Weather World
Duncan, IA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Duncan Weather Forecast
| REST OF TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  | |  | | | | | | |
| Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Mostly Cloudy | Partly Cloudy | Showers Likely | Chance of T-Storm | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Lo: 50°FLo: 10°C | Hi: 70°FHi: 21°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C |
| POP: 90% | POP: 100% | POP: 70% | POP: 70% | POP: 20% | POP: 60% | POP: 80% | POP: 80% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 128 AM CDT Mon Sep 14 2026 
Duncan Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Duncan Weather Map
Duncan Quick Facts
Duncan Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 430 AM CDT Mon Sep 14 2026
Key Messages
- Thunderstorms with pockets of heavy rainfall will move through the are this morning.
- Severe thunderstorms and excessive rainfall are possible this afternoon and into the overnight hours. Heavy rainfall and training storms may result in flash flooding, particularly in cities and towns.
- Heavy rain and storm chances persist through at least the middle of the week, leading to both river flooding and flash flooding concerns.
Aviation
/06Z TAFS THROUGH 06Z TUESDAY/... Issued at 1049 PM CDT S...