South Byron, WI Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for South Byron, WI.

Current Conditions — South Byron, WI

OSHKOSH (KOSH)

Rain and Fog/Mist

51.8 F
Humidity:94%
Wind Speed: G 34.5 mph
Barometer: in
Dewpoint:50.0 F
Visibility:2.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 27 2026, 01:20 PM CDT
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5-Day Forecast — South Byron, WI

Monday

High 60 °F
T-storms
Monday
Night
Low 46 °F
T-storms Likely
Tuesday

High 59 °F
Overcast
Tuesday
Night
Low 42 °F
Mostly Cloudy
Wednesday

High 57 °F
Mostly Cloudy
Wednesday
Night
Low 37 °F
Partly Cloudy
Thursday

High 55 °F
Slight Chance of Rain Showers
Thursday
Night
Low 35 °F
Mostly Cloudy
Friday

High 53 °F
Partly Sunny

Detailed Forecast — South Byron, WI

Monday
Thunderstorms. High near 60°F. Wind 17 to 23 mph, with gusts as high as 33 mph.
Monday Night
Thunderstorms Likely. Low around 46°F. Wind 15 to 20 mph, with gusts as high as 30 mph.
Tuesday
Overcast. High near 59°F. Wind 8 to 20 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly Cloudy. Low around 42°F. Wind 6 to 7 mph, with gusts as high as 13 mph.
Wednesday
Mostly Cloudy. High near 57°F. Wind 8 to 12 mph, with gusts as high as 17 mph.
Wednesday Night
Partly Cloudy. Low around 37°F. Wind around 6 mph, with gusts as high as 9 mph.
Thursday
Slight Chance of Rain Showers. High near 55°F. Wind 7 to 10 mph, with gusts as high as 16 mph.
Thursday Night
Mostly Cloudy. Low around 35°F. Wind around 3 mph, with gusts as high as 8 mph.
Friday
Partly Sunny. High near 53°F. Wind 6 to 10 mph, with gusts as high as 15 mph.
Friday Night
Partly Cloudy. Low around 33°F. Wind around 3 mph, with gusts as high as 7 mph.
Saturday
Mostly Sunny. High near 59°F. Wind 5 to 9 mph, with gusts as high as 15 mph.
Saturday Night
Mostly Clear. Low around 39°F. Wind around 6 mph, with gusts as high as 10 mph.
Sunday
Partly Sunny. High near 66°F. Wind 7 to 10 mph, with gusts as high as 15 mph.
WI Radar
Current Radar • WI
Day 1 Outlook • April 27, 2026

Observation History — South Byron, WI

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
01:20 PM CDT G 34.5 2.00 Rain and Fog/Mist -- 51.8 50.0 94% NA NA M
01:10 PM CDT SE 19.6 G 27.6 2.00 Rain and Fog/Mist -- 51.8 50.0 94% NA NA M
01:05 PM CDT SE 19.6 3.00 Rain and Fog/Mist -- 51.8 48.2 87% NA NA M
01:00 PM CDT 17.3 G 24.2 6.00 Light Rain and Fog/Mist -- 51.8 50.0 94% NA NA M
12:40 PM CDT 16.1 3.00 Light Rain and Fog/Mist -- 51.8 50.0 94% NA NA M
12:35 PM CDT 12.7 3.00 Light Rain and Fog/Mist -- 51.8 50.0 94% NA NA M
12:30 PM CDT SE 18.4 G 27.6 3.00 Rain and Fog/Mist -- 51.8 48.2 87% NA NA M
12:20 PM CDT SE 16.1 3.00 Rain and Fog/Mist -- 51.8 48.2 87% NA NA M
12:15 PM CDT SE 18.4 3.00 Light Rain and Fog/Mist -- 51.8 48.2 87% NA NA 29.73 1006.8
12:10 PM CDT SE 17.3 3.00 Light Rain and Fog/Mist -- 51.8 48.2 87% NA NA 29.73 1006.8
12:05 PM CDT SE 15.0 3.00 Light Rain and Fog/Mist -- 51.8 48.2 87% NA NA 29.74 1007.1
12:00 PM CDT SE 18.4 G 24.2 2.50 Light Rain and Fog/Mist -- 51.8 48.2 87% NA NA 29.74 1007.1
11:45 AM CDT SE 17.3 5.00 Light Rain and Fog/Mist -- 51.8 48.2 87% NA NA 29.75 1007.5
11:40 AM CDT SE 17.3 6.00 Light Rain and Fog/Mist -- 51.8 48.2 87% NA NA 29.75 1007.5
11:35 AM CDT SE 15.0 7.00 Light Rain -- 51.8 48.2 87% NA NA M
11:25 AM CDT 17.3 4.00 Light Rain and Fog/Mist -- 51.8 48.2 87% NA NA M
11:20 AM CDT 17.3 6.00 Light Rain and Fog/Mist -- 51.8 48.2 87% NA NA M
11:15 AM CDT SE 18.4 G 25.3 10.00 Cloudy -- 51.8 46.4 82% NA NA 29.76 1007.8
11:00 AM CDT SE 18.4 G 25.3 10.00 Cloudy -- 51.8 46.4 82% NA NA 29.77 1008.1
10:50 AM CDT G 27.6 10.00 Cloudy -- 51.8 46.4 82% NA NA 29.77 1008.1
10:40 AM CDT SE 17.3 G 24.2 9.00 Light Rain -- 51.8 46.4 82% NA NA 29.78 1008.5
10:35 AM CDT SE 20.7 G 26.5 10.00 Cloudy and Windy -- 53.6 46.4 77% NA NA 29.78 1008.5
10:30 AM CDT SE 18.4 10.00 Cloudy -- 53.6 46.4 77% NA NA 29.79 1008.8
10:25 AM CDT SE 18.4 G 24.2 10.00 Cloudy -- 53.6 46.4 77% NA NA 29.79 1008.8

Regional Weather Observation

OSHKOSH (KOSH)

Rain and Fog/Mist
51.8 F

FOND DU LAC (KFLD)

Rain and Fog/Mist
51.8 F

JUNEAU (KUNU)

Light Rain
51.1 F

WEST BEND (KETB)

Rain
50.0 F

APPLETON/OUTAGAM (KATW)

Light Rain and Fog/Mist
53.6 F

WAUTOMA (KY50)

Light Rain
53.6 F
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