7-Day Forecast Summary
7-Day Detailed Weather Forecast for Helena
Overnight |
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Temperature: 76°F Wind Speed: 5 mph Wind Direction: W Forecast: Mostly clear, with a low around 76. West wind around 5 mph. |
Wednesday |
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Temperature: 94°F Wind Speed: 0 to 10 mph Wind Direction: W Forecast: A slight chance of showers and thunderstorms after 2pm. Mostly sunny. High near 94, with temperatures falling to around 92 in the afternoon. Heat index values as high as 107. West wind 0 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible. |
Wednesday Night |
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Temperature: 77°F Wind Speed: 0 to 10 mph Wind Direction: SW Forecast: Mostly clear, with a low around 77. Southwest wind 0 to 10 mph. New rainfall amounts less than a tenth of an inch possible. |
Thursday |
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Temperature: 92°F Wind Speed: 0 to 10 mph Wind Direction: SW Forecast: A slight chance of showers and thunderstorms between 3pm and 4pm. Sunny, with a high near 92. Heat index values as high as 105. Southwest wind 0 to 10 mph. Chance of precipitation is 20%. |
Thursday Night |
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Temperature: 77°F Wind Speed: 0 to 10 mph Wind Direction: SW Forecast: Partly cloudy, with a low around 77. Southwest wind 0 to 10 mph. |
Friday |
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Temperature: 92°F Wind Speed: 0 to 10 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 92. Southwest wind 0 to 10 mph. Chance of precipitation is 40%. |
Friday Night |
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Temperature: 77°F Wind Speed: 0 to 5 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 77. South wind 0 to 5 mph. Chance of precipitation is 20%. |
Saturday |
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Temperature: 93°F Wind Speed: 0 to 5 mph Wind Direction: W Forecast: A chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 93. West wind 0 to 5 mph. |
Saturday Night |
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Temperature: 76°F Wind Speed: 0 to 5 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 76. Southwest wind 0 to 5 mph. |
Sunday |
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Temperature: 92°F Wind Speed: 0 to 10 mph Wind Direction: W Forecast: Showers and thunderstorms likely. Partly sunny, with a high near 92. West wind 0 to 10 mph. |
Sunday Night |
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Temperature: 75°F Wind Speed: 0 to 5 mph Wind Direction: W Forecast: Showers and thunderstorms likely. Mostly cloudy, with a low around 75. West wind 0 to 5 mph. |
Monday |
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Temperature: 91°F Wind Speed: 5 mph Wind Direction: W Forecast: Showers and thunderstorms. Partly sunny, with a high near 91. West wind around 5 mph. |
Monday Night |
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Temperature: 74°F Wind Speed: 0 to 5 mph Wind Direction: NW Forecast: Showers and thunderstorms before 7pm, then showers and thunderstorms likely between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Northwest wind 0 to 5 mph. |
Tuesday |
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Temperature: 91°F Wind Speed: 5 mph Wind Direction: N Forecast: Showers and thunderstorms likely. Partly sunny, with a high near 91. North wind around 5 mph. |

