Local Forecast

Portsmouth, IA Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Portsmouth, IA.

Active Alerts 2 active

Hour-by-Hour  Current Observation

Thursday 1:10 PM CDTThursday 1:10 PM

°F °C
Regional Observations →
75°F

Clear

  • 95° / 75° High / Low
  • 75° Feels Like
  • 0% Chance of Rain

Wind

6 mph

ENE

UV Index

11

Extreme

Humidity

47%

Dew 53°F

Sun

5:50 AM · 9:00 PM

Rise · Set

Source: DENISON (KDNS). Slider scrubs the next 12 hours.

5-Day Outlook

Through Friday

Local Radar →

Today

95° 75°

Mostly Sunny

Overnight: Chance of Thunderstorms

Detailed forecast

Today

Sunny, with a high near 95. Heat index values as high as 106. South wind 17 to 24 mph, with gusts as high as 33 mph.

Night

A slight chance of showers and thunderstorms between 8pm and 10pm, then a chance of showers and thunderstorms between 10pm and midnight, then a slight chance of showers and thunderstorms. Mostly cloudy. Low around 74, with temperatures rising to around 76 overnight. Heat index values as high as 107. South wind 10 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.

Tuesday

93° 75°

Partly Sunny

Overnight: Chance of Thunderstorms

Detailed forecast

Tuesday

A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 93. South wind 12 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

Night

A chance of showers and thunderstorms between 7pm and 10pm, then a chance of showers and thunderstorms between 10pm and 4am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 74. South wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

Wednesday

93° 75°

Isolated T-storm

Overnight: Chance of Scattered Thunderstorms

Detailed forecast

Wednesday

A chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 92. South wind 12 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.

Night

A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 74. South wind 10 to 20 mph, with gusts as high as 28 mph.

Thursday

93° 73°

Partly Sunny

Overnight: Chance of Scattered Thunderstorms

Detailed forecast

Thursday

A chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 93. South wind 10 to 17 mph, with gusts as high as 25 mph.

Night

A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 73. South wind 10 to 17 mph, with gusts as high as 25 mph.

Friday

95° 73°

Mostly Sunny

Overnight: Chance of Scattered Thunderstorms

Detailed forecast

Friday

A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 94. South wind 10 to 15 mph, with gusts as high as 21 mph.

Night

A chance of showers and thunderstorms after 7pm. Mostly clear, with a low around 73. South southeast wind 8 to 15 mph, with gusts as high as 23 mph.

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