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

Hazardous Weather Conditions

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Fair

57°F

14°C

Humidity 44%
Wind Speed N 13 G 24 mph
Barometer 30.03 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 31 Mar 6:35 pm CDT
Extended Forecast for

Portsmouth IA

  • Tonight

    Tonight: A chance of sprinkles before 7pm. Mostly cloudy, with a low around 36. North northeast wind 13 to 17 mph, with gusts as high as 24 mph.

    Low: 36 °F

    Chance
    Sprinkles

  • Wednesday

    Wednesday: Rain likely, then rain and possibly a thunderstorm after 4pm. High near 47. East wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 47 °F

    Chance Rain
    then Rain

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 39. East wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 39 °F

    Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 54. East wind 11 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 54 °F

    Rain

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 34. West northwest wind 6 to 10 mph becoming east northeast after midnight. Winds could gust as high as 16 mph.

    Low: 34 °F

    Partly Cloudy

  • Friday

    Friday: Rain likely and possibly a thunderstorm, then rain after 10am. High near 53. East wind 13 to 17 mph becoming north in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 53 °F

    Rain

  • Friday Night

    Friday Night: A chance of rain before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 28. Blustery, with a northwest wind 18 to 21 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.

    Low: 28 °F

    Blustery.
    Chance Rain
    then Chance
    Rain/Snow

  • Saturday

    Saturday: A chance of snow before 1pm, then a slight chance of rain. Mostly cloudy, with a high near 44. Windy, with a northwest wind 21 to 28 mph, with gusts as high as 36 mph.

    High: 44 °F

    Chance Snow
    and Breezy
    then Chance
    Rain/Snow and
    Windy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25. Blustery, with a northwest wind 15 to 23 mph, with gusts as high as 31 mph.

    Low: 25 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

Detailed Forecast

Tonight
A chance of sprinkles before 7pm. Mostly cloudy, with a low around 36. North northeast wind 13 to 17 mph, with gusts as high as 24 mph.
Wednesday
Rain likely, then rain and possibly a thunderstorm after 4pm. High near 47. East wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Rain and possibly a thunderstorm. Low around 39. East wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Thursday
Rain and possibly a thunderstorm. High near 54. East wind 11 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Partly cloudy, with a low around 34. West northwest wind 6 to 10 mph becoming east northeast after midnight. Winds could gust as high as 16 mph.
Friday
Rain likely and possibly a thunderstorm, then rain after 10am. High near 53. East wind 13 to 17 mph becoming north in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of rain before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 28. Blustery, with a northwest wind 18 to 21 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.
Saturday
A chance of snow before 1pm, then a slight chance of rain. Mostly cloudy, with a high near 44. Windy, with a northwest wind 21 to 28 mph, with gusts as high as 36 mph.
Saturday Night
Mostly cloudy, with a low around 25. Blustery, with a northwest wind 15 to 23 mph, with gusts as high as 31 mph.
Sunday
Sunny, with a high near 52. Northwest wind around 14 mph.
Sunday Night
Mostly clear, with a low around 32. Northwest wind around 9 mph becoming south southeast in the evening.
Monday
Mostly sunny, with a high near 65. South southwest wind 10 to 17 mph, with gusts as high as 23 mph.
Monday Night
Mostly cloudy, with a low around 36. Southwest wind around 14 mph becoming northeast after midnight. Winds could gust as high as 20 mph.
Tuesday
Partly sunny, with a high near 60. Breezy, with a northeast wind 11 to 18 mph, with gusts as high as 24 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:
4:35 pm CDT Mar 31, 2026
Forecast Valid:
6pm CDT Mar 31, 2026-6pm CDT Apr 7, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation