Johnstown, Wisconsin Weather
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Weather Forecast for Johnstown, Wisconsin : Rock County
Issued: 4:24 pm CDT Jul 2, 2025 Latitude: 42.7000119 Longitude: -88.8062182 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Thursday Independence Day Saturday Sunday Monday Tuesday Wednesday
20% chance of thunderstorms on This Afternoon 20% chance of thunderstorms on Tonight 30% chance of thunderstorms on Thursday Mostly Sunny on Independence Day Mostly Sunny on Saturday 40% chance of thunderstorms on Sunday Mostly Sunny on Monday 20% chance of thunderstorms on Tuesday 30% chance of thunderstorms on Wednesday
High: 87°F Low: 64°F High: 87°F High: 89°F High: 90°F High: 83°F High: 79°F High: 81°F High: 83°F
Low: 66°F Low: 70°F Low: 70°F Low: 61°F Low: 58°F Low: 62°F  
Thunderstorms Thunderstorms Thunderstorms Mostly Sunny Mostly Sunny Thunderstorms Mostly Sunny Thunderstorms Thunderstorms
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Current Conditions at
JANESVILLE - (KJVL)
82°
Partly Cloudy
as of 3:45 PM CDST
Rel. Humidity: 51%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 29.96 in.
Flight Rule: VFR
Wind Data
7 MPH
300° Northwest
Cloud Level(s): Scattered at 9000ft
Current Conditions at
BURLINGTON MUNICIPAL AIR - (KBUU)
86°
Mostly Cloudy
as of 4:15 PM CDST
Rel. Humidity: 42%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 29.94 in.
Flight Rule: VFR
Wind Data
7 MPH
220° Southwest
Cloud Level(s): Broken at 6000ft, Broken at 8000ft
Current Conditions at
WATERTOWN - (KRYV)
84°
Partly Cloudy
as of 4:15 PM CDST
Rel. Humidity: 45%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 29.93 in.
Flight Rule: VFR
Wind Data
6 MPH
250° West
Cloud Level(s): Scattered at 6500ft
20% chance of thunderstorms This Afternoon This Afternoon... A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. West wind around 10 mph.
20% chance of thunderstorms Tonight Tonight... A 20 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 64. West wind around 5 mph becoming calm in the evening.
30% chance of thunderstorms Thursday Thursday... A 30 percent chance of showers and thunderstorms, mainly after 4pm. Sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the morning.
30% chance of thunderstorms Thursday Night Thursday Night... A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 66. Southwest wind around 5 mph becoming east in the evening.
Mostly Sunny on Independence Day Independence Day... Mostly sunny, with a high near 89. Southwest wind 5 to 10 mph.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 70. South wind around 5 mph.
Mostly Sunny on Saturday Saturday... Mostly sunny and hot, with a high near 90. Southwest wind 10 to 15 mph.
40% chance of thunderstorms Saturday Night Saturday Night... A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Southwest wind around 10 mph.
40% chance of thunderstorms Sunday Sunday... A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
30% chance of thunderstorms Sunday Night Sunday Night... A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 61. Chance of precipitation is 30%.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 79.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 58.
20% chance of thunderstorms Tuesday Tuesday... A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
30% chance of thunderstorms Tuesday Night Tuesday Night... A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62.
30% chance of thunderstorms Wednesday Wednesday... A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Sun Almanac for Johnstown, Wisconsin
Sunrise: 05:22 AM
Sunset: 8:37 PM
Civil Sunrise:04:47 AM
Civil Sunset: 9:12 PM
Nautical Sunrise: 04:02 AM
Nautical Sunset: 9:57 PM
Astro Sunrise: 03:07 AM
Astro Sunset: 10:51 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.