Lyon County, IA Weather Forecast
County weather hub
Mostly Clear
Compare major city weather across Lyon County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly clear, with a low around 27. Northwest wind around 15 mph, with gusts as high as 25 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
- Apr 18 to Apr 24, 2026
- Latest sync
- Apr 18, 2026 2:47 AM CDT
- Forecast office
- FSD
- Source
- NOAA / NWS
Daily Outlook
This Week in Lyon County
Wednesday looks like the warmest upcoming period in Lyon County at 83 degrees F.
Overnight is the coolest period ahead with temperatures near 27 degrees F.
The strongest winds are forecast for Wednesday at about 10 to 25 mph SSE.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 18, 2026 2:47 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
Sunny, with a high near 50. West northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Partly cloudy, with a low around 30. West northwest wind 5 to 20 mph, with gusts as high as 30 mph.
Sunny, with a high near 54. Northwest wind 5 to 10 mph.
Mostly clear, with a low around 30. East northeast wind 5 to 10 mph.
Sunny, with a high near 71. South southeast wind 10 to 20 mph.
Partly cloudy, with a low around 46.
Sunny, with a high near 77.
Mostly clear, with a low around 49.
Sunny, with a high near 83.
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 44. Chance of precipitation is 50%.
A chance of rain showers. Partly sunny, with a high near 61. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 18
|
Mostly Clear
|
27°F |
15 mph
NW
|
|
Saturday
Apr 18
|
Sunny
|
50°F |
15 to 20 mph
WNW
|
|
Saturday Night
Apr 18
|
Partly Cloudy
|
30°F |
5 to 20 mph
WNW
|
|
Sunday
Apr 19
|
Sunny
|
54°F |
5 to 10 mph
NW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
30°F |
5 to 10 mph
ENE
|
|
Monday
Apr 20
|
Sunny
|
71°F |
10 to 20 mph
SSE
|
|
Monday Night
Apr 20
|
Partly Cloudy
|
46°F |
10 to 15 mph
SSW
|
|
Tuesday
Apr 21
|
Sunny
|
77°F |
10 mph
NNE
|
|
Tuesday Night
Apr 21
|
Mostly Clear
|
49°F |
10 mph
ESE
|
|
Wednesday
Apr 22
|
Sunny
|
83°F |
10 to 25 mph
SSE
|
|
Wednesday Night
Apr 22
|
Slight Chance Showers And Thunderstorms
|
60°F |
20 mph
SSE
|
|
Thursday
Apr 23
|
Chance Showers And Thunderstorms
|
79°F |
20 to 25 mph
S
|
|
Thursday Night
Apr 23
|
Chance Showers And Thunderstorms
|
44°F |
15 to 20 mph
WSW
|
|
Friday
Apr 24
|
Chance Rain Showers
|
61°F |
15 to 20 mph
NW
|
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.
