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

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Fair

52°F

11°C

Humidity 82%
Wind Speed Calm
Barometer 29.65 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 26 Mar 3:55 am CDT
Extended Forecast for

Portsmouth IA

  • Today

    Today: A slight chance of rain between 1pm and 4pm. Mostly cloudy, with a high near 71. Windy, with a south wind 8 to 13 mph becoming north northeast 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 20%.

    High: 71 °F

    Mostly Cloudy
    then Slight
    Chance Rain
    and Windy

  • Tonight

    Tonight: Mostly cloudy, with a low around 30. Windy, with a north northeast wind 20 to 25 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 37 mph.

    Low: 30 °F

    Mostly Cloudy
    and Windy

  • Friday

    Friday: Sunny, with a high near 50. North northwest wind 11 to 17 mph, with gusts as high as 25 mph.

    High: 50 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25. North northwest wind 5 to 10 mph becoming light and variable.

    Low: 25 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 59. Breezy, with a south wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 31 mph.

    High: 59 °F

    Mostly Sunny
    and Breezy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 41. South wind 10 to 13 mph, with gusts as high as 20 mph.

    Low: 41 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 74. South wind 10 to 16 mph, with gusts as high as 24 mph.

    High: 74 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 49. South wind 7 to 10 mph.

    Low: 49 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of rain and thunderstorms after 1pm. Partly sunny, with a high near 78. Southeast wind 7 to 15 mph, with gusts as high as 21 mph.

    High: 78 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
A slight chance of rain between 1pm and 4pm. Mostly cloudy, with a high near 71. Windy, with a south wind 8 to 13 mph becoming north northeast 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 30. Windy, with a north northeast wind 20 to 25 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 37 mph.
Friday
Sunny, with a high near 50. North northwest wind 11 to 17 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 25. North northwest wind 5 to 10 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 59. Breezy, with a south wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 31 mph.
Saturday Night
Mostly cloudy, with a low around 41. South wind 10 to 13 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 74. South wind 10 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 49. South wind 7 to 10 mph.
Monday
A slight chance of rain and thunderstorms after 1pm. Partly sunny, with a high near 78. Southeast wind 7 to 15 mph, with gusts as high as 21 mph.
Monday Night
A chance of rain and thunderstorms before 1am, then a slight chance of rain. Mostly cloudy, with a low around 53. East southeast wind 11 to 13 mph, with gusts as high as 20 mph.
Tuesday
A slight chance of rain and thunderstorms. Partly sunny, with a high near 78. South wind 11 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
A chance of rain and thunderstorms. Mostly cloudy, with a low around 48. South wind around 16 mph becoming north northwest after midnight. Winds could gust as high as 24 mph.
Wednesday
A chance of rain. Mostly cloudy, with a high near 63. Breezy, with a north northeast wind 16 to 18 mph, with gusts as high as 28 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
Last Update:
4:05 am CDT Mar 26, 2026
Forecast Valid:
4am CDT Mar 26, 2026-6pm CDT Apr 1, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation