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.

Fair

59°F

15°C

Humidity 100%
Wind Speed Calm
Barometer 30.18 in (1021.7 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 31 Aug 2:54 am CDT
Extended Forecast for

Janesville IA

  • Overnight

    Overnight: Partly cloudy, with a low around 57. East wind 3 to 5 mph.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 75. East southeast wind 7 to 9 mph.

    High: 75 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 55. East wind 3 to 6 mph.

    Low: 55 °F

    Mostly Cloudy

  • Labor Day

    Labor Day: Mostly sunny, with a high near 75. East southeast wind 3 to 6 mph.

    High: 75 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 54. Light and variable wind.

    Low: 54 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 77. Chance of precipitation is 20%.

    High: 77 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of thunderstorms before 7pm, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 57. Chance of precipitation is 40%.

    Low: 57 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 67. Breezy.

    High: 67 °F

    Chance
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 57. East wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 75. East southeast wind 7 to 9 mph.
Sunday Night
Mostly cloudy, with a low around 55. East wind 3 to 6 mph.
Labor Day
Mostly sunny, with a high near 75. East southeast wind 3 to 6 mph.
Monday Night
Partly cloudy, with a low around 54. Light and variable wind.
Tuesday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 77. Chance of precipitation is 20%.
Tuesday Night
A slight chance of thunderstorms before 7pm, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 57. Chance of precipitation is 40%.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 67. Breezy.
Wednesday Night
Mostly clear, with a low around 42.
Thursday
Mostly sunny, with a high near 62.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 67.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Janesville IA
 42.64°N 92.46°W
Last Update:
2:50 am CDT Aug 31, 2025
Forecast Valid:
3am CDT Aug 31, 2025-6pm CDT Sep 6, 2025
 
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