668  
FPUS65 KTFX 311000  
SFPMT  
 
STATE FORECAST FOR MONTANA  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
400 AM MDT SUN MAY 31 2026  
 
MTZ001>007-043-312200-  
WEST OF THE CONTINENTAL DIVIDE-  
NATIONAL WEATHER SERVICE MISSOULA MT  
400 AM MDT SUN MAY 31 2026  
   
TODAY  
RAIN LIKELY. HIGHS IN THE 50S TO LOWER 60S.    
TONIGHT  
RAIN LIKELY. PATCHY FOG. LOWS IN THE MID 30S TO LOWER  
40S.    
MONDAY  
RAIN LIKELY IN THE MORNING, THEN CHANCE OF RAIN SHOWERS  
IN THE AFTERNOON AND EVENING. AREAS OF FOG IN THE MORNING. HIGHS  
IN THE MID 50S TO LOWER 60S.    
TUESDAY  
MOSTLY CLOUDY WITH A CHANCE OF RAIN. PATCHY FOG. LOWS  
IN THE MID 30S TO LOWER 40S. HIGHS IN THE 60S.    
WEDNESDAY  
PARTLY CLOUDY. PATCHY FOG. LOWS IN THE MID 30S TO  
LOWER 40S. HIGHS IN THE 70S.    
THURSDAY  
MOSTLY CLOUDY WITH A CHANCE OF RAIN SHOWERS. LOWS IN  
THE 40S. HIGHS IN THE UPPER 60S TO MID 70S.  
 
 
 
MTZ301>314-316>318-312200-  
CENTRAL MONTANA-  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
400 AM MDT SUN MAY 31 2026  
 
...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON FOR  
EAST GLACIER PARK REGION...NORTHERN HIGH PLAINS...EASTERN  
GLACIER, WESTERN TOOLE, AND CENTRAL PONDERA...SOUTHERN ROCKY  
MOUNTAIN FRONT...SOUTHERN HIGH PLAINS...EASTERN PONDERA AND  
EASTERN TETON...CASCADE COUNTY BELOW 5000FT...GATES OF THE  
MOUNTAINS...  
   
TODAY...RAIN. HIGHS 50 TO 60  
40 TO 50 IN THE MOUNTAINS.  
NORTHWEST WINDS 20 TO 30 MPH WITH GUSTS TO 40 MPH.    
TONIGHT  
CLOUDY, RAIN. LOWS 35 TO 40. NORTHWEST WINDS 20 TO  
30 MPH WITH GUSTS TO 40 MPH.    
MONDAY...CLOUDY. RAIN LIKELY. HIGHS 50 TO 60  
45 TO 55 IN THE  
MOUNTAINS. WEST WINDS 20 TO 30 MPH WITH GUSTS TO 35 MPH.    
TUESDAY  
MOSTLY CLOUDY. CHANCE OF RAIN. LOWS 35 TO 40. HIGHS  
55 TO 65.    
WEDNESDAY  
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN. LOWS 40 TO 45.  
HIGHS 60 TO 70.    
THURSDAY  
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS. LOWS 40 TO 45. HIGHS 65 TO 70.  
 
 
MTZ315-319>330-312200-  
SOUTHWEST MONTANA-  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
400 AM MDT SUN MAY 31 2026  
   
TODAY  
RAIN LIKELY AND SLIGHT CHANCE OF SNOW IN THE MORNING,  
THEN CHANCE OF RAIN AND SLIGHT CHANCE OF THUNDERSTORMS IN THE  
AFTERNOON. HIGHS 45 TO 55...40 TO 50 IN THE MOUNTAINS.    
TONIGHT  
MOSTLY CLOUDY. CHANCE OF RAIN THROUGH THE NIGHT. LOWS  
30 TO 40.    
MONDAY  
MOSTLY CLOUDY. CHANCE OF SNOW IN THE MORNING. CHANCE OF  
RAIN THROUGH THE DAY. SLIGHT CHANCE OF THUNDERSTORMS IN THE  
AFTERNOON AND EVENING. HIGHS 55 TO 65...45 TO 55 IN THE  
MOUNTAINS.    
TUESDAY  
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN AND  
THUNDERSTORMS. LOWS 35 TO 40. HIGHS 55 TO 65.    
WEDNESDAY  
PARTLY CLOUDY. LOWS 35 TO 40. HIGHS 65 TO 75.    
THURSDAY  
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.  
LOWS 40 TO 45. HIGHS 60 TO 70.  
 
 
MTZ016>027-059>062-312200-  
NORTHEAST MONTANA-  
NATIONAL WEATHER SERVICE GLASGOW MT  
400 AM MDT SUN MAY 31 2026  
   
REST OF TONIGHT  
RAIN SHOWERS AND A CHANCE OF THUNDERSTORMS.  
HIGHS NEAR 70. LOWS NEAR 50.    
MONDAY  
MOSTLY CLOUDY WITH A CHANCE OF RAIN SHOWERS. HIGHS IN  
THE 60S.    
MONDAY NIGHT  
MOSTLY CLOUDY. A CHANCE OF RAIN SHOWERS IN THE  
EVENING, THEN A CHANCE OF RAIN SHOWERS AND A SLIGHT CHANCE OF  
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE LOWER TO MID 40S.    
TUESDAY  
MOSTLY CLOUDY WITH A CHANCE OF RAIN SHOWERS AND A  
SLIGHT CHANCE OF THUNDERSTORMS. HIGHS IN THE UPPER 60S TO MID  
70S.    
WEDNESDAY  
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS NEAR 70. LOWS IN THE MID TO UPPER 40S.    
THURSDAY  
MOSTLY CLOUDY WITH A CHANCE OF RAIN SHOWERS AND A  
SLIGHT CHANCE OF THUNDERSTORMS. HIGHS IN THE LOWER TO MID 70S.  
LOWS IN THE MID TO UPPER 40S.    
FRIDAY  
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS IN  
THE MID 70S TO LOWER 80S. LOWS NEAR 50.  
 
 
 
MTZ028>042-056>058-063>068-312200-  
SOUTH CENTRAL AND SOUTHEAST MONTANA-  
NATIONAL WEATHER SERVICE BILLINGS MT  
400 AM MDT SUN MAY 31 2026  
   
TODAY  
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS WEST...AND SHOWERS LIKELY AND SLIGHT CHANCE OF  
THUNDERSTORMS EAST. HIGHS IN THE MID 50S TO THE MID 60S.    
TONIGHT  
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS. LOWS IN  
THE UPPER 30S TO THE UPPER 40S.    
MONDAY  
MOSTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE  
OF THUNDERSTORMS. HIGHS IN THE MID 60S TO THE MID 70S.    
MONDAY NIGHT  
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS. LOWS IN THE 40S.    
TUESDAY  
MOSTLY SUNNY. SLIGHT CHANCE OF THUNDERSTORMS. HIGHS IN  
THE UPPER 60S TO THE UPPER 70S.    
TUESDAY NIGHT  
MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS  
WEST...AND CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS  
EAST. LOWS IN THE LOWER 40S TO AROUND 50.    
WEDNESDAY AND WEDNESDAY NIGHT  
PARTLY CLOUDY. SLIGHT CHANCE OF  
THUNDERSTORMS. LOWS IN THE MID 40S TO THE MID 50S. HIGHS AROUND  
70 TO THE UPPER 70S.    
THURSDAY  
PARTLY SUNNY. CHANCE OF THUNDERSTORMS. HIGHS IN THE  
70S.  
 
 
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