Marathon, IA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Marathon, IA in one place.
Sunny, with a high near 90. North wind 0 to 5 mph.
Local Weather Overview
This forecast page for Marathon, IA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 14, 2026 7:28 PM CDT.
The active forecast window currently covers Jul 15 to Jul 20, 2026 for Marathon, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 15 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 7:28 PM CDT
- Forecast office
- FSD
- Source
- NOAA / NWS
Daily Outlook
This Week in Marathon
Friday looks like the warmest upcoming period in Marathon at 95 degrees F.
Monday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Monday at about 5 to 15 mph NW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 7:28 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- FSD
- Radar station
- KDMX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 68. South southeast wind 0 to 5 mph.
Sunny, with a high near 91. South wind 0 to 5 mph.
Mostly clear, with a low around 70. South wind around 5 mph.
Sunny, with a high near 95.
Mostly clear, with a low around 72.
Sunny, with a high near 94.
Mostly clear, with a low around 70.
Sunny, with a high near 95.
A slight chance of rain showers after 7pm. Partly cloudy, with a low around 71.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 93.
Partly cloudy, with a low around 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Jul 15
|
Sunny
|
90°F |
0 to 5 mph
N
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
68°F |
0 to 5 mph
SSE
|
|
Thursday
Jul 16
|
Sunny
|
91°F |
0 to 5 mph
S
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
70°F |
5 mph
S
|
|
Friday
Jul 17
|
Sunny
|
95°F |
5 to 10 mph
SSW
|
|
Friday Night
Jul 17
|
Mostly Clear
|
72°F |
5 to 10 mph
SSW
|
|
Saturday
Jul 18
|
Sunny
|
94°F |
5 mph
NNW
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
70°F |
5 mph
E
|
|
Sunday
Jul 19
|
Sunny
|
95°F |
5 to 10 mph
SSE
|
|
Sunday Night
Jul 19
|
Slight Chance Rain Showers
|
71°F |
5 to 10 mph
SSE
|
|
Monday
Jul 20
|
Slight Chance Rain Showers then Mostly Sunny
|
93°F |
5 to 15 mph
NW
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
66°F |
5 to 10 mph
NNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Marathon.