Lyon County, IA Weather Forecast
County weather hub
Sunny
Compare major city weather across Lyon County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 94. South southwest wind 5 to 10 mph.
County Weather Overview
This county weather page brings together forecast coverage for Lyon County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 2 of 2 mapped cities in Lyon County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 17 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 10:20 AM CDT
- Forecast office
- FSD
- Source
- NOAA / NWS
Daily Outlook
This Week in Lyon County
Monday looks like the warmest upcoming period in Lyon County at 99 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 59 degrees F.
The strongest winds are forecast for Sunday Night at about 10 to 15 mph S.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 10:20 AM CDT
- Coverage
- 7 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 69. West southwest wind 5 to 10 mph.
Sunny, with a high near 89. Northeast wind around 10 mph.
Mostly clear, with a low around 65. East wind 5 to 10 mph.
Mostly sunny, with a high near 95. South southeast wind 5 to 10 mph.
Partly cloudy, with a low around 75. South wind 10 to 15 mph.
Mostly sunny, with a high near 99.
Mostly clear, with a low around 67.
Mostly sunny, with a high near 85.
Mostly clear, with a low around 59.
Mostly sunny, with a high near 82.
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 61. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 83. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Jul 17
|
Sunny
|
94°F |
5 to 10 mph
SSW
|
|
Tonight
Jul 17
|
Mostly Clear
|
69°F |
5 to 10 mph
WSW
|
|
Saturday
Jul 18
|
Sunny
|
89°F |
10 mph
NE
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
65°F |
5 to 10 mph
E
|
|
Sunday
Jul 19
|
Mostly Sunny
|
95°F |
5 to 10 mph
SSE
|
|
Sunday Night
Jul 19
|
Partly Cloudy
|
75°F |
10 to 15 mph
S
|
|
Monday
Jul 20
|
Mostly Sunny
|
99°F |
10 mph
W
|
|
Monday Night
Jul 20
|
Mostly Clear
|
67°F |
10 mph
N
|
|
Tuesday
Jul 21
|
Mostly Sunny
|
85°F |
10 to 15 mph
NNW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
59°F |
0 to 15 mph
NNE
|
|
Wednesday
Jul 22
|
Mostly Sunny
|
82°F |
0 to 5 mph
SSE
|
|
Wednesday Night
Jul 22
|
Chance Showers And Thunderstorms
|
61°F |
5 mph
SSE
|
|
Thursday
Jul 23
|
Chance Showers And Thunderstorms
|
83°F |
5 to 10 mph
S
|
|
Thursday Night
Jul 23
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
63°F |
5 to 10 mph
S
|
Major City Forecasts
Live forecast snapshots for major cities across Lyon County.
Coverage
Forecast coverage currently spans 2 of 2 mapped cities in Lyon County.
Largest mapped city population in this region: 2,518.
