Portsmouth weather in September (Hampshire, United Kingdom)
How is the weather in Portsmouth in September? This guide provides all the details you need.
In September, Portsmouth typically experiences pleasant temperatures and moderate rainfall. September is a summer month. Throughout the daytime, temperatures often hover around 19°C. However, as the sun sets and evening approaches, there's a noticeable cool-down, with temperatures gently dropping to a more temperate 13°C.
Portsmouth in September usually receives moderate rainfall, averaging around 65 mm for the month. Rain is expected on roughly 11 days.
The area experiences a moderate amount of sunshine, with approximately 149 hours of sunlight expected. This makes it neither too gloomy nor overly bright.
In case you lean more towards enjoying temperate temperatures and rain-free days July and August typically offer the most optimal weather. In contrast, January, February and December tend to have less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Portsmouth climate page with graphs.
Portsmouth, monthly averages in September
Min Temperature
13°C
Max Temperature
19°C
Chance of Rain
38%
Precipitation
65 mm
Rainy days
11 days
Humidity
82% *
Sunshine
149 hours *
Percentage Sunshine
44% *
Where to go in the United Kingdom in September
Find out more about the weather in the United Kingdom in September and which places have the best weather conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in Portsmouth in September?
For visitors traveling to Portsmouth, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do in September.
Interested in more climate information?
Weather and Climate provides you with all the information you need about the climate in Portsmouth.
Our site offers climate and forecast data for every country in the world. Are you going to the United Kingdom? On this website you can find historical weather averages for many cities in the United Kingdom. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.
