771
FPUS55 KBOI 201836
ZFPBOI
ZONE FORECASTS FOR SOUTHWEST IDAHO/SOUTHEAST OREGON
NATIONAL WEATHER SERVICE BOISE ID
1236 PM MDT WED MAY 20 2026
FORECAST UPDATED.
SPOT TEMPERATURES ARE FOR THE REST OF TODAY, TONIGHT, AND
THURSDAY.
IDZ011-210200-
WEST CENTRAL MOUNTAINS-
1236 PM MDT WED MAY 20 2026
REST OF TODAY
PARTLY SUNNY. HIGHS 54 TO 69.
TONIGHT
PARTLY CLOUDY. PATCHY FOG AFTER MIDNIGHT. LOWS 32 TO
42.
THURSDAY
PATCHY FOG IN THE MORNING. SUNNY. HIGHS 56 TO 70.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS 34 TO 45.
FRIDAY
MOSTLY SUNNY. HIGHS 60 TO 74.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLEAR. LOWS 37 TO 48. HIGHS
66 TO 80.
SATURDAY NIGHT AND SUNDAY
PARTLY CLOUDY. LOWS 43 TO 53. HIGHS
66 TO 81.
SUNDAY NIGHT
INCREASING CLOUDS. LOWS 42 TO 52.
MEMORIAL DAY
MOSTLY SUNNY. HIGHS 64 TO 78.
MONDAY NIGHT
MOSTLY CLOUDY WITH A 20 PERCENT CHANCE OF RAIN
SHOWERS. LOWS 38 TO 47.
TUESDAY
PARTLY CLOUDY WITH A CHANCE OF RAIN AND SNOW SHOWERS.
CHANCE OF PRECIPITATION 30 PERCENT. COOLER WITH HIGHS 51 TO 63.
TEMPERATURE
MCCALL 63 34 65
=
IDZ013-210200-
BOISE MOUNTAINS-
1236 PM MDT WED MAY 20 2026
REST OF TODAY
PARTLY SUNNY. HIGHS 58 TO 72.
TONIGHT
MOSTLY CLEAR. LOWS 28 TO 43.
THURSDAY
SUNNY. HIGHS 60 TO 74.
THURSDAY NIGHT
INCREASING CLOUDS. LOWS 31 TO 46.
FRIDAY
MOSTLY SUNNY. HIGHS 62 TO 76.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLEAR. LOWS 34 TO 49. HIGHS
71 TO 86.
SATURDAY NIGHT THROUGH MEMORIAL DAY
MOSTLY CLEAR. LOWS 40 TO
55. HIGHS 71 TO 85.
MONDAY NIGHT
PARTLY CLOUDY. LOWS 36 TO 51.
TUESDAY
PARTLY CLOUDY. A CHANCE OF RAIN SHOWERS, MAINLY IN THE
AFTERNOON. CHANCE OF RAIN 30 PERCENT. COOLER WITH HIGHS 55 TO 70.
TEMPERATURE
IDAHO CITY 71 34 73
=
IDZ028-210200-
CAMAS PRAIRIE-
1236 PM MDT WED MAY 20 2026
REST OF TODAY
PARTLY SUNNY. HIGHS 63 TO 68. BREEZY. WEST WINDS
10 TO 20 MPH WITH GUSTS TO 30 MPH.
TONIGHT
DECREASING CLOUDS. LOWS 32 TO 37. BREEZY. NORTHWEST
WINDS 10 TO 20 MPH. GUSTS TO 30 MPH IN THE EVENING.
THURSDAY
SUNNY. HIGHS 64 TO 69. NORTH WINDS UP TO 10 MPH WITH
GUSTS TO 20 MPH.
THURSDAY NIGHT
INCREASING CLOUDS. LOWS 33 TO 38. NORTH WINDS
10 TO 15 MPH.
FRIDAY
PARTLY SUNNY IN THE MORNING, THEN CLEARING. HIGHS 67 TO
72. EAST WINDS AROUND 10 MPH IN THE MORNING, SHIFTING TO SOUTH IN
THE AFTERNOON.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLEAR. WARMER. LOWS 34 TO 40.
HIGHS 77 TO 82.
SATURDAY NIGHT THROUGH MEMORIAL DAY
MOSTLY CLEAR. LOWS 40 TO
47. HIGHS 77 TO 82. BREEZY.
MONDAY NIGHT
PARTLY CLOUDY. LOWS 39 TO 44. BREEZY.
TUESDAY
PARTLY CLOUDY. A SLIGHT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. CHANCE OF RAIN 20 PERCENT. COOLER WITH HIGHS 66 TO 71.
BREEZY.
TEMPERATURE
FAIRFIELD 67 32 67
=
IDZ033-210200-
UPPER WEISER RIVER-
1236 PM MDT WED MAY 20 2026
REST OF TODAY
MOSTLY SUNNY. HIGHS 68 TO 75. WEST WINDS UP TO
10 MPH.
TONIGHT
MOSTLY CLEAR. LOWS 43 TO 48. NORTH WINDS 10 TO 15 MPH
WITH GUSTS TO 25 MPH.
THURSDAY
SUNNY. HIGHS 70 TO 75. NORTH WINDS 10 TO 15 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS 43 TO 48. NORTH WINDS UP TO
10 MPH WITH GUSTS TO 20 MPH.
FRIDAY
SUNNY. HIGHS 72 TO 78. LIGHT WINDS.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS
79 TO 86.
SATURDAY NIGHT
INCREASING CLOUDS. LOWS 52 TO 57.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR. HIGHS 78 TO 87. LOWS
51 TO 57.
MONDAY NIGHT
MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT. CHANCE OF RAIN 20 PERCENT. LOWS 45 TO 50. BREEZY.
TUESDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS, MAINLY IN THE
MORNING. CHANCE OF RAIN 30 PERCENT. MUCH COOLER WITH HIGHS 63 TO
69.
TEMPERATURE
COUNCIL 72 43 74
CAMBRIDGE 75 44 75
=
ORZ064-210200-
OREGON LOWER TREASURE VALLEY-
1236 PM MDT WED MAY 20 2026 /1136 AM PDT WED MAY 20 2026/
REST OF TODAY
SUNNY. HIGHS 74 TO 79. NORTH WINDS UP TO 10 MPH.
TONIGHT
PARTLY CLOUDY IN THE EVENING, THEN CLEARING. LOWS
47 TO 52. BREEZY. NORTH WINDS 10 TO 20 MPH WITH GUSTS TO 35 MPH.
THURSDAY
SUNNY. HIGHS 75 TO 80. NORTH WINDS 10 TO 15 MPH.
THURSDAY NIGHT
DECREASING CLOUDS. LOWS 46 TO 51. NORTHWEST
WINDS AROUND 10 MPH WITH GUSTS TO 20 MPH.
FRIDAY
SUNNY. HIGHS 78 TO 83. LIGHT WINDS.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLEAR. LOWS 48 TO 53. HIGHS
85 TO 90.
SATURDAY NIGHT
INCREASING CLOUDS. LOWS 56 TO 61.
SUNDAY AND SUNDAY NIGHT
MOSTLY CLEAR. HIGHS 86 TO 91. LOWS
54 TO 59.
MEMORIAL DAY
MOSTLY SUNNY. HIGHS 83 TO 88.
MONDAY NIGHT AND TUESDAY
MOSTLY CLOUDY. A 20 PERCENT CHANCE OF
SHOWERS. NOT AS WARM. LOWS 47 TO 52. HIGHS 66 TO 71. WINDY.
TEMPERATURE
ONTARIO 77 48 78
=
IDZ012-210200-
LOWER TREASURE VALLEY-
1236 PM MDT WED MAY 20 2026
REST OF TODAY
SUNNY. HIGHS 73 TO 78. NORTHWEST WINDS 10 TO
15 MPH.
TONIGHT
DECREASING CLOUDS. LOWS 46 TO 51. NORTHWEST WINDS
10 TO 15 MPH WITH GUSTS TO 25 MPH.
THURSDAY
SUNNY. HIGHS 74 TO 79. NORTHWEST WINDS 10 TO 15 MPH
WITH GUSTS TO 25 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS 45 TO 50. NORTHWEST WINDS
UP TO 10 MPH WITH GUSTS TO 20 MPH.
FRIDAY
SUNNY. HIGHS 77 TO 82. LIGHT WINDS.
FRIDAY NIGHT
CLEAR. LOWS 48 TO 53.
SATURDAY
SUNNY. HIGHS 85 TO 90.
SATURDAY NIGHT
INCREASING CLOUDS. LOWS 55 TO 60.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR. HIGHS 84 TO 91. LOWS
53 TO 58.
MONDAY NIGHT
PARTLY CLOUDY. LOWS 46 TO 51. BREEZY.
TUESDAY
PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SHOWERS.
MUCH COOLER WITH HIGHS 68 TO 73. BREEZY.
TEMPERATURE
CALDWELL 76 47 76
=
IDZ014-210200-
UPPER TREASURE VALLEY-
1236 PM MDT WED MAY 20 2026
REST OF TODAY
MOSTLY SUNNY. HIGHS 73 TO 78. NORTHWEST WINDS
10 TO 15 MPH WITH GUSTS TO 25 MPH.
TONIGHT
INCREASING CLOUDS. LOWS 44 TO 49. BREEZY. NORTHWEST
WINDS 10 TO 20 MPH WITH GUSTS TO 30 MPH.
THURSDAY
SUNNY. HIGHS 73 TO 78. WINDY. NORTHWEST WINDS 15 TO
25 MPH WITH GUSTS TO 40 MPH.
THURSDAY NIGHT
INCREASING CLOUDS. LOWS 42 TO 47. NORTHWEST
WINDS 10 TO 15 MPH WITH GUSTS TO 25 MPH IN THE EVENING, SHIFTING
TO EAST AFTER MIDNIGHT.
FRIDAY
SUNNY. HIGHS 77 TO 82. EAST WINDS 10 TO 15 MPH.
FRIDAY NIGHT
CLEAR. LOWS 45 TO 51.
SATURDAY
SUNNY. HIGHS 86 TO 91.
SATURDAY NIGHT
INCREASING CLOUDS. LOWS 52 TO 57.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR. HIGHS 86 TO 92. LOWS
51 TO 57.
MONDAY NIGHT
PARTLY CLOUDY. LOWS 46 TO 51. WINDY.
TUESDAY
PARTLY CLOUDY. A SLIGHT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. CHANCE OF RAIN 20 PERCENT. MUCH COOLER WITH HIGHS
69 TO 74. WINDY.
TEMPERATURE
BOISE 74 47 75
MOUNTAIN HOME 76 45 75
=
IDZ016-210200-
WESTERN MAGIC VALLEY-
1236 PM MDT WED MAY 20 2026
REST OF TODAY
PARTLY SUNNY. HIGHS 69 TO 74. WEST WINDS 10 TO
15 MPH WITH GUSTS TO 25 MPH.
TONIGHT
PARTLY CLOUDY. LOWS 41 TO 46. WEST WINDS 10 TO 15 MPH
WITH GUSTS TO 25 MPH.
THURSDAY
SUNNY. HIGHS 67 TO 73. NORTHWEST WINDS 10 TO 15 MPH
WITH GUSTS TO 25 MPH.
THURSDAY NIGHT
INCREASING CLOUDS. LOWS 41 TO 46. WEST WINDS
10 TO 15 MPH IN THE EVENING, SHIFTING TO SOUTHEAST AFTER
MIDNIGHT. GUSTS TO 25 MPH.
FRIDAY
PARTLY SUNNY IN THE MORNING, THEN CLEARING. HIGHS 73 TO
78. EAST WINDS 10 TO 15 MPH IN THE MORNING, BECOMING LIGHT IN THE
AFTERNOON.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLEAR. LOWS 43 TO 48. HIGHS
82 TO 87.
SATURDAY NIGHT THROUGH MEMORIAL DAY
MOSTLY CLEAR. LOWS 48 TO
55. HIGHS 83 TO 89.
MONDAY NIGHT
PARTLY CLOUDY. LOWS 47 TO 52. BREEZY.
TUESDAY
PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN THE
AFTERNOON. CHANCE OF RAIN 20 PERCENT. MUCH COOLER WITH HIGHS
70 TO 75. WINDY.
TEMPERATURE
JEROME 71 43 69
TWIN FALLS 70 45 68
=
IDZ029-210200-
OWYHEE MOUNTAINS-
1236 PM MDT WED MAY 20 2026
REST OF TODAY
MOSTLY SUNNY. HIGHS 65 TO 70.
TONIGHT
PARTLY CLOUDY. LOWS 38 TO 47.
THURSDAY
SUNNY. HIGHS 64 TO 69. BREEZY.
THURSDAY NIGHT
DECREASING CLOUDS. LOWS 38 TO 48.
FRIDAY
SUNNY. HIGHS 70 TO 75.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLEAR. LOWS 43 TO 53. HIGHS
78 TO 83.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS 49 TO 59.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR. HIGHS 77 TO 83. LOWS
48 TO 58.
MONDAY NIGHT
PARTLY CLOUDY. LOWS 42 TO 49. WINDY.
TUESDAY
A SLIGHT CHANCE OF SNOW SHOWERS IN THE MORNING. PARTLY
CLOUDY WITH A SLIGHT CHANCE OF RAIN SHOWERS. CHANCE OF
PRECIPITATION 20 PERCENT. MUCH COOLER WITH HIGHS 60 TO 65.
BREEZY.
=
IDZ015-210200-
SOUTHWEST HIGHLANDS-
1236 PM MDT WED MAY 20 2026
REST OF TODAY
PARTLY SUNNY. HIGHS 66 TO 72.
TONIGHT
DECREASING CLOUDS. LOWS 39 TO 45.
THURSDAY
SUNNY. HIGHS 64 TO 71. WINDY. NORTH WINDS AROUND
25 MPH IN THE AFTERNOON. GUSTS TO 35 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS 36 TO 42.
FRIDAY
MOSTLY SUNNY. HIGHS 71 TO 78.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLEAR. LOWS 42 TO 47. HIGHS
79 TO 86.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS 46 TO 54.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR. HIGHS 79 TO 88. LOWS
46 TO 53. BREEZY.
MONDAY NIGHT
PARTLY CLOUDY. LOWS 42 TO 47. BREEZY.
TUESDAY
PARTLY CLOUDY. A CHANCE OF RAIN SHOWERS, MAINLY IN THE
AFTERNOON. CHANCE OF RAIN 30 PERCENT. MUCH COOLER WITH HIGHS
64 TO 70. WINDY.
=
IDZ030-210200-
SOUTHERN TWIN FALLS COUNTY-
1236 PM MDT WED MAY 20 2026
REST OF TODAY
PARTLY SUNNY. HIGHS 67 TO 72.
TONIGHT
MOSTLY CLOUDY. LOWS 41 TO 46.
THURSDAY
SUNNY. HIGHS 64 TO 69. BREEZY.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS 38 TO 43.
FRIDAY
PARTLY SUNNY IN THE MORNING, THEN CLEARING. HIGHS 72 TO
77.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLEAR. LOWS 42 TO 47. HIGHS
80 TO 85.
SATURDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN CLEARING.
LOWS 50 TO 55.
SUNDAY
PARTLY CLOUDY. A SLIGHT CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. CHANCE OF RAIN 20 PERCENT. HIGHS
81 TO 86.
SUNDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN CLEARING. LOWS
49 TO 54.
MEMORIAL DAY
SUNNY. HIGHS 83 TO 88. BREEZY.
MONDAY NIGHT
PARTLY CLOUDY. LOWS 46 TO 51. BREEZY.
TUESDAY
PARTLY CLOUDY. A SLIGHT CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. CHANCE OF RAIN 20 PERCENT. MUCH
COOLER WITH HIGHS 68 TO 73. BREEZY.
=
ORZ062-210200-
BAKER COUNTY-
1136 AM PDT WED MAY 20 2026
REST OF TODAY
MOSTLY SUNNY. HIGHS 66 TO 73. NORTHWEST WINDS
10 TO 15 MPH WITH GUSTS TO 25 MPH.
TONIGHT
PARTLY CLOUDY. LOWS 36 TO 45. BREEZY. NORTHWEST WINDS
10 TO 20 MPH. GUSTS TO 40 MPH IN THE EVENING, DECREASING TO
25 MPH AFTER MIDNIGHT.
THURSDAY
SUNNY. HIGHS 67 TO 75. NORTH WINDS 10 TO 15 MPH WITH
GUSTS TO 25 MPH.
THURSDAY NIGHT
DECREASING CLOUDS. LOWS 37 TO 47. NORTHWEST
WINDS 10 TO 15 MPH. GUSTS TO 30 MPH IN THE EVENING.
FRIDAY
SUNNY. HIGHS 72 TO 79. LIGHT WINDS.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLEAR. LOWS 41 TO 51. HIGHS
79 TO 86.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS 45 TO 55.
SUNDAY
SUNNY. HIGHS 78 TO 87.
SUNDAY NIGHT AND MEMORIAL DAY
PARTLY CLOUDY. LOWS 45 TO 55.
HIGHS 73 TO 82. BREEZY.
MONDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF RAIN SHOWERS, MAINLY
AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. CHANCE OF RAIN
30 PERCENT. LOWS 36 TO 46. WINDY.
TUESDAY
A CHANCE OF SNOW SHOWERS IN THE MORNING. PATCHY FOG IN
THE MORNING. PARTLY CLOUDY WITH A CHANCE OF RAIN SHOWERS. CHANCE
OF PRECIPITATION 30 PERCENT. MUCH COOLER WITH HIGHS 57 TO 66.
BREEZY.
TEMPERATURE
BAKER CITY 69 37 71
=
ORZ061-210200-
HARNEY COUNTY-
1136 AM PDT WED MAY 20 2026
REST OF TODAY
SUNNY. HIGHS 66 TO 73. NORTHWEST WINDS 10 TO
15 MPH.
TONIGHT
PARTLY CLOUDY. LOWS 36 TO 44. NORTH WINDS 10 TO 15 MPH
WITH GUSTS TO 25 MPH.
THURSDAY
SUNNY. HIGHS 67 TO 73. NORTH WINDS UP TO 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN CLEARING.
LOWS 37 TO 44. NORTH WINDS UP TO 10 MPH WITH GUSTS TO 20 MPH.
FRIDAY
SUNNY. HIGHS 71 TO 78. LIGHT WINDS.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLEAR. LOWS 40 TO 49. HIGHS
75 TO 84.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS 44 TO 51.
SUNDAY AND SUNDAY NIGHT
MOSTLY CLEAR. HIGHS 77 TO 84. LOWS
43 TO 51.
MEMORIAL DAY
MOSTLY SUNNY. HIGHS 73 TO 81. BREEZY.
MONDAY NIGHT
PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF RAIN
SHOWERS. LOWS 34 TO 42. WINDY.
TUESDAY
PARTLY CLOUDY. A CHANCE OF RAIN AND SNOW SHOWERS,
MAINLY IN THE MORNING. CHANCE OF PRECIPITATION 30 PERCENT. MUCH
COOLER WITH HIGHS 56 TO 62. BREEZY.
TEMPERATURE
BURNS 73 37 73
=
ORZ063-210200-
MALHEUR COUNTY-
1236 PM MDT WED MAY 20 2026 /1136 AM PDT WED MAY 20 2026/
REST OF TODAY
MOSTLY SUNNY. HIGHS 69 TO 75. NORTHWEST WINDS
10 TO 15 MPH.
TONIGHT
PARTLY CLOUDY. LOWS 39 TO 49. BREEZY. NORTH WINDS
10 TO 20 MPH WITH GUSTS TO 30 MPH.
THURSDAY
SUNNY. HIGHS 68 TO 76. NORTH WINDS 10 TO 15 MPH.
THURSDAY NIGHT
DECREASING CLOUDS. LOWS 38 TO 48. NORTH WINDS
UP TO 10 MPH WITH GUSTS TO 20 MPH.
FRIDAY
SUNNY. HIGHS 74 TO 80. NORTHEAST WINDS UP TO 10 MPH.
FRIDAY NIGHT AND SATURDAY
MOSTLY CLEAR. LOWS 42 TO 52. HIGHS
81 TO 88.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS 48 TO 57.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR. HIGHS 78 TO 88. LOWS
47 TO 56. BREEZY.
MONDAY NIGHT
PARTLY CLOUDY. A SLIGHT CHANCE OF RAIN SHOWERS
AFTER MIDNIGHT. CHANCE OF RAIN 20 PERCENT. LOWS 40 TO 49. WINDY.
TUESDAY
PARTLY CLOUDY. A CHANCE OF RAIN SHOWERS, MAINLY IN THE
MORNING. CHANCE OF RAIN 30 PERCENT. MUCH COOLER WITH HIGHS 62 TO
68. BREEZY.
=
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