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

Above Average Temperatures for Most Today; Winter Weather Returns to the Upper Midwest and Great Lakes

Well above average temperatures are forecast today into Wednesday over most of the lower 48 states away from the Gulf Coast. A storm system passing across southern Canada will bring a wintry mix to the upper Great Lakes today. A trailing cold front will then bring the wintry mix from the central Appalachians through the Northeast U.S. Wednesday and Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Fair

41°F

5°C

Humidity 70%
Wind Speed W 13 mph
Barometer 29.83 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 13 Jan 7:55 am CST
Extended Forecast for

Portsmouth IA

  • Today

    Today: A chance of sprinkles before 2pm, then a slight chance of rain between 2pm and 5pm, then a chance of sprinkles after 5pm. Mostly cloudy, with a high near 55. West northwest wind 11 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    High: 55 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tonight

    Tonight: Partly cloudy, with a low around 23. Blustery, with a north northwest wind 13 to 18 mph, with gusts as high as 31 mph.

    Low: 23 °F

    Mostly Cloudy
    then Partly
    Cloudy and
    Blustery

  • Wednesday

    Wednesday: Sunny, with a steady temperature around 27. Blustery, with a north wind 10 to 18 mph, with gusts as high as 29 mph.

    High: 27 °F

    Sunny and
    Blustery

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 14. North wind 5 to 8 mph becoming calm in the evening.

    Low: 14 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 39. Light and variable wind becoming south southwest 10 to 15 mph in the morning. Winds could gust as high as 23 mph.

    High: 39 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 28. Blustery, with a west northwest wind 14 to 20 mph, with gusts as high as 30 mph.

    Low: 28 °F

    Partly Cloudy
    then Mostly
    Cloudy and
    Blustery

  • Friday

    Friday: A 20 percent chance of snow. Mostly cloudy, with a high near 34. Windy, with a northwest wind 20 to 25 mph, with gusts as high as 36 mph.

    High: 34 °F

    Slight Chance
    Snow and
    Windy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 12. Blustery, with a northwest wind 14 to 22 mph, with gusts as high as 31 mph.

    Low: 12 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 21. Blustery, with a northwest wind 14 to 18 mph, with gusts as high as 28 mph.

    High: 21 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Blustery

Detailed Forecast

Today
A chance of sprinkles before 2pm, then a slight chance of rain between 2pm and 5pm, then a chance of sprinkles after 5pm. Mostly cloudy, with a high near 55. West northwest wind 11 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 23. Blustery, with a north northwest wind 13 to 18 mph, with gusts as high as 31 mph.
Wednesday
Sunny, with a steady temperature around 27. Blustery, with a north wind 10 to 18 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly clear, with a low around 14. North wind 5 to 8 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 39. Light and variable wind becoming south southwest 10 to 15 mph in the morning. Winds could gust as high as 23 mph.
Thursday Night
Mostly cloudy, with a low around 28. Blustery, with a west northwest wind 14 to 20 mph, with gusts as high as 30 mph.
Friday
A 20 percent chance of snow. Mostly cloudy, with a high near 34. Windy, with a northwest wind 20 to 25 mph, with gusts as high as 36 mph.
Friday Night
Mostly cloudy, with a low around 12. Blustery, with a northwest wind 14 to 22 mph, with gusts as high as 31 mph.
Saturday
Partly sunny, with a high near 21. Blustery, with a northwest wind 14 to 18 mph, with gusts as high as 28 mph.
Saturday Night
Partly cloudy, with a low around 1. North northwest wind 10 to 15 mph, with gusts as high as 21 mph.
Sunday
Mostly sunny, with a high near 23. West northwest wind 10 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 8. West wind around 10 mph, with gusts as high as 17 mph.
M.L.King Day
Mostly sunny, with a high near 31. Northwest wind 8 to 13 mph, with gusts as high as 20 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:
7:21 am CST Jan 13, 2026
Forecast Valid:
8am CST Jan 13, 2026-6pm CST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation