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Roy, MT Weather Forecast
Roy, MT Weather Forecast Date: 602 PM MDT Tue Sep 08 2026
The area/counties/county of: Fergus County Below 4500ft, including the cities of: Hilger and Lewistown.or toggle through each period.
Rest of Tonight... Colder. Mostly cloudy early in the evening then clearing. A 20% chance of rain showers in the evening. Lows 44 to 50. West winds 5 to 15 mph with gusts to around 35 mph.
Wednesday... Sunny. Highs in the mid 70s. Southwest winds 5 to 10 mph shifting to the west 10 to 20 mph in the afternoon.
Wednesday Night... Partly cloudy. Lows in the lower 50s. Southwest winds 5 to 10 mph with gusts to around 25 mph.
Thursday... Breezy, sunny. Highs in the mid 80s. Southwest winds 10 to 15 mph shifting to the west 10 to 25 mph in the afternoon.
Thursday Night... Partly cloudy in the evening, then mostly cloudy with a 50% chance of rain showers after midnight. Lows around 50. West winds 5 to 15 mph. Gusts up to 30 mph in the evening.
Friday... Much cooler. Mostly cloudy. Rain showers likely in the morning, then chance of rain showers and slight chance of thunderstorms in the afternoon. Highs in the lower 60s. Chance of precipitation 70%.
Friday Night... Mostly cloudy. A 20% chance of rain showers in the evening. Lows in the lower 40s.
Saturday... Mostly cloudy. Highs in the upper 50s.
Saturday Night... Mostly cloudy. Slight chance of rain showers in the evening, then chance of rain showers after midnight. Lows around 40. Chance of showers 50%.
Sunday... Mostly cloudy with rain showers likely. Highs in the mid 50s. Lows in the upper 30s. Chance of showers 60%.
Sunday Night... Mostly cloudy with rain showers likely. Highs in the mid 50s. Lows in the upper 30s. Chance of showers 60%.
Monday... Partly sunny in the morning then clearing. Highs in the mid 60s.
Monday Night... Mostly clear. A 20% chance of rain showers after midnight. Lows in the lower 40s.
POP = Probability of Precipitation
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