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What’s the climate like in Portsmouth?

The current climate of Portsmouth features average monthly temperatures ranging from highs of 30°C during the day to lows of 6°C. The average yearly temperature is around 20°C. At night, temperatures in the colder months average around -4°C and in the warmer months around 20°C.

The highest temperature recorded in Portsmouth in recent years was 36°C in August 2016. The lowest daytime temperature recorded was -13°C in January 2014.

On average, Portsmouth gets 1515 mm of precipitation each year. Of this, about 35 cm is snowfall. For comparison, London gets 701 mm of precipitation each year.

Best time to visit Portsmouth?

The best time to visit Portsmouth for sunny weather is July through October. 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.

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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
Temp. max (°C) 6 9 14 20 26 28 30 29 27 21 14 9
Temp. min (°C) -3 -1 2 8 14 18 20 19 16 10 2 0
Precipitation
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Precipitation (mm) 170 198 111 124 136 202 106 112 64 111 69 112
Snow (cm) 7,6 14 9,4 0,7 0 0 0 0 0 0 0,2 2,7
UV Index 2 4 6 6 8 7 7 7 6 4 3 2

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: 20°C
  • Highest temperature: 30°C in July
  • Lowest temperature: 6°C in January
  • Precipitation*: 1515 mm per year, averaging 126 mm per month
  • Snowfall: 35 cm per year
  • Driest months: 64 mm in September, 69 mm in November and 106 mm in July
  • Wettest months: 202 mm in June, 198 mm in February and 170 mm in January

*Precipitation is measured as a combination of rain, snow, and hail

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Average Temperature per Month in Portsmouth

This graph shows the average maximum temperatures per month in Portsmouth, Ohio. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.

Temperature per Month in Portsmouth, Ohio,

Average Precipitation per Month in Portsmouth

This graph shows how much precipitation Portsmouth, Ohio, 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.

Precipitation per Month in Portsmouth, Ohio,

Average Snowfall per Month in Portsmouth

This graph shows how much snow Portsmouth, Ohio, 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.

Snowfall per Month in Portsmouth, Ohio,

Average UV Index per Month in Portsmouth

This graph shows the average UV index per month in Portsmouth, Ohio. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.

UV Index per Month in Portsmouth, Ohio,

Yearly Temperature in Portsmouth

This graph shows the average yearly temperature in Portsmouth, Ohio. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.

Yearly Temperature in Portsmouth, Ohio,

Total Yearly Precipitation in Portsmouth

This chart shows the total yearly precipitation in Portsmouth, Ohio, 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.

Yearly Precipitation in Portsmouth, Ohio,

Total Yearly Snowfall in Portsmouth

This chart shows the total yearly snowfall in Portsmouth, Ohio, 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.

Yearly Snowfall in Portsmouth, Ohio,

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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