564
FPUS55 KBOI 181837
ZFPBOI
ZONE FORECASTS FOR SOUTHWEST IDAHO/SOUTHEAST OREGON
NATIONAL WEATHER SERVICE BOISE ID
1236 PM MDT FRI SEP 18 2026
SPOT TEMPERATURES ARE FOR TONIGHT, SATURDAY, SATURDAY NIGHT, AND
SUNDAY.
IDZ011-190200-
WEST CENTRAL MOUNTAINS-
1236 PM MDT FRI SEP 18 2026
TONIGHT
RAIN SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS
THIS EVENING, THEN RAIN SHOWERS LIKELY AFTER MIDNIGHT. AREAS OF
FOG. CHANCE OF RAIN 80 PERCENT. LOWS 41 TO 51.
SATURDAY
AREAS OF FOG IN THE MORNING. RAIN SHOWERS LIKELY,
MAINLY IN THE MORNING. CHANCE OF RAIN 60 PERCENT. HIGHS 61 TO 74.
SATURDAY NIGHT
PARTLY CLOUDY. PATCHY FOG IN THE EVENING. AREAS
OF FOG AFTER MIDNIGHT. LOWS 40 TO 50.
SUNDAY
AREAS OF FOG IN THE MORNING. SUNNY. HIGHS 66 TO 79.
SUNDAY NIGHT
MOSTLY CLEAR. AREAS OF FOG AFTER MIDNIGHT. LOWS
43 TO 53.
MONDAY
AREAS OF FOG IN THE MORNING. SUNNY. HIGHS 67 TO 80.
MONDAY NIGHT THROUGH THURSDAY
MOSTLY CLEAR. LOWS 43 TO 53.
HIGHS 67 TO 81.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 45 TO 55. HIGHS
66 TO 79.
TEMPERATURE
MCCALL 42 68 41 73
=
IDZ013-190200-
BOISE MOUNTAINS-
1236 PM MDT FRI SEP 18 2026
..FLASH FLOOD WATCH IN EFFECT UNTIL MIDNIGHT MDT TONIGHT
TONIGHT
RAIN SHOWERS LIKELY WITH A SLIGHT CHANCE OF
THUNDERSTORMS THIS EVENING, THEN A CHANCE OF RAIN SHOWERS AFTER
MIDNIGHT. AREAS OF FOG. CHANCE OF RAIN 60 PERCENT. LOWS 36 TO 51.
SATURDAY
PARTLY SUNNY. AREAS OF FOG IN THE MORNING. A CHANCE
OF RAIN SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. CHANCE OF RAIN 30 PERCENT. HIGHS 60 TO 75.
SATURDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN CLEARING.
PATCHY FOG IN THE EVENING. AREAS OF FOG AFTER MIDNIGHT. LOWS
35 TO 50.
SUNDAY
AREAS OF FOG IN THE MORNING. SUNNY. HIGHS 67 TO 81.
SUNDAY NIGHT
MOSTLY CLEAR. PATCHY FOG AFTER MIDNIGHT. LOWS
37 TO 52.
MONDAY
PATCHY FOG IN THE MORNING. SUNNY. HIGHS 69 TO 83.
MONDAY NIGHT AND TUESDAY
PARTLY CLOUDY. LOWS 39 TO 54. HIGHS
69 TO 83.
TUESDAY NIGHT THROUGH THURSDAY
MOSTLY CLEAR. LOWS 39 TO 54.
HIGHS 71 TO 86.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 40 TO 55. HIGHS
70 TO 85.
TEMPERATURE
IDAHO CITY 41 73 41 79
=
IDZ028-190200-
CAMAS PRAIRIE-
1236 PM MDT FRI SEP 18 2026
..FLASH FLOOD WATCH IN EFFECT UNTIL MIDNIGHT MDT TONIGHT
TONIGHT
INCREASING CLOUDS. A SLIGHT CHANCE OF THUNDERSTORMS
THIS EVENING. A CHANCE OF RAIN SHOWERS. AREAS OF FOG AFTER
MIDNIGHT. CHANCE OF RAIN 30 PERCENT. LOWS 36 TO 42. WEST WINDS
10 TO 15 MPH THIS EVENING, BECOMING LIGHT AFTER MIDNIGHT.
SATURDAY
PARTLY SUNNY. AREAS OF FOG IN THE MORNING. A CHANCE
OF RAIN SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. CHANCE OF RAIN 30 PERCENT. HIGHS 62 TO 67. LIGHT
WINDS.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN CLEARING.
AREAS OF FOG AFTER MIDNIGHT. LOWS 36 TO 42. LIGHT WINDS.
SUNDAY
AREAS OF FOG IN THE MORNING. MOSTLY SUNNY. HIGHS 69 TO
74. LIGHT WINDS.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 40 TO 45. LIGHT WINDS.
MONDAY
SUNNY. HIGHS 72 TO 77.
MONDAY NIGHT AND TUESDAY
PARTLY CLOUDY. LOWS 43 TO 48. HIGHS
73 TO 78.
TUESDAY NIGHT THROUGH THURSDAY
MOSTLY CLEAR. LOWS 42 TO 48.
HIGHS 74 TO 81.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 45 TO 50. HIGHS
76 TO 81.
TEMPERATURE
FAIRFIELD 37 65 37 71
=
IDZ033-190200-
UPPER WEISER RIVER-
1236 PM MDT FRI SEP 18 2026
TONIGHT
SHOWERS LIKELY WITH A SLIGHT CHANCE OF THUNDERSTORMS
THIS EVENING, THEN A CHANCE OF SHOWERS AFTER MIDNIGHT. CHANCE OF
RAIN 60 PERCENT. LOWS 50 TO 55. LIGHT WINDS.
SATURDAY
MOSTLY SUNNY. HIGHS 74 TO 80. NORTH WINDS UP TO
10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS 50 TO 55. LIGHT WINDS.
SUNDAY
SUNNY. HIGHS 76 TO 82. LIGHT WINDS.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 52 TO 57. LIGHT WINDS.
MONDAY THROUGH THURSDAY
MOSTLY CLEAR. HIGHS 78 TO 86. LOWS
52 TO 58.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 54 TO 59. HIGHS
78 TO 84.
TEMPERATURE
COUNCIL 52 78 51 82
CAMBRIDGE 51 79 50 82
=
ORZ064-190200-
OREGON LOWER TREASURE VALLEY-
1236 PM MDT FRI SEP 18 2026 /1136 AM PDT FRI SEP 18 2026/
TONIGHT
PARTLY CLOUDY. LOWS 50 TO 56. NORTHWEST WINDS UP TO
10 MPH.
SATURDAY
SUNNY. HIGHS 79 TO 84. NORTHWEST WINDS UP TO 10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS 49 TO 56. LIGHT WINDS.
SUNDAY
SUNNY. HIGHS 80 TO 85. LIGHT WINDS.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 50 TO 57. LIGHT WINDS.
MONDAY THROUGH THURSDAY
MOSTLY CLEAR. HIGHS 81 TO 89. LOWS
50 TO 58.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 52 TO 58. HIGHS
82 TO 87.
TEMPERATURE
ONTARIO 50 81 49 83
=
IDZ012-190200-
LOWER TREASURE VALLEY-
1236 PM MDT FRI SEP 18 2026
TONIGHT
MOSTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS.
AREAS OF FOG AFTER MIDNIGHT. LOWS 50 TO 55. NORTH WINDS UP TO
10 MPH.
SATURDAY
AREAS OF FOG IN THE MORNING. MOSTLY SUNNY. HIGHS
77 TO 82. NORTHWEST WINDS 10 TO 15 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. PATCHY FOG AFTER MIDNIGHT. LOWS
50 TO 55. LIGHT WINDS.
SUNDAY
AREAS OF FOG IN THE MORNING. SUNNY. HIGHS 79 TO 84.
LIGHT WINDS.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 51 TO 56. LIGHT WINDS.
MONDAY
SUNNY. HIGHS 81 TO 86.
MONDAY NIGHT
PARTLY CLOUDY. LOWS 53 TO 58.
TUESDAY THROUGH THURSDAY
MOSTLY CLEAR. HIGHS 81 TO 89. LOWS
52 TO 57.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 54 TO 59. HIGHS
82 TO 87.
TEMPERATURE
CALDWELL 51 80 50 82
=
IDZ014-190200-
UPPER TREASURE VALLEY-
1236 PM MDT FRI SEP 18 2026
TONIGHT
MOSTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS.
PATCHY SMOKE THIS EVENING. AREAS OF FOG AFTER MIDNIGHT. LOWS
48 TO 54. NORTHWEST WINDS 10 TO 15 MPH. GUSTS TO 25 MPH THIS
EVENING.
SATURDAY
AREAS OF FOG IN THE MORNING. MOSTLY SUNNY. HIGHS
73 TO 78. NORTHWEST WINDS 10 TO 15 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. AREAS OF FOG AFTER MIDNIGHT. LOWS
48 TO 54. NORTHWEST WINDS UP TO 10 MPH IN THE EVENING, BECOMING
LIGHT AFTER MIDNIGHT. GUSTS TO 20 MPH.
SUNDAY
AREAS OF FOG IN THE MORNING. SUNNY. HIGHS 78 TO 83.
SOUTHEAST WINDS UP TO 10 MPH.
SUNDAY NIGHT
MOSTLY CLEAR. PATCHY FOG AFTER MIDNIGHT. LOWS
50 TO 56. EAST WINDS UP TO 10 MPH.
MONDAY
AREAS OF FOG IN THE MORNING. SUNNY. HIGHS 80 TO 85.
MONDAY NIGHT AND TUESDAY
PARTLY CLOUDY. LOWS 52 TO 57. HIGHS
81 TO 86.
TUESDAY NIGHT THROUGH THURSDAY
MOSTLY CLEAR. LOWS 51 TO 58.
HIGHS 82 TO 90. BREEZY.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 54 TO 61. HIGHS
84 TO 89. BREEZY.
TEMPERATURE
BOISE 54 77 54 81
MOUNTAIN HOME 49 77 48 81
=
IDZ016-190200-
WESTERN MAGIC VALLEY-
1236 PM MDT FRI SEP 18 2026
TONIGHT
PARTLY CLOUDY THIS EVENING, THEN MOSTLY CLOUDY WITH A
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT.
CHANCE OF RAIN 30 PERCENT. LOWS 45 TO 50. SOUTHWEST WINDS 10 TO
15 MPH WITH GUSTS TO 25 MPH.
SATURDAY
PARTLY CLOUDY. A CHANCE OF RAIN SHOWERS IN THE
MORNING. AREAS OF FOG IN THE MORNING. CHANCE OF RAIN 30 PERCENT.
HIGHS 66 TO 71. WEST WINDS 10 TO 15 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. PATCHY FOG. LOWS 44 TO 49. LIGHT
WINDS IN THE EVENING, BECOMING SOUTHEAST AROUND 10 MPH AFTER
MIDNIGHT.
SUNDAY
PATCHY FOG IN THE MORNING. SUNNY. HIGHS 73 TO 78. EAST
WINDS UP TO 10 MPH.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 47 TO 52. EAST WINDS UP TO
10 MPH.
MONDAY
SUNNY. HIGHS 77 TO 82.
MONDAY NIGHT THROUGH TUESDAY NIGHT
PARTLY CLOUDY. LOWS 49 TO
55. HIGHS 77 TO 82.
WEDNESDAY THROUGH THURSDAY
MOSTLY CLEAR. HIGHS 79 TO 86. LOWS
50 TO 55.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 52 TO 57. HIGHS
81 TO 86. BREEZY.
TEMPERATURE
JEROME 47 67 46 74
TWIN FALLS 46 67 44 74
=
IDZ029-190200-
OWYHEE MOUNTAINS-
1236 PM MDT FRI SEP 18 2026
TONIGHT
PARTLY CLOUDY. LOWS 44 TO 54.
SATURDAY
MOSTLY SUNNY. HIGHS 69 TO 74.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS 44 TO 54.
SUNDAY
SUNNY. HIGHS 72 TO 79.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 48 TO 55.
MONDAY THROUGH TUESDAY
PARTLY CLOUDY. HIGHS 74 TO 81. LOWS
49 TO 58.
TUESDAY NIGHT THROUGH THURSDAY
MOSTLY CLEAR. LOWS 49 TO 57.
HIGHS 76 TO 86.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 53 TO 60. HIGHS
76 TO 82.
=
IDZ015-190200-
SOUTHWEST HIGHLANDS-
1236 PM MDT FRI SEP 18 2026
TONIGHT
PARTLY CLOUDY. LOWS 41 TO 48.
SATURDAY
MOSTLY SUNNY. HIGHS 67 TO 72.
SATURDAY NIGHT
DECREASING CLOUDS. LOWS 41 TO 48.
SUNDAY
PATCHY FOG IN THE MORNING. SUNNY. HIGHS 73 TO 78.
SUNDAY NIGHT
PARTLY CLOUDY. PATCHY FOG AFTER MIDNIGHT. LOWS
46 TO 51.
MONDAY
AREAS OF FOG IN THE MORNING. MOSTLY SUNNY. HIGHS 76 TO
81.
MONDAY NIGHT AND TUESDAY
PARTLY CLOUDY. LOWS 49 TO 54. HIGHS
75 TO 81.
TUESDAY NIGHT THROUGH THURSDAY
MOSTLY CLEAR. LOWS 48 TO 54.
HIGHS 79 TO 86.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 51 TO 56. HIGHS
80 TO 85. BREEZY.
=
IDZ030-190200-
SOUTHERN TWIN FALLS COUNTY-
1236 PM MDT FRI SEP 18 2026
TONIGHT
PARTLY CLOUDY THIS EVENING, THEN MOSTLY CLOUDY WITH A
SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. CHANCE OF RAIN
20 PERCENT. LOWS 43 TO 49.
SATURDAY
PARTLY SUNNY. PATCHY FOG IN THE MORNING. A CHANCE OF
RAIN SHOWERS, MAINLY IN THE MORNING. CHANCE OF RAIN 40 PERCENT.
