Weather World
Marathon, IA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Marathon Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  |  | | |  | | |  | |
| Chance of Showers | Chance of T-Storm | Chance of T-Storm | Mostly Cloudy | Partly Cloudy | Chance of T-Storm | Chance of Showers | Chance of Showers | Showers Likely | Chance of T-Storm | Showers | Chance of Showers |
| Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C |
| POP: 20% | POP: 90% | POP: 70% | POP: 70% | POP: 50% | POP: 50% | POP: 60% | POP: 70% | POP: 60% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 734 PM CDT Sun Sep 13 2026 
Marathon Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Marathon Weather Map
Marathon Quick Facts
Marathon Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 954 PM CDT Sun Sep 13 2026
Key Messages
- Showers and thunderstorms develop after 3am Monday morning. A low chance for a marginally severe storm with hail could be possible through 9am as activity moves northeast.
- A very conditional risk for severe storms forms late Monday afternoon along Highway 20. All hazards could be possible, though cloud cover may play a significant role in potential.
- We`ll remain near to slightly below normal for temperatures during the upcoming week.
- Scattered non-severe rain chances will focus in th...