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.

Partly Cloudy

50°F

10°C

Humidity 88%
Wind Speed N 8 mph
Barometer 30.07 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 14 Oct 3:15 am CDT
Extended Forecast for

Portsmouth IA

  • Overnight

    Overnight: Mostly cloudy, with a low around 47. North northeast wind around 7 mph.

    Low: 47 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 62. North northeast wind around 9 mph.

    High: 62 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers, with thunderstorms also possible after 4am. Cloudy, with a low around 49. East northeast wind around 6 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 3pm, then showers likely. High near 59. Northeast wind 7 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 59 °F

    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 39. North northwest wind 14 to 17 mph, with gusts as high as 26 mph.

    Low: 39 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 54. Breezy, with a north northwest wind 14 to 20 mph, with gusts as high as 28 mph.

    High: 54 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 32. North northwest wind around 5 mph becoming calm in the evening.

    Low: 32 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 60. Light south wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 22 mph.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 41. South wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 41 °F

    Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 47. North northeast wind around 7 mph.
Wednesday
Partly sunny, with a high near 62. North northeast wind around 9 mph.
Wednesday Night
A chance of showers, with thunderstorms also possible after 4am. Cloudy, with a low around 49. East northeast wind around 6 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and possibly a thunderstorm before 3pm, then showers likely. High near 59. Northeast wind 7 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Partly cloudy, with a low around 39. North northwest wind 14 to 17 mph, with gusts as high as 26 mph.
Friday
Mostly sunny, with a high near 54. Breezy, with a north northwest wind 14 to 20 mph, with gusts as high as 28 mph.
Friday Night
Mostly clear, with a low around 32. North northwest wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 60. Light south wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 22 mph.
Saturday Night
Clear, with a low around 41. South wind 11 to 14 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 64. South wind around 15 mph, with gusts as high as 23 mph.
Sunday Night
Mostly cloudy, with a low around 46. South wind 5 to 9 mph becoming light south southwest after midnight. Winds could gust as high as 18 mph.
Monday
Mostly sunny, with a high near 68. South southeast wind 3 to 5 mph.
Monday Night
Mostly clear, with a low around 47. Calm wind.
Tuesday
Mostly sunny, with a high near 72. Light south southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 16 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
Last Update:
3:21 am CDT Oct 14, 2026
Forecast Valid:
3am CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
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Additional Resources

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Chance of Precipitation