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

Heavy to Excessive Rainfall in the Central Appalachians; Severe Weather in the Mid-South; Hot Weather in Southern California

Heavy to excessive rainfall may lead to flooding today over southwest Pennsylvania into northern West Virginia, and western Maryland. Severe thunderstorms are possible this afternoon and evening in the Mid-South and across Eastern North Carolina. An extended period of hot weather is forecast for parts of coastal southern California including Los Angeles from today through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Waterloo, Waterloo Municipal Airport (KALO)

Lat: 42.55°NLon: 92.4°WElev: 873ft.

Fog/Mist

48°F

9°C

Humidity 96%
Wind Speed N 8 mph
Barometer 29.74 in (1007.2 mb)
Dewpoint 47°F (8°C)
Visibility 4.00 mi
Wind Chill44°F (7°C)
Last update 21 May 5:54 am CDT
Extended Forecast for

Waterloo IA

  • Today

    Today: A 40 percent chance of showers after 3pm. Cloudy, with a steady temperature around 50. Northwest wind 8 to 13 mph, with gusts as high as 21 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 50 °F

    Chance
    Showers

  • Tonight

    Tonight: A 30 percent chance of showers, mainly between 11pm and midnight. Mostly cloudy, with a low around 45. Northwest wind 8 to 10 mph, with gusts as high as 18 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 64. North northwest wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 64 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 43. North northwest wind 5 to 10 mph becoming light west northwest after midnight.

    Low: 43 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 68. North northwest wind 3 to 6 mph.

    High: 68 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers. Mostly cloudy, with a high near 63.

    High: 63 °F

    Chance
    Showers

Detailed Forecast

Today
A 40 percent chance of showers after 3pm. Cloudy, with a steady temperature around 50. Northwest wind 8 to 13 mph, with gusts as high as 21 mph. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A 30 percent chance of showers, mainly between 11pm and midnight. Mostly cloudy, with a low around 45. Northwest wind 8 to 10 mph, with gusts as high as 18 mph. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Partly sunny, with a high near 64. North northwest wind 9 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 43. North northwest wind 5 to 10 mph becoming light west northwest after midnight.
Friday
Mostly sunny, with a high near 68. North northwest wind 3 to 6 mph.
Friday Night
Mostly cloudy, with a low around 47.
Saturday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 66.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 49.
Sunday
A 30 percent chance of showers. Mostly cloudy, with a high near 63.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 46.
Memorial Day
A 30 percent chance of showers. Partly sunny, with a high near 66.
Monday Night
Partly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waterloo IA
 42.49°N 92.35°W
Last Update:
5:49 am CDT May 21, 2025
Forecast Valid:
6am CDT May 21, 2025-6pm CDT May 27, 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