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.

Mostly Cloudy

55°F

13°C

Humidity 94%
Wind Speed S 16 mph
Barometer 30.08 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 11 Apr 1:35 pm CDT
Extended Forecast for

Portsmouth IA

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms, mainly before 2pm. Cloudy, with a high near 62. Breezy, with a south southeast wind around 18 mph, with gusts as high as 29 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 62 °F

    Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 59. Breezy, with a south southeast wind 17 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Chance
    T-storms and
    Breezy

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 73. Breezy, with a south southwest wind 20 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.

    High: 73 °F

    Breezy.
    Slight Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 56. South wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 80. Breezy, with a south wind 8 to 18 mph, with gusts as high as 26 mph.

    High: 80 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 58. South southwest wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    Low: 58 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 81 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly before 1am. Partly cloudy, with a low around 51. Southwest wind 8 to 14 mph becoming north northwest after midnight. Winds could gust as high as 21 mph.

    Low: 51 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 75. North northwest wind 8 to 11 mph becoming west southwest in the afternoon. Winds could gust as high as 17 mph.

    High: 75 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms, mainly before 2pm. Cloudy, with a high near 62. Breezy, with a south southeast wind around 18 mph, with gusts as high as 29 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 59. Breezy, with a south southeast wind 17 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 73. Breezy, with a south southwest wind 20 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 56. South wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
Mostly sunny, with a high near 80. Breezy, with a south wind 8 to 18 mph, with gusts as high as 26 mph.
Monday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 58. South southwest wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
A chance of showers, mainly before 1am. Partly cloudy, with a low around 51. Southwest wind 8 to 14 mph becoming north northwest after midnight. Winds could gust as high as 21 mph.
Wednesday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 75. North northwest wind 8 to 11 mph becoming west southwest in the afternoon. Winds could gust as high as 17 mph.
Wednesday Night
A slight chance of showers before 1am. Mostly clear, with a low around 50. South southwest wind around 7 mph.
Thursday
Sunny, with a high near 80. South southwest wind 7 to 16 mph, with gusts as high as 24 mph.
Thursday Night
A chance of showers. Partly cloudy, with a low around 55. South wind 13 to 15 mph, with gusts as high as 23 mph.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 71. Breezy, with a south wind 15 to 22 mph becoming west northwest in the afternoon. Winds could gust as high as 29 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
Last Update:
1:35 pm CDT Apr 11, 2026
Forecast Valid:
1pm CDT Apr 11, 2026-6pm CDT Apr 17, 2026
 
Forecast Discussion
 
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