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Grinnell, KS Weather Forecast
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Grinnell Weather Forecast
| REST OF TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
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| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Clearing | Mostly Clear | Mostly Sunny | Clear | Sunny | Clear | Sunny |
| Lo: 60°FLo: 16°C | Hi: 70°FHi: 21°C | Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 71°FHi: 22°C | Lo: 50°FLo: 10°C | Hi: 75°FHi: 24°C |
| POP: 50% | POP: 100% | POP: 70% | POP: 90% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1152 PM CDT Tue Sep 29 2026 
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Issued: 1220 AM MDT Wed Sep 30 2026
Key Messages
- Dense fog will impact areas of northwest Kansas and southwest Nebraska through about mid morning.
- The Flood Watch continues through the day today. Heaviest rainfall amounts today will generally be south of Interstate 70 in Kansas and east of Highway 25 in Kansas and Nebraska. Flash flooding will be possible in those areas with 3-hour rainfall amounts of 1-3" possible through early this evening.
- There is a marginal risk for severe thunderstorms Wednesday afternoon and early evening. W...