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

Heavy to Excessive Rains in The Four Corners Region and Midwest; Heat Persists in the South-Central U.S.

Repeated rounds of showers and thunderstorms could bring a flash flooding threat across the Four Corners region and from the mid-Mississippi Valley into the lower Great Lakes. Hot temperatures and high humidity will continue to challenge daily records from the Southern Plains to the lower Mississippi Valley. Read More >

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Partly Cloudy

66°F

19°C

Humidity 94%
Wind Speed Vrbl 6 mph
Barometer 30.24 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 16 Sep 2:15 pm CDT
Extended Forecast for

Walnut IA

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Cloudy, with a high near 68. East southeast wind 7 to 9 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 68 °F

    Showers
    Likely

  • Tonight

    Tonight: A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 3am, then a chance of showers and thunderstorms after 3am. Some of the storms could produce heavy rainfall. Patchy fog after 10pm. Otherwise, cloudy, with a low around 65. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 65 °F

    Chance
    Showers and
    Patchy Fog
    then Heavy
    Rain and
    Patchy Fog

  • Thursday

    Thursday: A chance of showers and thunderstorms before 9am, then a slight chance of showers between 9am and 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 74. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Chance
    Showers and
    Patchy Fog
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 3am. Increasing clouds, with a low around 66. East wind 7 to 11 mph, with gusts as high as 17 mph. Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Mostly sunny, with a high near 85. South wind 13 to 16 mph, with gusts as high as 23 mph.

    High: 85 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 67. South wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Showers
    Likely

  • Saturday

    Saturday: A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. West wind 6 to 8 mph becoming north northwest in the afternoon. Chance of precipitation is 20%.

    High: 75 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. North northeast wind around 8 mph.

    Low: 62 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms. Cloudy, with a high near 66. Northeast wind around 8 mph.

    High: 66 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Cloudy, with a high near 68. East southeast wind 7 to 9 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 3am, then a chance of showers and thunderstorms after 3am. Some of the storms could produce heavy rainfall. Patchy fog after 10pm. Otherwise, cloudy, with a low around 65. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
A chance of showers and thunderstorms before 9am, then a slight chance of showers between 9am and 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 74. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 3am. Increasing clouds, with a low around 66. East wind 7 to 11 mph, with gusts as high as 17 mph. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 85. South wind 13 to 16 mph, with gusts as high as 23 mph.
Friday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 67. South wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. West wind 6 to 8 mph becoming north northwest in the afternoon. Chance of precipitation is 20%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. North northeast wind around 8 mph.
Sunday
A chance of showers and thunderstorms. Cloudy, with a high near 66. Northeast wind around 8 mph.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. North northeast wind 3 to 7 mph.
Monday
A chance of showers. Mostly cloudy, with a high near 64. North wind 5 to 8 mph.
Monday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Northeast wind 3 to 6 mph.
Tuesday
Partly sunny, with a high near 66. Light and variable wind becoming southeast around 6 mph in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
Walnut IA
 41.48°N 95.23°W (Elev. 1348 ft)
Last Update:
2:06 pm CDT Sep 16, 2026
Forecast Valid:
2pm CDT Sep 16, 2026-6pm CDT Sep 22, 2026
 
Forecast Discussion
 
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Additional Resources

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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