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 with Haze and Breezy

9°F

-13°C

Humidity 61%
Wind Speed NW 25 G 32 mph
Barometer 30.23 in
Dewpoint -2°F (-19°C)
Visibility 6.00 mi
Wind Chill-12°F (-24°C)
Last update 17 Jan 11:35 am CST
Extended Forecast for

Portsmouth IA

  • Today

    Today: A 20 percent chance of snow showers before noon. Partly sunny, with a high near 11. Wind chill values as low as -11. Blustery, with a northwest wind 17 to 23 mph, with gusts as high as 31 mph.

    High: 11 °F

    Slight Chance
    Snow Showers
    and Blustery

  • Tonight

    Tonight: A 20 percent chance of snow showers after 4am. Increasing clouds, with a low around 5. Northwest wind 5 to 14 mph becoming south southwest after midnight. Winds could gust as high as 22 mph.

    Low: 5 °F

    Partly Cloudy
    then Slight
    Chance Snow
    Showers

  • Sunday

    Sunday: A 30 percent chance of snow showers, mainly between 10am and noon. Cloudy, then gradually becoming mostly sunny, with a high near 31. Windy, with a south southwest wind 15 to 20 mph becoming northwest 26 to 31 mph in the morning. Winds could gust as high as 41 mph.

    High: 31 °F

    Chance Snow
    Showers and
    Windy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 2. Wind chill values as low as -16. Windy, with a north northwest wind 25 to 30 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph.

    Low: 2 °F

    Partly Cloudy
    and Windy

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 17. Northwest wind 9 to 15 mph, with gusts as high as 22 mph.

    High: 17 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 6. West northwest wind 5 to 7 mph becoming south southwest after midnight.

    Low: 6 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 35. South southwest wind 6 to 10 mph, with gusts as high as 17 mph.

    High: 35 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 19. South southwest wind 7 to 9 mph becoming northwest after midnight. Winds could gust as high as 16 mph.

    Low: 19 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 29. Northwest wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 29 °F

    Partly Sunny

Detailed Forecast

Today
A 20 percent chance of snow showers before noon. Partly sunny, with a high near 11. Wind chill values as low as -11. Blustery, with a northwest wind 17 to 23 mph, with gusts as high as 31 mph.
Tonight
A 20 percent chance of snow showers after 4am. Increasing clouds, with a low around 5. Northwest wind 5 to 14 mph becoming south southwest after midnight. Winds could gust as high as 22 mph.
Sunday
A 30 percent chance of snow showers, mainly between 10am and noon. Cloudy, then gradually becoming mostly sunny, with a high near 31. Windy, with a south southwest wind 15 to 20 mph becoming northwest 26 to 31 mph in the morning. Winds could gust as high as 41 mph.
Sunday Night
Partly cloudy, with a low around 2. Wind chill values as low as -16. Windy, with a north northwest wind 25 to 30 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph.
M.L.King Day
Mostly sunny, with a high near 17. Northwest wind 9 to 15 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 6. West northwest wind 5 to 7 mph becoming south southwest after midnight.
Tuesday
Partly sunny, with a high near 35. South southwest wind 6 to 10 mph, with gusts as high as 17 mph.
Tuesday Night
Mostly cloudy, with a low around 19. South southwest wind 7 to 9 mph becoming northwest after midnight. Winds could gust as high as 16 mph.
Wednesday
Partly sunny, with a high near 29. Northwest wind 8 to 14 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly cloudy, with a low around 11. Northwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 27. West northwest wind 6 to 10 mph, with gusts as high as 18 mph.
Thursday Night
Partly cloudy, with a low around 12. West wind around 8 mph becoming south southeast in the evening.
Friday
Partly sunny, with a high near 27. South wind 8 to 11 mph becoming north in the afternoon. Winds could gust as high as 17 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:
10:42 am CST Jan 17, 2026
Forecast Valid:
11am CST Jan 17, 2026-6pm CST Jan 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation