See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
20°
Clear
Feels Like: 16°
Min: 15°
Max: 29°
The next few hours will be clear, with today reaching 29°C and dropping to 16°C. The coming days will be clear throughout the day.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:53
Sunrise
19:04
Sunset
Moon
Waxing Crescent
12:32
Moonrise
21:22
Moonset
Daily Forecast
Today
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Air Quality Data Available
Upgrade to access real-time air quality data for Portsmouth.
Resources
UV Index
Humidity
Weather in Portsmouth today, September 16, 2026
Sunshine leads the day in Portsmouth on September 16, 2026, with a patch of cloud building near 12:00. The broader outlook stays fair despite that temporary thickening. The morning looks comparatively open, with cloud near 15% around 11:00. Early outdoor plans have a better chance of staying dry and bright.
The temperature range runs from about 15°C up to 29°C. The air stays humid, with relative humidity between 39% and 84% and the peak around 08:00. A lighter breeze peaks around 17:00 near 3.9 km/h.
Through the afternoon skies look more workable, with cloud near 25% around 12:00. Later outdoor plans have a clearer window than the morning may have suggested. Expect visibility near 16.1 km, with poorer spells close to 16.0 km. Daylight runs from 06:53 to 19:04, lasting 12 hours 10 minutes of sunlight today.
Taken together, settled sunshine in Portsmouth on September 16, 2026 makes outdoor timing easier, with highs near 29°C.
Frequently asked questions about weather in Portsmouth
How warm does it get in Portsmouth?
The warmest month in Portsmouth is July, with average high temperatures of 31°C. The average temperature during this period is around 27°C.
How cold does it get in Portsmouth?
The coldest month in Portsmouth is January, with average low temperatures of 2°C. The average temperature during this period is around 6°C.
What is the wettest time of year in Portsmouth?
The wettest month in Portsmouth is July, with an average of 150mm of precipitation.
What is the driest time of year in Portsmouth?
The driest month in Portsmouth is November, with an average of 67mm of precipitation.
Explore more weather forecasts
- Norfolk, Virginia
- New York City, New York
- Chesapeake, Virginia
- Los Angeles, California
- Portsmouth Heights, Virginia
- Brooklyn, New York
- Newport News, Virginia
- Chicago, Illinois
- Hampton, Virginia
- Houston, Texas
- East Hampton, Virginia
- Queens, New York
- Suffolk, Virginia
- Phoenix, Arizona
- Virginia Beach, Virginia
- Philadelphia, Pennsylvania
