Portsmouth, Iowa Weather
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Weather Forecast for Portsmouth, Iowa : Shelby County
Issued: 4:35 am CDT Jun 5, 2025 Latitude: 41.6502669 Longitude: -95.5186142 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Friday Saturday Sunday Monday Tuesday Wednesday
20% chance of rain on Today 30% chance of rain on Tonight 40% chance of thunderstorms on Friday 30% chance of thunderstorms on Saturday 10% chance of thunderstorms on Sunday Mostly Sunny on Monday Sunny on Tuesday Sunny on Wednesday
High: 74°F Low: 57°F High: 73°F High: 79°F High: 76°F High: 74°F High: 78°F High: 84°F
Low: 56°F Low: 56°F Low: 51°F Low: 50°F Low: 54°F  
Rain Rain Thunderstorms Thunderstorms Thunderstorms Mostly Sunny Sunny Sunny
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Current Conditions at
HARLAN - (KHNR)
54°
Clear
as of 4:15 AM CDST
Rel. Humidity: 93%
Dew Point: 52°F
Visibility: 7 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
DENISON - (KDNS)
54°
Mostly Cloudy
as of 4:15 AM CDST
Rel. Humidity: 100%
Dew Point: 54°F
Visibility: 7 Miles
Pressure: 30.11 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Broken at 10000ft, Broken at 12000ft
Current Conditions at
COUNCIL BLUFFS - (KCBF)
59°
Partly Cloudy
Mist
as of 4:15 AM CDST
Rel. Humidity: 87%
Dew Point: 55°F
Visibility: 3 Miles
Pressure: 30.10 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Scattered at 11000ft
Current Conditions at
ATLANTIC - (KAIO)
54°
Cloudy
as of 4:15 AM CDST
Rel. Humidity: 100%
Dew Point: 54°F
Visibility: 8 Miles
Pressure: 30.09 in.
Flight Rule: VFR
Wind Data
5 MPH
0° North
Cloud Level(s): Solid Overcast at 10000ft
20% chance of rain Today Today... A 20 percent chance of showers after 4pm. Mostly cloudy, with a high near 74. Calm wind becoming southeast 5 to 9 mph in the morning. Winds could gust as high as 16 mph.

30% chance of rain Tonight Tonight... A 30 percent chance of showers, mainly after 4am. Cloudy, with a low around 57. East northeast wind 3 to 6 mph. New precipitation amounts of less than a tenth of an inch possible.

40% chance of thunderstorms Friday Friday... A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 73. East northeast wind 3 to 6 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

40% chance of thunderstorms Friday Night Friday Night... A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56. North wind around 5 mph becoming calm in the evening. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

30% chance of thunderstorms Saturday Saturday... A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 79. Calm wind becoming west 5 to 7 mph in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

30% chance of thunderstorms Saturday Night Saturday Night... A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly clear, with a low around 56. South southwest wind around 6 mph. Chance of precipitation is 30%.

10% chance of thunderstorms Sunday Sunday... A slight chance of thunderstorms before 7am. Mostly sunny, with a high near 76. Northwest wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 10%.

Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 51. West northwest wind 6 to 10 mph, with gusts as high as 17 mph.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 74. Northwest wind 7 to 15 mph, with gusts as high as 23 mph.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 50. North northwest wind 6 to 11 mph becoming light northwest after midnight. Winds could gust as high as 17 mph.

Sunny on Tuesday Tuesday... Sunny, with a high near 78. Northwest wind 3 to 8 mph.

Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 54. Southwest wind around 6 mph becoming light and variable.

Sunny on Wednesday Wednesday... Sunny, with a high near 84. South wind 6 to 11 mph, with gusts as high as 18 mph.

Current Radar Image


Sun Almanac for Portsmouth, Iowa
Sunrise: 05:48 AM
Sunset: 8:53 PM
Civil Sunrise:05:15 AM
Civil Sunset: 9:27 PM
Nautical Sunrise: 04:32 AM
Nautical Sunset: 10:10 PM
Astro Sunrise: 03:41 AM
Astro Sunset: 11:01 PM
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