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

4°C

39°F

Humidity 100%
Wind Speed Calm
Barometer 30.09 in
Dewpoint 4°C (39°F)
Visibility 16 km
Last update 5 May 2:55 am CDT
Extended Forecast for

Portsmouth IA

  • Overnight

    Overnight: Clear, with a low around 4. Calm wind.

    Low: 4 °C

    Clear

  • Sunday

    Sunday: Sunny, with a high near 18. South southeast wind 5 to 10 km/h increasing to 16 to 21 km/h in the afternoon.

    High: 18 °C

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 9. Southeast wind 16 to 18 km/h, with gusts as high as 32 km/h.

    Low: 9 °C

    Mostly Clear

  • Monday

    Monday: Showers likely, with thunderstorms also possible after 4pm. Increasing clouds, with a high near 22. Breezy, with a south southeast wind 18 to 23 km/h increasing to 32 to 37 km/h in the afternoon. Winds could gust as high as 55 km/h. Chance of precipitation is 60%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

    High: 22 °C

    Breezy.
    Slight Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms after 1am. Some of the storms could produce heavy rainfall. Low around 9. Breezy, with a south southeast wind 27 to 32 km/h decreasing to 13 to 18 km/h after midnight. Winds could gust as high as 48 km/h. Chance of precipitation is 80%. New rainfall amounts between 2 and 3 cm possible.

    Low: 9 °C

    Heavy Rain
    and Breezy
    then Heavy
    Rain

  • Tuesday

    Tuesday: Mostly sunny, with a high near 21. West southwest wind 14 to 19 km/h increasing to 22 to 27 km/h in the afternoon. Winds could gust as high as 40 km/h.

    High: 21 °C

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 9. West southwest wind 16 to 21 km/h becoming south 10 to 15 km/h after midnight. Winds could gust as high as 29 km/h.

    Low: 9 °C

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 20. Southeast wind 14 to 21 km/h becoming northwest in the afternoon. Winds could gust as high as 32 km/h.

    High: 20 °C

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 7. West northwest wind 18 to 24 km/h, with gusts as high as 35 km/h.

    Low: 7 °C

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Clear, with a low around 4. Calm wind.
Sunday
Sunny, with a high near 18. South southeast wind 5 to 10 km/h increasing to 16 to 21 km/h in the afternoon.
Sunday Night
Mostly clear, with a low around 9. Southeast wind 16 to 18 km/h, with gusts as high as 32 km/h.
Monday
Showers likely, with thunderstorms also possible after 4pm. Increasing clouds, with a high near 22. Breezy, with a south southeast wind 18 to 23 km/h increasing to 32 to 37 km/h in the afternoon. Winds could gust as high as 55 km/h. Chance of precipitation is 60%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.
Monday Night
Showers and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms after 1am. Some of the storms could produce heavy rainfall. Low around 9. Breezy, with a south southeast wind 27 to 32 km/h decreasing to 13 to 18 km/h after midnight. Winds could gust as high as 48 km/h. Chance of precipitation is 80%. New rainfall amounts between 2 and 3 cm possible.
Tuesday
Mostly sunny, with a high near 21. West southwest wind 14 to 19 km/h increasing to 22 to 27 km/h in the afternoon. Winds could gust as high as 40 km/h.
Tuesday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 9. West southwest wind 16 to 21 km/h becoming south 10 to 15 km/h after midnight. Winds could gust as high as 29 km/h.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 20. Southeast wind 14 to 21 km/h becoming northwest in the afternoon. Winds could gust as high as 32 km/h.
Wednesday Night
A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 7. West northwest wind 18 to 24 km/h, with gusts as high as 35 km/h.
Thursday
A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 17. Breezy, with a north northwest wind 23 to 29 km/h, with gusts as high as 47 km/h.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 6. North northwest wind 21 to 26 km/h, with gusts as high as 39 km/h.
Friday
A chance of showers. Mostly sunny, with a high near 18. Breezy, with a north northwest wind 23 to 29 km/h, with gusts as high as 42 km/h.
Friday Night
Mostly clear, with a low around 6. West northwest wind 16 to 24 km/h, with gusts as high as 35 km/h.
Saturday
Mostly sunny, with a high near 21. Northwest wind 16 to 26 km/h, with gusts as high as 37 km/h.
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 m)
Last Update:
2:47 am CDT May 5, 2024
Forecast Valid:
3am CDT May 5, 2024-6pm CDT May 11, 2024
 
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Additional Resources

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High Temperature

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Chance of Precipitation