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.

Overcast

45°F

7°C

Humidity 76%
Wind Speed SE 6 mph
Barometer 30.29 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 11 Apr 3:35 am CDT
Extended Forecast for

Portsmouth IA

  • Overnight

    Overnight: Scattered showers, mainly after 4am. Mostly cloudy, with a steady temperature around 44. East southeast wind around 9 mph, with gusts as high as 16 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Scattered
    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms, mainly between noon and 3pm. High near 61. Breezy, with an east southeast wind 11 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 61 °F

    Showers then
    Chance
    T-storms and
    Breezy

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms between 2am and 4am, then a slight chance of showers. Mostly cloudy, with a low around 60. Breezy, with a south southeast wind 17 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Breezy.
    Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 72. Breezy, with a south southwest wind 18 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 57. South wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 57 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 80. South wind 8 to 17 mph, with gusts as high as 25 mph.

    High: 80 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 59. South wind 9 to 11 mph, with gusts as high as 18 mph.

    Low: 59 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. South southwest wind 9 to 17 mph, with gusts as high as 25 mph.

    High: 83 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 51. Southwest wind 7 to 13 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Chance
    Showers

Detailed Forecast

Overnight
Scattered showers, mainly after 4am. Mostly cloudy, with a steady temperature around 44. East southeast wind around 9 mph, with gusts as high as 16 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms, mainly between noon and 3pm. High near 61. Breezy, with an east southeast wind 11 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. 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 between 2am and 4am, then a slight chance of showers. Mostly cloudy, with a low around 60. Breezy, with a south southeast wind 17 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 72. Breezy, with a south southwest wind 18 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 57. South wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
Mostly sunny, with a high near 80. South wind 8 to 17 mph, with gusts as high as 25 mph.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 59. South wind 9 to 11 mph, with gusts as high as 18 mph.
Tuesday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. South southwest wind 9 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 51. Southwest wind 7 to 13 mph, with gusts as high as 20 mph.
Wednesday
A chance of showers. Sunny, with a high near 76. Southwest wind 6 to 13 mph, with gusts as high as 18 mph.
Wednesday Night
A chance of showers. Mostly clear, with a low around 52. South wind around 8 mph.
Thursday
A slight chance of showers. Sunny, with a high near 78. South wind 7 to 15 mph, with gusts as high as 22 mph.
Thursday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 49. South wind around 11 mph, with gusts as high as 18 mph.
Friday
A chance of showers. Partly sunny, with a high near 68. Breezy, with a west southwest wind 11 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
Last Update:
2:52 am CDT Apr 11, 2026
Forecast Valid:
3am CDT Apr 11, 2026-6pm CDT Apr 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation