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Cass County, IA Weather Forecast
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Cass County Weather Forecast
| REST OF TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 | |  |  |  | |  |  | |  |  | |
| Chance of Showers | Chance of Showers | Mostly Cloudy | Partly Cloudy | Mostly Sunny | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers |
| Hi: 59°FHi: 15°C | Lo: 59°FLo: 15°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C | Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Lo: 60°FLo: 16°C |
| POP: 50% | POP: 40% | POP: 50% | POP: 50% | POP: 50% | POP: 50% | POP: 50% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 854 AM CDT Mon Sep 21 2026 
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Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 603 AM CDT Mon Sep 21 2026
Key Messages
- Light drizzle and showers are possible through late Monday night. A rumble or two of thunder is possible with stronger showers. Heavy rain concerns are minimal.
- Patchy fog is possible in spots through sunrise.
- Cool, dry weather expected for the midweek. Next chances of rain creep into the west late in the period.
Aviation
/06Z TAFS THROUGH 06Z TUESDAY/... Issued at 558 AM CDT Mon Sep 21 2026
LIFR to MVFR conditions are expected through this TAF period. Southern terminals (KDSM and KOTM)...