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

Waterloo, Waterloo Municipal Airport (KALO)

Lat: 42.55°NLon: 92.4°WElev: 873ft.

Fair

43°F

6°C

Humidity 89%
Wind Speed Calm
Barometer 29.84 in (1011.0 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 4 Nov 8:54 pm CST
Extended Forecast for

Janesville IA

  • Tonight

    Tonight: Mostly clear, with a low around 42. Breezy, with a south southwest wind 7 to 12 mph becoming northwest 13 to 18 mph after midnight. Winds could gust as high as 25 mph.

    Low: 42 °F

    Mostly Clear
    then Mostly
    Clear and
    Breezy

  • Wednesday

    Wednesday: Sunny, with a high near 55. Windy, with a northwest wind 16 to 21 mph decreasing to 8 to 13 mph in the afternoon. Winds could gust as high as 36 mph.

    High: 55 °F

    Sunny and
    Windy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 31. West northwest wind around 6 mph becoming calm.

    Low: 31 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 56. Windy, with a south wind 6 to 11 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 56 °F

    Mostly Cloudy
    and Windy

  • Thursday Night

    Thursday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 43. South wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 22 mph.

    Low: 43 °F

    Chance Rain
    then Partly
    Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 59. Breezy.

    High: 59 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Saturday

    Saturday: Rain likely, mainly after noon. Mostly cloudy, with a high near 45. Chance of precipitation is 70%.

    High: 45 °F

    Chance Rain
    then Rain
    Likely

  • Saturday Night

    Saturday Night: A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 42. Breezy, with a south southwest wind 7 to 12 mph becoming northwest 13 to 18 mph after midnight. Winds could gust as high as 25 mph.
Wednesday
Sunny, with a high near 55. Windy, with a northwest wind 16 to 21 mph decreasing to 8 to 13 mph in the afternoon. Winds could gust as high as 36 mph.
Wednesday Night
Partly cloudy, with a low around 31. West northwest wind around 6 mph becoming calm.
Thursday
Mostly cloudy, with a high near 56. Windy, with a south wind 6 to 11 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 29 mph.
Thursday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 43. South wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 22 mph.
Friday
Mostly sunny, with a high near 59. Breezy.
Friday Night
Mostly cloudy, with a low around 32.
Saturday
Rain likely, mainly after noon. Mostly cloudy, with a high near 45. Chance of precipitation is 70%.
Saturday Night
A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 23.
Sunday
Mostly sunny, with a high near 36. Breezy.
Sunday Night
Mostly clear, with a low around 20.
Monday
Mostly sunny, with a high near 38.
Monday Night
Partly cloudy, with a low around 22.
Veterans Day
Partly sunny, with a high near 45.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Janesville IA
 42.64°N 92.46°W
Last Update:
7:56 pm CST Nov 4, 2025
Forecast Valid:
9pm CST Nov 4, 2025-6pm CST Nov 11, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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