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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Newton Municipal Airport - Earl Johnson Field (KTNU)

Lat: 41.67°NLon: 93.02°WElev: 945ft.

Fair

82°F

28°C

Humidity 42%
Wind Speed S 7 mph
Barometer 30.13 in
Dewpoint 57°F (14°C)
Visibility 9.00 mi
Heat Index82°F (28°C)
Last update 28 Aug 1:35 pm CDT
Extended Forecast for

Colfax IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 84. South southwest wind around 6 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 68. South southeast wind 6 to 9 mph.

    Low: 68 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 86. Breezy, with a south wind 9 to 17 mph, with gusts as high as 28 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Chance
    Showers then
    Slight Chance
    T-storms and
    Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 74. South wind 11 to 15 mph, with gusts as high as 25 mph.

    Low: 74 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly sunny, with a high near 92. South southwest wind 11 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 92 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 76.

    Low: 76 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy
    then Chance
    T-storms

  • Tuesday

    Tuesday: Partly sunny, with a high near 93.

    High: 93 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 84. South southwest wind around 6 mph.
Tonight
Increasing clouds, with a low around 68. South southeast wind 6 to 9 mph.
Saturday
A 30 percent chance of showers and thunderstorms, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 86. Breezy, with a south wind 9 to 17 mph, with gusts as high as 28 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Partly cloudy, with a low around 74. South wind 11 to 15 mph, with gusts as high as 25 mph.
Sunday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly sunny, with a high near 92. South southwest wind 11 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 76.
Monday
Mostly sunny, with a high near 93.
Monday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74.
Tuesday
Partly sunny, with a high near 93.
Tuesday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74.
Wednesday
Mostly sunny, with a high near 93.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
Mostly sunny, with a high near 92.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Colfax IA
 41.67°N 93.25°W
Last Update:
1:26 pm CDT Aug 28, 2026
Forecast Valid:
1pm CDT Aug 28, 2026-6pm CDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

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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