Expires:202607152215;;997004 FPUS55 KTFX 150758 ZFPTFX Zone Forecast Product for Central and Southwest Montana National Weather Service Great Falls MT Issued by National Weather Service Missoula MT 158 AM MDT Wed Jul 15 2026 Spot temperatures and probabilities of measurable precipitation are for today, tonight, and Thursday. MTZ314-152215- Fergus County below 4500ft- Including Hilger and Lewistown 158 AM MDT Wed Jul 15 2026 .TODAY...Not as warm. Patchy fog in the morning. Mostly cloudy with a 50 percent chance of thunderstorms. Highs 75 to 80. Northwest winds up to 10 mph. .TONIGHT...Cooler. Mostly cloudy with a 20 percent chance of thunderstorms in the evening, then mostly clear after midnight. Lows 55 to 65. Southwest winds up to 5 mph. .THURSDAY...Warmer. Sunny in the morning then becoming partly cloudy. Highs 85 to 90. North winds up to 5 mph shifting to the east in the afternoon. .THURSDAY NIGHT...Mostly cloudy with chance of rain showers and slight chance of thunderstorms in the evening, then partly cloudy with slight chance of rain showers after midnight. Lows 60 to 65. East winds up to 10 mph. Chance of precipitation 40 percent. .FRIDAY...Sunny. A 20 percent chance of thunderstorms in the afternoon. Highs 90 to 95. Southeast winds 5 to 15 mph. .FRIDAY NIGHT...Mostly cloudy with a 50 percent chance of thunderstorms. Lows 60 to 65. .SATURDAY...Sunny. Highs 90 to 95. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of thunderstorms. Lows 60 to 70. .SUNDAY AND SUNDAY NIGHT...Mostly clear. Highs 85 to 90. Lows 55 to 65. .MONDAY AND MONDAY NIGHT...Partly cloudy. Highs 85 to 90. Lows 55 to 65. .TUESDAY...Mostly cloudy with a 20 percent chance of rain showers. Highs 80 to 85. && TEMPERATURE / PRECIPITATION Lewistown 77 54 84 / 60 30 30 $$