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

43°F

6°C

Humidity 66%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 8 Apr 10:35 pm CDT
Extended Forecast for

Portsmouth IA

  • Tonight

    Tonight: Partly cloudy, with a low around 36. North northwest wind 5 to 7 mph.

    Low: 36 °F

    Partly Cloudy

  • Thursday

    Thursday: Showers likely, then showers and possibly a thunderstorm after 4pm. High near 59. Light north northeast wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 16 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 59 °F

    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 36. Northeast wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 36 °F

    Showers

  • Friday

    Friday: Mostly sunny, with a high near 57. Northeast wind around 10 mph, with gusts as high as 16 mph.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 41. East southeast wind 6 to 9 mph, with gusts as high as 16 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 41 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 67. Breezy, with a south southeast wind 11 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 67 °F

    Showers and
    Breezy

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely after 1am. Cloudy, with a low around 59. Breezy, with a south wind 16 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely and
    Breezy

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 76. Breezy, with a south southwest wind 20 to 24 mph, with gusts as high as 33 mph.

    High: 76 °F

    Showers
    Likely and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers before 1am. Partly cloudy, with a low around 58. South wind 14 to 17 mph, with gusts as high as 25 mph.

    Low: 58 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 36. North northwest wind 5 to 7 mph.
Thursday
Showers likely, then showers and possibly a thunderstorm after 4pm. High near 59. Light north northeast wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 16 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and possibly a thunderstorm. Low around 36. Northeast wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Mostly sunny, with a high near 57. Northeast wind around 10 mph, with gusts as high as 16 mph.
Friday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 41. East southeast wind 6 to 9 mph, with gusts as high as 16 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers and possibly a thunderstorm. High near 67. Breezy, with a south southeast wind 11 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. 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, then showers likely after 1am. Cloudy, with a low around 59. Breezy, with a south wind 16 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 76. Breezy, with a south southwest wind 20 to 24 mph, with gusts as high as 33 mph.
Sunday Night
A chance of showers before 1am. Partly cloudy, with a low around 58. South wind 14 to 17 mph, with gusts as high as 25 mph.
Monday
A slight chance of showers after 1pm. Mostly sunny, with a high near 79. Breezy, with a south southwest wind 13 to 18 mph, with gusts as high as 25 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 51. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Tuesday
A chance of showers. Partly sunny, with a high near 63. Breezy, with a south southwest wind 10 to 18 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 30. North wind 11 to 15 mph, with gusts as high as 23 mph.
Wednesday
A chance of showers. Partly sunny, with a high near 51. North northwest wind 10 to 13 mph, with gusts as high as 18 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
Last Update:
10:35 pm CDT Apr 8, 2026
Forecast Valid:
10pm CDT Apr 8, 2026-6pm CDT Apr 15, 2026
 
Forecast Discussion
 
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Additional Resources

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