What’s the climate like in Portsmouth?
The current climate of Portsmouth features average monthly temperatures ranging from highs of 22°C during the day to lows of 9°C. The average yearly temperature is around 15°C. At night, temperatures in the colder months average around 3°C and in the warmer months around 14°C.
The highest temperature recorded in Portsmouth in recent years was 32°C in August 2022. The lowest daytime temperature recorded was -1°C in February 2018.
On average, Portsmouth gets 747 mm of precipitation each year. Of this, about 1,7 cm is snowfall. For comparison, London gets 701 mm of precipitation each year.
Curious about the climate in other parts of England? Check out the weather and climate in places like London, Edinburgh, Cornwall, or have a look at other destinations in England.
Best time to visit Portsmouth?
The best time to visit Portsmouth for sunny weather is June through September. During this period, you'll have good temperatures and not too much rain, making it a great time to visit Portsmouth. In the other months of the year, there's too much rain or the temperature isn't ideal for a visit if you want sunny and pleasant weather.
Climate Table of Portsmouth
The climate table of Portsmouth shows the average temperatures, precipitation, snow, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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| Temp. max (°C) | 9 | 9 | 11 | 13 | 17 | 20 | 22 | 21 | 20 | 16 | 12 | 10 |
| Temp. min (°C) | 4 | 4 | 5 | 6 | 10 | 13 | 15 | 15 | 13 | 10 | 7 | 6 |
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| Precipitation (mm) | 85 | 59 | 53 | 38 | 40 | 47 | 41 | 68 | 47 | 93 | 91 | 85 |
| Snow (cm) | 0,1 | 0,3 | 1,1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0,1 | 0,1 |
| UV Index | 2 | 3 | 4 | 6 | 7 | 7 | 7 | 6 | 5 | 3 | 2 | 1 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 15°C
- Highest temperature: 22°C in July
- Lowest temperature: 9°C in January and February
- Precipitation*: 747 mm per year, averaging 62 mm per month
- Snowfall: 1,7 cm per year
- Driest months: 38 mm in April, 40 mm in May and 41 mm in July
- Wettest months: 93 mm in October, 91 mm in November and 85 mm in January
*Precipitation is measured as a combination of rain, snow, and hail
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Table of Contents
Average Temperature per Month in Portsmouth
This graph shows the average maximum temperatures per month in Portsmouth, England. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Portsmouth
This graph shows how much precipitation Portsmouth, England, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average Snowfall per Month in Portsmouth
This graph shows how much snow Portsmouth, England, gets on average per month. The amount of snowfall is measured in centimetres and the average is calculated based on the recorded snowfall per month from past years.
Average UV Index per Month in Portsmouth
This graph shows the average UV index per month in Portsmouth, England. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in Portsmouth
This graph shows the average yearly temperature in Portsmouth, England. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Portsmouth
This chart shows the total yearly precipitation in Portsmouth, England, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Total Yearly Snowfall in Portsmouth
This chart shows the total yearly snowfall in Portsmouth, England, over the past few years. The total yearly snowfall, measured in centimetres, is the sum of all the snow that fell in the twelve months of that year.
Weather experiences in Portsmouth
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Average Weather in Portsmouth by Month
Click on a month below to see detailed weather info for Portsmouth. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
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