JANESVILLE, WI 53546 Weather Forecast & Current Conditions

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JANESVILLE, WI
Current Weather

12:10 AM CDT JUN 30, 2026
Clear
81°F
Feels Like: 87°F
Dewpoint: 75°F
Rel. Hum.: 82%
Visibility: 10 miles
Wind: SSW at 10 mph
Pressure: 29.88 inches
Last 72 hours

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JANESVILLE, WI 53546
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Partly cloudy. Lows in the upper 70s. South winds 10 to 15 mph. Highest heat index readings 97 to 102 in the evening.
TUESDAY
Hot and humid. Mostly sunny. Highs in the lower 90s. Southwest winds 10 to 20 mph. Highest heat index readings 101 to 106 in the late morning and afternoon.
TUESDAY NIGHT
Partly cloudy. Lows in the mid 70s. Southwest winds 5 to 15 mph. Highest heat index readings 97 to 102 in the evening.
WEDNESDAY
Hot and humid. Sunny. Highs in the lower 90s. Southwest winds 10 to 15 mph. Highest heat index readings 100 to 105 in the late morning and afternoon.
WEDNESDAY NIGHT
Mostly clear. A 20 percent chance of light showers and thunderstorms after midnight. Lows in the mid 70s. Southwest winds 10 to 15 mph. Highest heat index readings 95 to 100 in the evening.
THURSDAY
Mostly sunny. Slight chance of light showers in the morning, then chance of light showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of precipitation 40 percent.
THURSDAY NIGHT
Partly cloudy. Chance of light showers and thunderstorms through around midnight, then light showers likely and chance of thunderstorms after midnight. Lows in the lower 70s. Chance of precipitation 60 percent.
FRIDAY
Partly sunny. Chance of light showers and thunderstorms in the morning, then light showers likely and chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of precipitation 60 percent.
FRIDAY NIGHT
Partly cloudy with a 40 percent chance of light showers and thunderstorms. Lows around 70.
INDEPENDENCE DAY
Partly sunny with chance of light showers and slight chance of thunderstorms. Highs in the upper 80s. Chance of precipitation 50 percent.
SATURDAY NIGHT
Partly cloudy. Chance of showers and thunderstorms through around midnight, then chance of light showers after midnight. Lows in the upper 60s. Chance of precipitation 50 percent.
SUNDAY
Partly sunny with a 50 percent chance of showers and thunderstorms. Highs in the mid 80s.
SUNDAY NIGHT
Partly cloudy. Chance of light showers and thunderstorms through around midnight, then slight chance of light showers after midnight. Lows in the mid 60s. Chance of precipitation 50 percent.

Visible Weather Satellite
JANESVILLE, WI 53546
Infrared Weather Satellite
JANESVILLE, WI 53546
NEXRAD Weather Radar
JANESVILLE, WI 53546

JANESVILLE, WI 3 hourly weather forecast

weather forecast created  7:00 PM CDT  6/29/2026
Tuesday
30 JUN 2026
JANESVILLE, WI 53546 weather forecast Day 1, 0 hours 1 AM 80° 84° Partly Cloudy 16%
RAIN
.1–.25 in
0% Thunder
( 12% severe)
S   12 77% 72°
Low 76° JANESVILLE, WI 53546 weather forecast Day 1, 3 hours 4 AM 77° 79° Partly Cloudy SSW   12 82% 71°
High 93° JANESVILLE, WI 53546 weather forecast Day 1, 6 hours 7 AM 78° 80° Partly Cloudy 6%

0% Thunder
( 9% severe)
SSW   12 85% 73°

Partly Cloudy



JANESVILLE, WI 53546 weather forecast Day 1, 9 hours 10 AM 84° 91° Mostly Cloudy SW   15 72% 74°
JANESVILLE, WI 53546 weather forecast Day 1, 12 hours 1 PM 90° 101° Partly Cloudy 2%

0% Thunder
( 9% severe)
SW   16 62% 75°
JANESVILLE, WI 53546 weather forecast Day 1, 15 hours 4 PM 93° 105° Partly Cloudy SSW   17 56% 75°
JANESVILLE, WI 53546 weather forecast Day 1, 18 hours 7 PM 91° 101° Partly Cloudy 9%

0% Thunder
( 29% severe)
SW   15 58% 74°
JANESVILLE, WI 53546 weather forecast Day 1, 21 hours 10 PM 84° 90° Partly Cloudy SSW   12 67% 72°
Wednesday
1 JUL 2026
JANESVILLE, WI 53546 weather forecast Day 2, 0 hours 1 AM 81° 84° Partly Cloudy 5%

0% Thunder
( 19% severe)
SW   12 69% 70°
Low 75° JANESVILLE, WI 53546 weather forecast Day 2, 3 hours 4 AM 77° 79° Partly Cloudy SW   10 74% 68°
High 93° JANESVILLE, WI 53546 weather forecast Day 2, 6 hours 7 AM 77° 79° Partly Cloudy 1%

0% Thunder
( 7% severe)
SW   9 79% 70°

Partly Cloudy



JANESVILLE, WI 53546 weather forecast Day 2, 9 hours 10 AM 84° 90° Partly Cloudy SW   13 67% 72°
JANESVILLE, WI 53546 weather forecast Day 2, 12 hours 1 PM 90° 98° Partly Cloudy 1%

0% Thunder
( 13% severe)
SSW   15 56% 72°
JANESVILLE, WI 53546 weather forecast Day 2, 15 hours 4 PM 92° 99° Clear SSW   16 51% 71°
JANESVILLE, WI 53546 weather forecast Day 2, 18 hours 7 PM 90° 96° Clear 2%

0% Thunder
( 19% severe)
SSW   15 54% 71°
JANESVILLE, WI 53546 weather forecast Day 2, 21 hours 10 PM 83° 87° Partly Cloudy SSW   13 63% 69°

JANESVILLE, WI extended weather forecast

BAD DAY
BAD DATE
BAD DAY
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Low 75° Low 76° Low 72° Low 71° Low 69°
High 98° High 94° High 93° High 88° High 89°
JANESVILLE, WI 53546 weather forecast Day 3 JANESVILLE, WI 53546 weather forecast Day 4 JANESVILLE, WI 53546 weather forecast Day 5 JANESVILLE, WI 53546 weather forecast Day 6 JANESVILLE, WI 53546 weather forecast Day 7
Partly Cloudy
14% Rain
Partly Cloudy
39% Rain
Partly Cloudy
38% Rain
Partly Cloudy
60% Rain
Mostly Cloudy
48% Rain
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