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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Waterloo, Waterloo Municipal Airport (KALO)

Lat: 42.55°NLon: 92.4°WElev: 873ft.

Overcast

73°F

23°C

Humidity 84%
Wind Speed SE 8 mph
Barometer 30.02 in (1016.2 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 18 Sep 6:54 pm CDT
Extended Forecast for

Waverly IA

Flood Watch until September 19, 01:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until September 19, 01:00pm

    NOW until 1:00pm Sat

    Flood Watch

  • Tonight

    Low: 64 °F

    Heavy Rain
    and Patchy
    Fog

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms after 7am. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 77. South southeast wind around 9 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Showers
    Likely and
    Patchy Fog
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Cloudy, with a low around 58. North northeast wind around 11 mph. Chance of precipitation is 40%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 58 °F

    Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 66. Breezy, with an east northeast wind 15 to 17 mph, with gusts as high as 24 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 66 °F

    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 53. East northeast wind around 14 mph, with gusts as high as 20 mph.

    Low: 53 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: A 50 percent chance of showers. Mostly cloudy, with a high near 61. Breezy. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 61 °F

    Chance
    Showers and
    Breezy

  • Monday Night

    Monday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

Detailed Forecast

Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Some of the storms could produce heavy rainfall. Patchy fog after 11pm. Low around 64. East southeast wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Saturday
Showers likely and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms after 7am. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 77. South southeast wind around 9 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms. Cloudy, with a low around 58. North northeast wind around 11 mph. Chance of precipitation is 40%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
A 40 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 66. Breezy, with an east northeast wind 15 to 17 mph, with gusts as high as 24 mph. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 53. East northeast wind around 14 mph, with gusts as high as 20 mph.
Monday
A 50 percent chance of showers. Mostly cloudy, with a high near 61. Breezy. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 48.
Tuesday
Partly sunny, with a high near 60.
Tuesday Night
Partly cloudy, with a low around 45.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Partly cloudy, with a low around 49.
Thursday
Partly sunny, with a high near 67.
Thursday Night
Partly cloudy, with a low around 52.
Friday
Mostly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Waverly IA
 42.73°N 92.49°W
Last Update:
5:36 pm CDT Sep 18, 2026
Forecast Valid:
7pm CDT Sep 18, 2026-6pm CDT Sep 25, 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