What’s the climate like in Portsmouth?
The current climate in Portsmouth features temperatures ranging from a high of 30°C to a low of 6°C throughout the year. 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, New York gets 1142 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 nice 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, rainfall, snow, and UV index per month. The table provides an overview of the average day and night temperatures in degrees Celsius, the total amount of rainfall in millimeters, the total snowfall in centimeters, and the UV index for each month. Rainfall 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) | 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 |
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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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Table of Contents
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.
Average Precipitation per Month in Portsmouth
This graph shows how much rainfall Portsmouth, Ohio, gets on average per month. Rainfall 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 rainfall is measured in millimeters, and the average is calculated based on the recorded rainfall per month from past years.
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 centimeters 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, Ohio. 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, Ohio. 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, Ohio, over the past few years. The total yearly precipitation, measured in millimeters, 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, Ohio, over the past few years. The total yearly snowfall, measured in centimeters, 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.
