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Portsmouth High School Weather Forecast
| THIS AFTERNOON | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY |
 |  |  |  |  | |  |  | | |  | |
| Chance of T-Storm | Chance of T-Storm | Mostly Cloudy | Chance of Showers | Showers | Chance of Showers | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Clear |
| Hi: 69°FHi: 21°C | Lo: 65°FLo: 18°C | Hi: 71°FHi: 22°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 80°FHi: 27°C Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C Lo: 61°FLo: 16°C | Hi: 71°FHi: 22°C Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C Lo: 60°FLo: 16°C | Hi: 71°FHi: 22°C Lo: 60°FLo: 16°C |
| POP: 100% | POP: 70% | POP: 50% | POP: 70% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1003 AM EDT Tue Sep 01 2026 
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Issued: 722 AM EDT Tue Sep 1 2026
Key Messages
- Widespread rain today, possibly heavy at times. Watching for the potential for localized urban and poor-drainage flooding.
- Cloudy but drier on Wednesday with decreasing shower chances. Precipitation chances return Thursday with an increasing chance for showers and thunderstorms throughout the day.
- Improving weather Friday and into the holiday weekend. Other than a spot diurnal shower each day, dry weather prevails with a mix of clouds and sun. Cooler than normal with highs in the 70s...