Portsmouth Climate by Month
The temperature in Portsmouth can vary greatly throughout the year.
The temperatures shift from pleasant
to cold.
It receives a moderate amount of precipitation.
Now, let’s explore all the climate details to give you a full picture.
Average day and night temperature
Depending on the time of the year, temperatures range from pleasant to chilly in Portsmouth. On average, daytime temperatures range from a pleasant 21°C in July to a chilly 9°C in February. Nighttime temperatures can drop, with averages reaching 4°C in February.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Generally, Portsmouth has a moderate amount of precipitation, averaging 844 mm of rainfall annually. The amount of precipitation varies moderately throughout the year. The wettest month, November, sees around 94 mm of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, March, still receives a respectable 54 mm of rainfall.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
In Portsmouth, summer days are longer and more sunny, with daily sunshine hours peaking at 7.4 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.8 hours per average day.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Portsmouth.
Relative humidity over the year
The best time of year to visit Portsmouth in the United Kingdom
During the months of July and August you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
July has an average maximum temperature of 21°C and is the warmest month of the year.
The coldest month is February with an average maximum temperature of 9°C.
November tops the wettest month list with 94 mm of rainfall.
March is the driest month with 54 mm of precipitation.
July is the sunniest month with an average of 222 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
