 82. .FRIDAY NIGHT...Mostly clear. 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. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. Lows 55 to 60. Highs 80 to 86. $$ AZZ514-191400- Catalina and Rincon Mountains- Including Mount Lemmon and Summerhaven 213 PM MST Mon May 18 2026 .TONIGHT...Clear. Lows 48 to 54. .TUESDAY...Mostly sunny. Highs 69 to 81. .TUESDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows 53 to 59. .WEDNESDAY...Mostly cloudy. Highs 69 to 81. .WEDNESDAY NIGHT...Mostly clear. Lows 51 to 57. .THURSDAY...Sunny. Highs 69 to 81. .THURSDAY NIGHT...Mostly clear. Lows 52 to 58. .FRIDAY...Sunny. Highs 69 to 81. .FRIDAY NIGHT...Mostly clear. Lows 53 to 59. .SATURDAY...Mostly sunny with a 10 percent chance of showers and thunderstorms. Highs 71 to 83. .SATURDAY NIGHT...Mostly clear. Lows 55 to 61. .SUNDAY...Sunny with a 10 percent chance of showers and thunderstorms. Highs 74 to 86. .SUNDAY NIGHT AND MEMORIAL DAY...Mostly clear. Lows 56 to 62. Highs 75 to 87. $$ AZZ515-191400- Baboquivari Mountains- Including Kitt Peak 213 PM MST Mon May 18 2026 .TONIGHT...Clear. Lows 50 to 55. .TUESDAY...Mostly sunny. Highs 75 to 81. .TUESDAY NIGHT...Partly cloudy in the evening then becoming 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. .SUNDAY NIGHT AND MEMORIALDAY...Mostly clear. Lows 59 to 64. Highs 82 to 88. $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson