Sullivan, Montana Weather
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Weather Forecast for Sullivan, Montana : Glacier County
Issued: 10:08 am MDT May 11, 2025 Latitude: 48.9874862 Longitude: -113.049536 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Monday Tuesday Wednesday Thursday Friday Saturday
50% chance of thunderstorms on This Afternoon 70% chance of thunderstorms on Tonight 40% chance of thunderstorms on Monday 70% chance of rain on Tuesday 20% chance of rain on Wednesday 20% chance of rain on Thursday 10% chance of rain on Friday 20% chance of on Saturday
High: 68°F Low: 44°F High: 59°F High: 53°F High: 60°F High: 51°F High: 57°F High: 57°F
Low: 38°F Low: 36°F Low: 37°F Low: 37°F Low: 38°F  
Thunderstorms Thunderstorms Thunderstorms Rain Rain Rain Rain Partly Sunny
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Current Conditions at
GREAT FALLS - (KGTF)
73°
Clear
as of 1:38 PM MDST
Rel. Humidity: 35%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 29.71 in.
Flight Rule: VFR
Wind Data
17 MPH
Gust: 22 MPH
180° South
Cloud Level(s): Clear
50% chance of thunderstorms This Afternoon This Afternoon... A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 68. Southeast wind around 9 mph becoming west southwest.
70% chance of thunderstorms Tonight Tonight... A chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 44. Northwest wind 5 to 9 mph becoming east in the evening. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
40% chance of thunderstorms Monday Monday... A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 59. West southwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 40%.
30% chance of rain Monday Night Monday Night... A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 38. West southwest wind 10 to 18 mph, with gusts as high as 32 mph.
70% chance of rain Tuesday Tuesday... Showers likely, mainly before noon. Mostly cloudy, with a high near 53. Northwest wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 36. West southwest wind 6 to 10 mph.
20% chance of rain Wednesday Wednesday... A 20 percent chance of showers after noon. Mostly sunny, with a high near 60. West southwest wind 8 to 14 mph, with gusts as high as 23 mph.
20% chance of rain Wednesday Night Wednesday Night... A chance of showers. Mostly cloudy, with a low around 37. West northwest wind 11 to 14 mph, with gusts as high as 22 mph.
20% chance of rain Thursday Thursday... A chance of showers, mainly before noon. Mostly cloudy, with a high near 51.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 37.
10% chance of rain Friday Friday... A slight chance of showers. Mostly cloudy, with a high near 57.
10% chance of rain Friday Night Friday Night... A slight chance of showers. Mostly cloudy, with a low around 38.
20% chance of Saturday Saturday... A chance of showers. Partly sunny, with a high near 57.
Sun Almanac for Sullivan, Montana
Sunrise: 05:54 AM
Sunset: 9:03 PM
Civil Sunrise:05:17 AM
Civil Sunset: 9:40 PM
Nautical Sunrise: 04:28 AM
Nautical Sunset: 10:29 PM
Astro Sunrise: 03:26 AM
Astro Sunset: 11:31 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.