HIGHS 64 TO 69.
SATURDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN CLEARING.
LOWS 42 TO 47.
SUNDAY
PATCHY FOG IN THE MORNING. SUNNY. HIGHS 71 TO 76.
SUNDAY NIGHT
INCREASING CLOUDS. LOWS 45 TO 50.
MONDAY THROUGH TUESDAY NIGHT
PARTLY CLOUDY. HIGHS 75 TO 80.
LOWS 48 TO 55.
WEDNESDAY THROUGH THURSDAY
MOSTLY CLEAR. HIGHS 77 TO 85. LOWS
50 TO 55.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 52 TO 57. HIGHS
79 TO 84. BREEZY.
=
ORZ062-190200-
BAKER COUNTY-
1136 AM PDT FRI SEP 18 2026
TONIGHT
PARTLY CLOUDY. A SLIGHT CHANCE OF RAIN SHOWERS THIS
EVENING. PATCHY FOG AFTER MIDNIGHT. CHANCE OF RAIN 20 PERCENT.
LOWS 39 TO 52. NORTHWEST WINDS UP TO 10 MPH WITH GUSTS TO 20 MPH.
SATURDAY
AREAS OF FOG IN THE MORNING. SUNNY. HIGHS 72 TO 79.
NORTHWEST WINDS UP TO 10 MPH.
SATURDAY NIGHT
INCREASING CLOUDS. LOWS 40 TO 54. LIGHT WINDS.
SUNDAY
AREAS OF FOG IN THE MORNING. SUNNY. HIGHS 75 TO 82.
LIGHT WINDS.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 42 TO 56. LIGHT WINDS.
MONDAY
SUNNY. HIGHS 76 TO 84.
MONDAY NIGHT
PARTLY CLOUDY. LOWS 43 TO 56.
TUESDAY
SUNNY. HIGHS 76 TO 84.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS 41 TO 55.
WEDNESDAY THROUGH THURSDAY
MOSTLY CLEAR. HIGHS 75 TO 85. LOWS
41 TO 55.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 42 TO 56. HIGHS
73 TO 82.
TEMPERATURE
BAKER CITY 39 76 40 80
=
ORZ061-190200-
HARNEY COUNTY-
1136 AM PDT FRI SEP 18 2026
TONIGHT
MOSTLY CLEAR. LOWS 36 TO 46. NORTHWEST WINDS 10 TO
15 MPH WITH GUSTS TO 25 MPH THIS EVENING, BECOMING LIGHT AFTER
MIDNIGHT.
SATURDAY
PATCHY FOG IN THE MORNING. SUNNY. HIGHS 69 TO 77.
LIGHT WINDS.
SATURDAY NIGHT
INCREASING CLOUDS. LOWS 37 TO 48. LIGHT WINDS.
SUNDAY
SUNNY. HIGHS 72 TO 80. EAST WINDS UP TO 10 MPH.
SUNDAY NIGHT
INCREASING CLOUDS. LOWS 40 TO 51. EAST WINDS UP
TO 10 MPH.
MONDAY AND MONDAY NIGHT
PARTLY CLOUDY. HIGHS 74 TO 82. LOWS
41 TO 52.
TUESDAY THROUGH THURSDAY
MOSTLY CLEAR. HIGHS 75 TO 85. LOWS
40 TO 52.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 41 TO 53. HIGHS
73 TO 81.
TEMPERATURE
BURNS 36 76 37 79
=
ORZ063-190200-
MALHEUR COUNTY-
1236 PM MDT FRI SEP 18 2026 /1136 AM PDT FRI SEP 18 2026/
TONIGHT
MOSTLY CLEAR. LOWS 42 TO 52. NORTHWEST WINDS UP TO
10 MPH.
SATURDAY
PATCHY FOG IN THE MORNING. SUNNY. HIGHS 73 TO 80.
NORTHWEST WINDS UP TO 10 MPH WITH GUSTS TO 20 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS 43 TO 53. LIGHT WINDS.
SUNDAY
SUNNY. HIGHS 77 TO 82. LIGHT WINDS IN THE MORNING,
BECOMING EAST UP TO 10 MPH IN THE AFTERNOON.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 46 TO 56. NORTHEAST WINDS UP
TO 10 MPH.
MONDAY AND MONDAY NIGHT
PARTLY CLOUDY. HIGHS 78 TO 83. LOWS
48 TO 57.
TUESDAY THROUGH THURSDAY
MOSTLY CLEAR. HIGHS 79 TO 89. LOWS
47 TO 57.
THURSDAY NIGHT AND FRIDAY
PARTLY CLOUDY. LOWS 50 TO 58. HIGHS
78 TO 85.
=
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