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Ismay, MT Weather Forecast
Ismay, MT Weather Forecast Date: 350 AM MDT Fri Sep 18 2026
The area/counties/county of: Custer, including the city of Miles City.or toggle through each period.
Today... Sunny. Patchy fog early in the morning. Highs in the lower 80s. South winds 5 to 10 mph in the morning shifting to the northwest in the afternoon.
Tonight... Increasing clouds. Slight chance of showers and thunderstorms in the evening, then rain showers likely and chance of thunderstorms overnight. Patchy fog after 3 am. Some thunderstorms May produce heavy rainfall late in the evening. Lows in the upper 50s. Northeast winds 5 to 15 mph. Chance of precipitation 60%.
Saturday... Patchy fog early in the morning. Chance of rain showers and slight chance of thunderstorms early in the morning, then rain showers in the late morning and afternoon. Cooler. Highs in the mid 60s. Northeast winds 10 to 20 mph. Chance of precipitation 90%.
Saturday Night... Rain showers. Lows in the lower 50s. East winds 10 to 20 mph. Chance of precipitation 100%.
Sunday... Rain showers. Highs in the mid 60s. East winds 5 to 15 mph. Chance of precipitation 90%.
Sunday Night... Mostly cloudy. A 30% chance of rain showers in the evening. Patchy fog overnight. Lows around 50.
Monday... Partly sunny. Patchy fog early in the morning. Highs in the lower 70s.
Monday Night... Mostly clear. Lows in the lower 50s.
Tuesday... Mostly sunny. Highs in the upper 70s.
Tuesday Night... Mostly clear. Lows in the lower 50s.
Wednesday... Sunny. Highs in the upper 70s.
Wednesday Night... Mostly clear. Lows in the lower 50s.
POP = Probability of Precipitation
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