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Portsmouth, IA 7-Day Weather Forecast
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Portsmouth Weather Forecast
Portsmouth, IA Weather Forecast Date: 1026 PM CST Tue Mar 03 2026
Weather forecast for Portsmouth, IA
Tonight Lo: 39°F Lo: 4°C |
Tonight... Mostly cloudy. A slight chance of rain. Near steady temperature in the upper 30s. Northeast winds around 5 mph. Chance of rain 20%. |
Wed Hi: 51°FHi: 11°C Lo: 35°F Lo: 2°C |
Wednesday... Mostly cloudy. A slight chance of rain in the afternoon. Highs in the lower 50s. East winds around 5 mph. Chance of rain 20%. |
Thu Hi: 65°FHi: 18°C Lo: 49°F Lo: 9°C |
Thursday... Sunny. Not as cool with highs in the mid 60s. South winds 5 to 10 mph. |
Fri Hi: 69°FHi: 21°C Lo: 31°F Lo: -1°C |
Friday... A slight chance of thunderstorms. Rain. Highs in the upper 60s. Chance of rain 90%. |
| Sat Hi: 51°FHi: 11°C Lo: 35°F Lo: 2°C |
Saturday... Mostly sunny. Much cooler with highs in the lower 50s. |
| Sun Hi: 65°FHi: 18°C Lo: 39°F Lo: 4°C |
Sunday... Mostly sunny. Not as cool with highs in the mid 60s. |
| Mon Hi: 69°FHi: 21°C Lo: 45°F Lo: 7°C |
Monday... Sunny. Highs in the upper 60s. |
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