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.

A Few Clouds

12°F

-11°C

Humidity 62%
Wind Speed N 5 mph
Barometer 30.37 in
Dewpoint 1°F (-17°C)
Visibility 10.00 mi
Wind Chill4°F (-16°C)
Last update 29 Jan 11:35 pm CST
Extended Forecast for

Portsmouth IA

  • Tonight

    Tonight: Mostly cloudy, with a low around 3. Calm wind becoming north northeast around 6 mph after midnight.

    Low: 3 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 11. Wind chill values as low as -12. North northeast wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 11 °F

    Partly Sunny

  • Friday Night

    Friday Night: Clear, with a low around -3. North wind 5 to 9 mph becoming calm after midnight.

    Low: -3 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 20. Calm wind becoming south southwest 5 to 9 mph in the afternoon.

    High: 20 °F

    Sunny

  • Saturday Night

    Saturday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around 12. South wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 12 °F

    Snow Likely

  • Sunday

    Sunday: A 30 percent chance of snow before noon. Mostly cloudy, with a high near 37. South southwest wind 10 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 37 °F

    Chance Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 15. Northwest wind 5 to 10 mph becoming light north after midnight. Winds could gust as high as 17 mph.

    Low: 15 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31. Light and variable wind becoming east around 6 mph in the morning.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 17. Southeast wind around 6 mph.

    Low: 17 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 3. Calm wind becoming north northeast around 6 mph after midnight.
Friday
Partly sunny, with a high near 11. Wind chill values as low as -12. North northeast wind 7 to 14 mph, with gusts as high as 22 mph.
Friday Night
Clear, with a low around -3. North wind 5 to 9 mph becoming calm after midnight.
Saturday
Sunny, with a high near 20. Calm wind becoming south southwest 5 to 9 mph in the afternoon.
Saturday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 12. South wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Sunday
A 30 percent chance of snow before noon. Mostly cloudy, with a high near 37. South southwest wind 10 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 15. Northwest wind 5 to 10 mph becoming light north after midnight. Winds could gust as high as 17 mph.
Monday
Mostly sunny, with a high near 31. Light and variable wind becoming east around 6 mph in the morning.
Monday Night
Mostly cloudy, with a low around 17. Southeast wind around 6 mph.
Tuesday
A slight chance of snow. Partly sunny, with a high near 33. Southeast wind 6 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 16 mph.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 18. North northwest wind around 6 mph.
Wednesday
Mostly cloudy, with a high near 32. North northwest wind 6 to 11 mph, with gusts as high as 17 mph.
Wednesday Night
Mostly cloudy, with a low around 16. North northwest wind 6 to 8 mph.
Thursday
Mostly sunny, with a high near 38. West southwest wind 6 to 11 mph, with gusts as high as 18 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:
11:12 pm CST Jan 29, 2026
Forecast Valid:
11pm CST Jan 29, 2026-6pm CST Feb 5, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation