O Brien County, IA Weather Forecast
County weather hub
Sunny
Compare major city weather across O'Brien County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 95. South southwest wind 5 to 10 mph.
County Weather Overview
This county weather page brings together forecast coverage for O'Brien County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 3 of 3 mapped cities in O'Brien County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 17 to Jul 21, 2026
- Latest sync
- Jul 15, 2026 3:13 AM CDT
- Forecast office
- FSD
- Source
- NOAA / NWS
Daily Outlook
This Week in O'Brien County
Sunday looks like the warmest upcoming period in O'Brien County at 96 degrees F.
Monday Night is the coolest period ahead with temperatures near 65 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 15, 2026 3:13 AM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- FSD
- Radar station
- KFSD
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 71.
Sunny, with a high near 94.
Mostly clear, with a low around 69.
Mostly sunny, with a high near 96.
A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 70.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 91.
Partly cloudy, with a low around 65.
Mostly sunny, with a high near 86.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 17
|
Sunny
|
95°F |
5 to 10 mph
SSW
|
|
Friday Night
Jul 17
|
Mostly Clear
|
71°F |
5 to 10 mph
SW
|
|
Saturday
Jul 18
|
Sunny
|
94°F |
5 mph
NNW
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
69°F |
5 to 10 mph
ENE
|
|
Sunday
Jul 19
|
Mostly Sunny
|
96°F |
5 to 10 mph
SSE
|
|
Sunday Night
Jul 19
|
Slight Chance Showers And Thunderstorms
|
70°F |
5 to 10 mph
SSE
|
|
Monday
Jul 20
|
Slight Chance Rain Showers then Mostly Sunny
|
91°F |
5 to 15 mph
NW
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
65°F |
5 to 15 mph
N
|
|
Tuesday
Jul 21
|
Mostly Sunny
|
86°F |
5 to 15 mph
NNW
|
Major City Forecasts
Live forecast snapshots for major cities across O'Brien County.
Coverage
Forecast coverage currently spans 3 of 3 mapped cities in O'Brien County.
Largest mapped city population in this region: 5,071.
