Rapid Warm-Up Forecast Across Much of the Lower 48 Today and Tuesday

Most of the U.S. starts the week calm and unseasonably warm. The Heartland will be warmest, with highs 25–30° above average. Only the Gulf Coast stays chilly. Rain today is limited to western Washington while lake effect snow continues east of Lake Ontario. Cooler air returns after Tuesday, bringing a wintry mix to the Midwest and Northeast by Wednesday. Read More >

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Fair

25°F

-4°C

Humidity 100%
Wind Speed Calm
Barometer 30.17 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 12 Jan 7:15 am CST
Extended Forecast for

Portsmouth IA

  • Today

    Today: Sunny, with a high near 51. West southwest wind 3 to 7 mph.

    High: 51 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 34. Southwest wind 6 to 9 mph, with gusts as high as 16 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 53. Breezy, with a west northwest wind 10 to 18 mph, with gusts as high as 28 mph.

    High: 53 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 25. Blustery, with a north northwest wind 14 to 21 mph, with gusts as high as 30 mph.

    Low: 25 °F

    Partly Cloudy
    then Mostly
    Cloudy and
    Blustery

  • Wednesday

    Wednesday: Sunny, with a high near 32. Breezy, with a north wind 14 to 22 mph, with gusts as high as 30 mph.

    High: 32 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 13. North wind 6 to 11 mph becoming light and variable  after midnight. Winds could gust as high as 20 mph.

    Low: 13 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of snow after noon.  Partly sunny, with a high near 37. South wind 5 to 14 mph, with gusts as high as 22 mph.

    High: 37 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: A slight chance of snow.  Mostly cloudy, with a low around 26. Blustery, with a west southwest wind 13 to 18 mph becoming northwest after midnight. Winds could gust as high as 29 mph.

    Low: 26 °F

    Slight Chance
    Snow and
    Blustery

  • Friday

    Friday: A chance of snow, mainly before noon.  Mostly cloudy, with a high near 33. Breezy, with a northwest wind 18 to 24 mph, with gusts as high as 33 mph.

    High: 33 °F

    Chance Snow
    and Breezy

Detailed Forecast

Today
Sunny, with a high near 51. West southwest wind 3 to 7 mph.
Tonight
Partly cloudy, with a low around 34. Southwest wind 6 to 9 mph, with gusts as high as 16 mph.
Tuesday
Mostly cloudy, with a high near 53. Breezy, with a west northwest wind 10 to 18 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly cloudy, with a low around 25. Blustery, with a north northwest wind 14 to 21 mph, with gusts as high as 30 mph.
Wednesday
Sunny, with a high near 32. Breezy, with a north wind 14 to 22 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 13. North wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Thursday
A 20 percent chance of snow after noon. Partly sunny, with a high near 37. South wind 5 to 14 mph, with gusts as high as 22 mph.
Thursday Night
A slight chance of snow. Mostly cloudy, with a low around 26. Blustery, with a west southwest wind 13 to 18 mph becoming northwest after midnight. Winds could gust as high as 29 mph.
Friday
A chance of snow, mainly before noon. Mostly cloudy, with a high near 33. Breezy, with a northwest wind 18 to 24 mph, with gusts as high as 33 mph.
Friday Night
Mostly cloudy, with a low around 11. Blustery, with a northwest wind 14 to 21 mph, with gusts as high as 29 mph.
Saturday
Partly sunny, with a high near 20. North northwest wind 14 to 17 mph, with gusts as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 6. North northwest wind 10 to 13 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 27. West northwest wind 10 to 14 mph, with gusts as high as 21 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
6:35 am CST Jan 12, 2026
7am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
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Additional Resources

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