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Sun Valley Lake, IA Weather Forecast
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Sun Valley Lake Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  | | |  |  | |  | | | | |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Partly Cloudy | Mostly Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy |
| Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C | Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C |
| POP: 20% | POP: 70% | POP: 90% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 353 AM CDT Tue Aug 04 2026 
Sun Valley Lake Radar Loop
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