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

23°F

-5°C

Humidity 86%
Wind Speed NE 12 mph
Barometer 30.36 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 1 Mar 1:15 am CST
Extended Forecast for

Portsmouth IA

  • Overnight

    Overnight: Mostly cloudy, with a low around 17. East northeast wind 7 to 9 mph, with gusts as high as 16 mph.

    Low: 17 °F

    Mostly Cloudy

  • Sunday

    Sunday: Cloudy, with a high near 34. East wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 34 °F

    Cloudy

  • Sunday Night

    Sunday Night: A slight chance of snow between midnight and 1am. Mostly cloudy, with a low around 24. East southeast wind 6 to 8 mph, with gusts as high as 16 mph. Chance of precipitation is 20%.

    Low: 24 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Monday

    Monday: Cloudy, with a high near 43. South southeast wind 7 to 10 mph, with gusts as high as 16 mph.

    High: 43 °F

    Cloudy

  • Monday Night

    Monday Night: Rain likely, mainly after midnight. Cloudy, with a low around 34. Southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 34 °F

    Rain Likely

  • Tuesday

    Tuesday: A 40 percent chance of rain. Mostly cloudy, with a high near 48. East northeast wind 6 to 10 mph, with gusts as high as 16 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 36. East northeast wind 6 to 8 mph. Chance of precipitation is 50%.

    Low: 36 °F

    Chance Rain

  • Wednesday

    Wednesday: A chance of rain, mainly before noon. Partly sunny, with a high near 52. North northeast wind 5 to 7 mph.

    High: 52 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A slight chance of rain. Mostly cloudy, with a low around 35. Light and variable wind becoming southeast around 5 mph.

    Low: 35 °F

    Slight Chance
    Rain

Detailed Forecast

Overnight
Mostly cloudy, with a low around 17. East northeast wind 7 to 9 mph, with gusts as high as 16 mph.
Sunday
Cloudy, with a high near 34. East wind 9 to 11 mph, with gusts as high as 18 mph.
Sunday Night
A slight chance of snow between midnight and 1am. Mostly cloudy, with a low around 24. East southeast wind 6 to 8 mph, with gusts as high as 16 mph. Chance of precipitation is 20%.
Monday
Cloudy, with a high near 43. South southeast wind 7 to 10 mph, with gusts as high as 16 mph.
Monday Night
Rain likely, mainly after midnight. Cloudy, with a low around 34. Southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A 40 percent chance of rain. Mostly cloudy, with a high near 48. East northeast wind 6 to 10 mph, with gusts as high as 16 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A chance of rain, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 36. East northeast wind 6 to 8 mph. Chance of precipitation is 50%.
Wednesday
A chance of rain, mainly before noon. Partly sunny, with a high near 52. North northeast wind 5 to 7 mph.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 35. Light and variable wind becoming southeast around 5 mph.
Thursday
Mostly sunny, with a high near 64. South southeast wind 5 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Rain and thunderstorms likely. Mostly cloudy, with a low around 41. South southeast wind around 10 mph becoming west after midnight. Winds could gust as high as 16 mph.
Friday
A chance of rain. Mostly cloudy, with a high near 59. West northwest wind 9 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 21 mph.
Friday Night
A chance of rain. Mostly cloudy, with a low around 32. South southwest wind 7 to 10 mph becoming north after midnight. Winds could gust as high as 16 mph.
Saturday
A slight chance of rain. Partly sunny, with a high near 55. North wind 7 to 10 mph becoming east in the afternoon. Winds could gust as high as 16 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:
12:35 am CST Mar 1, 2026
Forecast Valid:
1am CST Mar 1, 2026-6pm CST Mar 7, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation