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

46°F

8°C

Humidity 76%
Wind Speed S 17 mph
Barometer 29.90 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 8 Apr 4:15 am CDT
Extended Forecast for

Portsmouth IA

  • Today

    Today: A slight chance of showers between noon and 4pm. Increasing clouds, with a high near 68. Windy, with a south wind 18 to 28 mph becoming west northwest in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 20%.

    High: 68 °F

    Windy. Sunny
    then Slight
    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 34. North northwest wind 5 to 8 mph becoming light and variable after midnight.

    Low: 34 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: A chance of showers, then showers and possibly a thunderstorm after 4pm. High near 58. North northeast wind 5 to 9 mph becoming east in the afternoon. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 58 °F

    Slight Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 36. Northeast wind around 9 mph. Chance of precipitation is 90%. New rainfall 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 9 mph.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers, mainly after 1am. Partly cloudy, with a low around 42. East southeast wind 6 to 8 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 1pm. Cloudy, with a high near 65. East southeast wind 10 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

    High: 65 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 57. Breezy, with a south southeast wind 16 to 20 mph, with gusts as high as 29 mph.

    Low: 57 °F

    Showers
    Likely and
    Breezy

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 73. Windy, with a south wind 20 to 26 mph, with gusts as high as 36 mph.

    High: 73 °F

    Showers
    Likely and
    Windy

Detailed Forecast

Today
A slight chance of showers between noon and 4pm. Increasing clouds, with a high near 68. Windy, with a south wind 18 to 28 mph becoming west northwest in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 34. North northwest wind 5 to 8 mph becoming light and variable after midnight.
Thursday
A chance of showers, then showers and possibly a thunderstorm after 4pm. High near 58. North northeast wind 5 to 9 mph becoming east in the afternoon. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 36. Northeast wind around 9 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Mostly sunny, with a high near 57. Northeast wind around 9 mph.
Friday Night
A 50 percent chance of showers, mainly after 1am. Partly cloudy, with a low around 42. East southeast wind 6 to 8 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Showers likely, with thunderstorms also possible after 1pm. Cloudy, with a high near 65. East southeast wind 10 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Saturday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 57. Breezy, with a south southeast wind 16 to 20 mph, with gusts as high as 29 mph.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 73. Windy, with a south wind 20 to 26 mph, with gusts as high as 36 mph.
Sunday Night
A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 57. Breezy, with a south wind 18 to 21 mph, with gusts as high as 31 mph.
Monday
A chance of showers. Mostly sunny, with a high near 75. Breezy, with a south wind 16 to 23 mph, with gusts as high as 31 mph.
Monday Night
A chance of showers. Mostly cloudy, with a low around 40. Southwest wind 13 to 16 mph becoming north after midnight. Winds could gust as high as 23 mph.
Tuesday
A chance of showers. Partly sunny, with a high near 53. Breezy, with a north wind 15 to 20 mph, with gusts as high as 25 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:
4:21 am CDT Apr 8, 2026
Forecast Valid:
4am CDT Apr 8, 2026-6pm CDT Apr 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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