National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Waterloo, Waterloo Municipal Airport (KALO)

Lat: 42.55°NLon: 92.4°WElev: 873ft.

Overcast

69°F

21°C

Humidity 36%
Wind Speed SE 14 mph
Barometer 29.85 in (1010.3 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 14 May 10:54 pm CDT
Extended Forecast for

Janesville IA

  • Tonight

    Tonight: Cloudy early, then gradual clearing, with a low around 54. Breezy, with a south southeast wind 13 to 17 mph, with gusts as high as 25 mph.

    Low: 54 °F

    Gradual
    Clearing and
    Breezy

  • Friday

    Friday: Sunny, with a high near 86. South wind 11 to 14 mph, with gusts as high as 18 mph.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly before 2am. Increasing clouds, with a low around 56. South wind 8 to 13 mph becoming light and variable after midnight. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 84. Light and variable wind becoming east 5 to 9 mph in the morning. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm, then showers and thunderstorms after 7pm. Low around 57. East wind 8 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 57 °F

    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely before 1pm. Partly sunny, with a high near 85. Windy. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    T-storms
    Likely and
    Windy

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64. Windy.

    Low: 64 °F

    Chance
    T-storms and
    Windy

  • Monday

    Monday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 86. Windy. Chance of precipitation is 70%.

    High: 86 °F

    Showers
    Likely and
    Windy

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 1am, then showers likely. Low around 57. Windy. Chance of precipitation is 80%.

    Low: 57 °F

    Showers and
    Windy

Detailed Forecast

Tonight
Cloudy early, then gradual clearing, with a low around 54. Breezy, with a south southeast wind 13 to 17 mph, with gusts as high as 25 mph.
Friday
Sunny, with a high near 86. South wind 11 to 14 mph, with gusts as high as 18 mph.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly before 2am. Increasing clouds, with a low around 56. South wind 8 to 13 mph becoming light and variable after midnight. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 84. Light and variable wind becoming east 5 to 9 mph in the morning. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely and possibly a thunderstorm, then showers and thunderstorms after 7pm. Low around 57. East wind 8 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and thunderstorms likely before 1pm. Partly sunny, with a high near 85. Windy. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64. Windy.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 86. Windy. Chance of precipitation is 70%.
Monday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Low around 57. Windy. Chance of precipitation is 80%.
Tuesday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 75. Windy.
Tuesday Night
Partly cloudy, with a low around 46. Breezy.
Wednesday
Mostly sunny, with a high near 69.
Wednesday Night
Mostly cloudy, with a low around 47.
Thursday
Mostly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Janesville IA
 42.64°N 92.46°W
Last Update:
10:26 pm CDT May 14, 2026
Forecast Valid:
11pm CDT May 14, 2026-6pm CDT May 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation