Lannon, WI Weather Forecast
Local 7-day forecast
Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Lannon, WI in one place.
Rain showers. Partly sunny, with a high near 52. West wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Lannon, WI 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: Apr 15, 2026 3:48 PM CDT.
The active forecast window currently covers Apr 18 to Apr 21, 2026 for Lannon, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 18 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 3:48 PM CDT
- Forecast office
- MKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Lannon
Tuesday looks like the warmest upcoming period in Lannon at 69 degrees F.
Sunday Night is the coolest period ahead with temperatures near 29 degrees F.
The strongest winds are forecast for Saturday at about 15 to 20 mph W.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 3:48 PM CDT
- Coverage
- 4 days
- Time zone
- America/Chicago
- Forecast office
- MKX
- Radar station
- KMKX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 31. West wind 10 to 15 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 48.
Partly cloudy, with a low around 29.
Sunny, with a high near 55.
Partly cloudy, with a low around 43.
Mostly sunny, with a high near 69.
Partly cloudy, with a low around 44.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 18
|
Rain Showers
|
52°F |
15 to 20 mph
W
|
|
Saturday Night
Apr 18
|
Slight Chance Rain Showers then Partly Cloudy
|
31°F |
10 to 15 mph
W
|
|
Sunday
Apr 19
|
Mostly Sunny
|
48°F |
10 to 15 mph
NW
|
|
Sunday Night
Apr 19
|
Partly Cloudy
|
29°F |
5 to 10 mph
N
|
|
Monday
Apr 20
|
Sunny
|
55°F |
5 to 10 mph
SE
|
|
Monday Night
Apr 20
|
Partly Cloudy
|
43°F |
10 mph
S
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
69°F |
10 to 15 mph
W
|
|
Tuesday Night
Apr 21
|
Partly Cloudy
|
44°F |
5 to 10 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lannon.