The temperatures in Portsmouth in September are usually low and can range between 13°C and 18°C.
You can expect about 3 to 8 days of rain in Portsmouth during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Portsmouth in September 2024.
If you’re planning to visit Portsmouth in the near future, we highly recommend that you review the 14 day weather forecast for Portsmouth before you arrive.
Temperatures
18° / 13°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
68
mm
Sun Hours
9.7
Hrs
