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Lyons, SD Weather Forecast
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Lyons Weather Forecast
| THIS AFTERNOON | TONIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  |  | |  |  |  | | | | | |
| Thunderstorms | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear |
| Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°C |
| POP: 90% | POP: 50% | POP: 20% | POP: 70% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 134 PM CDT Sun Sep 06 2026 
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Issued: 1249 PM CDT Sun Sep 6 2026
Key Messages
- Isolated strong to severe storms remain possible into the late afternoon hours. Brief downburst winds of 50 to 60 mph will be possible over NW Iowa and adjacent SD/NE counties.
- Heavy rain will be the primary risk into the evening with rainfall rates of 1-3" per hour and local totals of 3-5" possible. A flood watch for flash flooding continues into late evening.
- Isolated strong to severe storms will again be possible late Monday afternoon into Tuesday morning. These risks may continue...