National Weather Service forecast
Portsmouth, Iowa Weather
Portsmouth 7-Day Forecast
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Overnight40°FSlight Chance Rain Showers17% chance of precipitation
A slight chance of rain showers between 3am and 5am. Cloudy. Low around 40, with temperatures rising to around 43 overnight. Northwest wind around 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
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Wednesday49°FChance Rain Showers36% chance of precipitation
A chance of rain showers. Mostly cloudy, with a high near 49. West northwest wind around 16 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
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Wednesday Night38°FCloudy then Slight Chance Rain Showers21% chance of precipitation
A slight chance of rain showers after 1am. Cloudy. Low around 38, with temperatures rising to around 41 overnight. West northwest wind around 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
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Thursday50°FSlight Chance Rain Showers then Mostly Cloudy20% chance of precipitation
A slight chance of rain showers before 8am. Mostly cloudy, with a high near 50. Northwest wind 9 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
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Thursday Night35°FMostly Cloudy
Mostly cloudy, with a low around 35. North wind 3 to 8 mph.
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Friday50°FMostly Sunny2% chance of precipitation
Mostly sunny, with a high near 50. North wind around 3 mph.
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Friday Night30°FPartly Cloudy
Partly cloudy, with a low around 30. Southeast wind around 1 mph.
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Saturday53°FMostly Sunny
Mostly sunny, with a high near 53. South southwest wind 1 to 6 mph.
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Saturday Night34°FMostly Clear
Mostly clear, with a low around 34. West southwest wind around 2 mph.
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Sunday58°FSunny
Sunny, with a high near 58. West southwest wind 2 to 6 mph.
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Sunday Night37°FClear
Clear, with a low around 37. South southwest wind 2 to 6 mph.
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Monday63°FSunny
Sunny, with a high near 63. Southwest wind 6 to 9 mph, with gusts as high as 16 mph.
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Monday Night39°FMostly Clear
Mostly clear, with a low around 39. West northwest wind 1 to 5 mph.
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Tuesday63°FMostly Sunny
Mostly sunny, with a high near 63. North northwest wind 1 to 5 mph.
Issued by the National Weather Service (OAX office), updated .
Portsmouth Hourly Forecast
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Portsmouth Weather Radar
Open the full radar for PortsmouthAbout Portsmouth
- Population (2020 Census)
- 182
- Coordinates
- 41.650, -95.519
- Elevation
- 1,250 ft
- NWS forecast office
- OAX
- Time zone
- America/Chicago
- Sunrise today
- 6:57 AM CST
- Sunset today
- 5:13 PM CST
- Daylight today
- 10 h 16 min
Portsmouth Weather Questions
What is the weather forecast for Portsmouth, Iowa?
Overnight: A slight chance of rain showers between 3am and 5am. Cloudy. Low around 40, with temperatures rising to around 43 overnight. Northwest wind around 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible. Wednesday: A chance of rain showers. Mostly cloudy, with a high near 49. West northwest wind around 16 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Will it rain or snow in Portsmouth this week?
The best chance of precipitation is Wednesday at 36%. Periods with a 30% chance or more: Wednesday (36%).
How warm and how cold will it get in Portsmouth this week?
The warmest day is Monday, with a high near 63°F. The coldest night is Friday Night, with a low near 30°F.
What time are sunrise and sunset in Portsmouth today?
Sunrise is at 6:57 AM CST and sunset is at 5:13 PM CST, for 10 h 16 min of daylight.