Johnstown, Wisconsin Weather
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Weather Forecast for Johnstown, Wisconsin : Rock County
Issued: 6:38 pm CDT May 11, 2025 Latitude: 42.7000119 Longitude: -88.8062182 View on Google Maps

MouseOver for Detail Forecast
Tonight Monday Tuesday Wednesday Thursday Friday Saturday Sunday
Mostly Clear on Tonight Sunny on Monday 40% chance of thunderstorms on Tuesday 30% chance of thunderstorms on Wednesday 40% chance of thunderstorms on Thursday 20% chance of thunderstorms on Friday Mostly Sunny on Saturday Mostly Sunny on Sunday
Low: 48°F High: 79°F High: 75°F High: 79°F High: 85°F High: 73°F High: 65°F High: 64°F
Low: 59°F Low: 57°F Low: 60°F Low: 58°F Low: 51°F Low: 44°F  
Mostly Clear Sunny Thunderstorms Thunderstorms Thunderstorms Thunderstorms Mostly Sunny Mostly Sunny
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Current Conditions at
JANESVILLE - (KJVL)
73°
Partly Cloudy
as of 6:45 PM CDST
Rel. Humidity: 25%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: VFR
Wind Data
12 MPH
Gust: 17 MPH
130° Southeast
Cloud Level(s): Scattered at 25000ft
Current Conditions at
BURLINGTON MUNICIPAL AIR - (KBUU)
63°
Clear
as of 7:35 PM CDST
Rel. Humidity: 42%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: VFR
Wind Data
5 MPH
100° East
Cloud Level(s): Clear
Current Conditions at
WATERTOWN - (KRYV)
66°
Clear
as of 7:35 PM CDST
Rel. Humidity: 32%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.17 in.
Flight Rule: VFR
Wind Data
6 MPH
110° East
Cloud Level(s): Clear
Current Conditions at
WAUKESHA - (KUES)
66°
Clear
as of 6:45 PM CDST
Rel. Humidity: 32%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.20 in.
Flight Rule: VFR
Wind Data
8 MPH
110° East
Cloud Level(s): Clear
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 48. Southeast wind 5 to 10 mph.
Sunny on Monday Monday... Sunny, with a high near 79. Southeast wind 5 to 10 mph.
Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 59. East wind 5 to 10 mph.
40% chance of thunderstorms Tuesday Tuesday... A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. East wind 5 to 10 mph. Chance of precipitation is 40%.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 57. East wind around 5 mph becoming calm after midnight.
30% chance of thunderstorms Wednesday Wednesday... A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79. Light east wind becoming southeast 5 to 10 mph in the morning. Chance of precipitation is 30%.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 60. Southeast wind 5 to 10 mph.
40% chance of thunderstorms Thursday Thursday... A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
40% chance of thunderstorms Thursday Night Thursday Night... A 40 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 58.
20% chance of thunderstorms Friday Friday... A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 73. Breezy.
20% chance of thunderstorms Friday Night Friday Night... A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 51.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 65.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 44.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 64.
Current Radar Image


Sun Almanac for Johnstown, Wisconsin
Sunrise: 05:36 AM
Sunset: 8:07 PM
Civil Sunrise:05:04 AM
Civil Sunset: 8:39 PM
Nautical Sunrise: 04:24 AM
Nautical Sunset: 9:19 PM
Astro Sunrise: 03:39 AM
Astro Sunset: 10:04 PM
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