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Sun Valley Lake Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
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| Partly Cloudy | Mostly Clear | Mostly Sunny | Clearing | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Chance of Showers |
| Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C | Lo: 75°FLo: 24°C | Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C |
| POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 404 AM EDT Fri Aug 28 2026 
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Issued: 125 PM EDT Fri Aug 28 2026
Key Messages
1) There will be an extended dry stretch with warming temperatures.
Discussion
... KEY MESSAGE 1) Surface high pressure centered over the Great Lakes will move southeast through the weekend. Southerly flow will then become established early next week. Meanwhile, heights will be rising as mid level high pressure slowly translates east. This will result in dry conditions through at least Tuesday. Today is forecast to be the coolest day with temperatures slightly below normal. There will ...