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

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Fair

46°F

8°C

Humidity 66%
Wind Speed Calm
Barometer 29.81 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 16 Feb 7:15 pm CST
Extended Forecast for

Portsmouth IA

  • Tonight

    Tonight: Increasing clouds, with a low around 43. East southeast wind 5 to 9 mph, with gusts as high as 18 mph.

    Low: 43 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A slight chance of drizzle before noon. Cloudy through mid morning, then gradual clearing, with a high near 71. Windy, with a south wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 37 mph.

    High: 71 °F

    Slight Chance
    Drizzle and
    Windy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain before midnight. Mostly cloudy, then gradually becoming clear, with a low around 41. Breezy, with a south wind 14 to 18 mph becoming west after midnight. Winds could gust as high as 29 mph.

    Low: 41 °F

    Chance Rain
    and Breezy
    then Mostly
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 61. West wind 8 to 16 mph, with gusts as high as 24 mph.

    High: 61 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 32. West wind 5 to 13 mph becoming northeast in the evening. Winds could gust as high as 21 mph.

    Low: 32 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of rain before 7am, then rain and snow likely. Mostly cloudy, with a high near 46. Breezy, with a northeast wind 14 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 46 °F

    Rain/Snow
    Likely and
    Breezy

  • Thursday Night

    Thursday Night: Rain and snow likely before midnight, then a chance of snow. Mostly cloudy, with a low around 20. Blustery, with a northwest wind 15 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    Low: 20 °F

    Rain/Snow
    Likely and
    Blustery then
    Chance Snow

  • Friday

    Friday: Mostly sunny, with a high near 34. Northwest wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 34 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 18. North northwest wind 5 to 7 mph.

    Low: 18 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 43. East southeast wind 5 to 9 mph, with gusts as high as 18 mph.
Tuesday
A slight chance of drizzle before noon. Cloudy through mid morning, then gradual clearing, with a high near 71. Windy, with a south wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 37 mph.
Tuesday Night
A 30 percent chance of rain before midnight. Mostly cloudy, then gradually becoming clear, with a low around 41. Breezy, with a south wind 14 to 18 mph becoming west after midnight. Winds could gust as high as 29 mph.
Wednesday
Sunny, with a high near 61. West wind 8 to 16 mph, with gusts as high as 24 mph.
Wednesday Night
Partly cloudy, with a low around 32. West wind 5 to 13 mph becoming northeast in the evening. Winds could gust as high as 21 mph.
Thursday
A chance of rain before 7am, then rain and snow likely. Mostly cloudy, with a high near 46. Breezy, with a northeast wind 14 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain and snow likely before midnight, then a chance of snow. Mostly cloudy, with a low around 20. Blustery, with a northwest wind 15 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Friday
Mostly sunny, with a high near 34. Northwest wind 8 to 14 mph, with gusts as high as 21 mph.
Friday Night
Partly cloudy, with a low around 18. North northwest wind 5 to 7 mph.
Saturday
A slight chance of snow after noon. Partly sunny, with a high near 38. North wind 6 to 9 mph.
Saturday Night
A slight chance of snow. Partly cloudy, with a low around 16. North northwest wind around 7 mph.
Sunday
Sunny, with a high near 35. North northwest wind 6 to 9 mph.
Sunday Night
Partly cloudy, with a low around 14. North northwest wind 5 to 7 mph becoming east northeast after midnight.
Monday
Mostly sunny, with a high near 40. East northeast wind 6 to 14 mph becoming south southeast in the afternoon. Winds could gust as high as 21 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
Last Update:
6:35 pm CST Feb 16, 2026
Forecast Valid:
7pm CST Feb 16, 2026-6pm CST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation