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Lyon County Weather Forecast
| THIS AFTERNOON | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  | | |  | |  |  |  |  |
| Chance of T-Storm | Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 75°FHi: 24°C | Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C | Hi: 71°FHi: 22°C Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C |
| POP: 20% | POP: 40% | POP: 40% | POP: 50% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 127 PM CDT Sun Sep 20 2026 
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Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 212 PM CDT Sun Sep 20 2026
Key Messages
- A few showers are possible across the southern counties of the forecast area this afternoon and Tonight. And a few showers are possible across the northern counties Tonight.
- Expect fall temperatures this afternoon along with cloudy skies. The cooler temperatures will continue into next week with highs in the in the middle 60s to lower 70s.
- Widespread storm chances return by late week accompanied by another cold front.
Discussion
... Issued at 158 PM CDT Sun Sep 20 2026
Early this aftern...