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

64°F

18°C

Humidity 64%
Wind Speed SE 8 mph
Barometer 29.96 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 9 Oct 1:15 am CDT
Extended Forecast for

Portsmouth IA

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57. Southeast wind around 8 mph, with gusts as high as 17 mph.

    Low: 57 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Sunny, with a high near 85. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 65. South wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 65 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 85. Breezy, with a south wind 15 to 18 mph, with gusts as high as 28 mph.

    High: 85 °F

    Sunny then
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Clear, with a low around 63. South wind 13 to 15 mph, with gusts as high as 24 mph.

    Low: 63 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 82. South wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 64. South southwest wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 64 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Sunny, with a high near 79. South southwest wind 7 to 9 mph.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. North wind 6 to 8 mph.

    Low: 54 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57. Southeast wind around 8 mph, with gusts as high as 17 mph.
Friday
Sunny, with a high near 85. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Friday Night
Clear, with a low around 65. South wind 9 to 13 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 85. Breezy, with a south wind 15 to 18 mph, with gusts as high as 28 mph.
Saturday Night
Clear, with a low around 63. South wind 13 to 15 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 82. South wind 11 to 15 mph, with gusts as high as 23 mph.
Sunday Night
Partly cloudy, with a low around 64. South southwest wind 7 to 13 mph, with gusts as high as 21 mph.
Columbus Day
Sunny, with a high near 79. South southwest wind 7 to 9 mph.
Monday Night
Mostly clear, with a low around 54. North wind 6 to 8 mph.
Tuesday
A chance of showers, mainly after 1pm. Mostly sunny, with a high near 68. North northeast wind around 8 mph.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 53. East northeast wind 3 to 6 mph.
Wednesday
Showers likely. Mostly cloudy, with a high near 69. Southeast wind 9 to 11 mph, with gusts as high as 17 mph.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 56. South southeast wind 9 to 11 mph.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 68. Southwest wind 11 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 21 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.53°W (Elev. 1250 ft)
Last Update:
1:05 am CDT Oct 9, 2026
Forecast Valid:
1am CDT Oct 9, 2026-6pm CDT Oct 15, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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