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.

Overcast

37°F

3°C

Humidity 93%
Wind Speed E 9 mph
Barometer 29.90 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 3 Apr 3:55 am CDT
Extended Forecast for

Portsmouth IA

  • Today

    Today: Rain and thunderstorms before 1pm, then rain and possibly a thunderstorm, mainly after 1pm. Patchy fog before 4pm, then patchy fog after 5pm. High near 51. East wind 13 to 15 mph becoming north in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 51 °F

    Rain and
    Patchy Fog

  • Tonight

    Tonight: A chance of rain and thunderstorms before 8pm, then a slight chance of rain between 8pm and 9pm. Patchy fog between 8pm and 9pm. Otherwise, mostly cloudy, with a low around 29. West northwest wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 29 °F

    Chance
    T-storms and
    Patchy Fog
    then Mostly
    Cloudy

  • Saturday

    Saturday: A slight chance of snow showers, mixing with rain after 10am, then gradually ending. Mostly cloudy, with a high near 46. Breezy, with a west northwest wind 16 to 23 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.

    High: 46 °F

    Slight Chance
    Rain/Snow and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26. Northwest wind 6 to 16 mph, with gusts as high as 24 mph.

    Low: 26 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58. West northwest wind 6 to 14 mph, with gusts as high as 21 mph.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31. North northwest wind 6 to 10 mph, with gusts as high as 16 mph.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 48. North wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 48 °F

    Slight Chance
    Rain

  • Monday Night

    Monday Night: A slight chance of snow after 1am. Mostly cloudy, with a low around 22. North wind 8 to 10 mph becoming east northeast after midnight. Winds could gust as high as 16 mph.

    Low: 22 °F

    Partly Cloudy
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: A slight chance of rain and snow after 1pm. Partly sunny, with a high near 49. Breezy, with a southeast wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 49 °F

    Partly Sunny
    then Slight
    Chance
    Rain/Snow and
    Breezy

Detailed Forecast

Today
Rain and thunderstorms before 1pm, then rain and possibly a thunderstorm, mainly after 1pm. Patchy fog before 4pm, then patchy fog after 5pm. High near 51. East wind 13 to 15 mph becoming north in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of rain and thunderstorms before 8pm, then a slight chance of rain between 8pm and 9pm. Patchy fog between 8pm and 9pm. Otherwise, mostly cloudy, with a low around 29. West northwest wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A slight chance of snow showers, mixing with rain after 10am, then gradually ending. Mostly cloudy, with a high near 46. Breezy, with a west northwest wind 16 to 23 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 26. Northwest wind 6 to 16 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 58. West northwest wind 6 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 31. North northwest wind 6 to 10 mph, with gusts as high as 16 mph.
Monday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 48. North wind 6 to 13 mph, with gusts as high as 20 mph.
Monday Night
A slight chance of snow after 1am. Mostly cloudy, with a low around 22. North wind 8 to 10 mph becoming east northeast after midnight. Winds could gust as high as 16 mph.
Tuesday
A slight chance of rain and snow after 1pm. Partly sunny, with a high near 49. Breezy, with a southeast wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
A chance of rain, mainly before 1am. Mostly cloudy, with a low around 38. Breezy, with a south southeast wind 17 to 21 mph, with gusts as high as 29 mph.
Wednesday
Mostly sunny, with a high near 72. Windy, with a south southwest wind 21 to 28 mph, with gusts as high as 36 mph.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 41. Breezy, with a south southwest wind 17 to 20 mph becoming east after midnight. Winds could gust as high as 28 mph.
Thursday
Rain likely. Mostly cloudy, with a high near 57. Breezy, with a northeast wind 17 to 22 mph, with gusts as high as 30 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
Last Update:
5:18 am CDT Apr 3, 2026
Forecast Valid:
6am CDT Apr 3, 2026-6pm CDT Apr 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation