What’s the climate like in Portsmouth?
The current climate in Portsmouth features temperatures ranging from a high of 32°C to a low of 29°C throughout the year. The average yearly temperature is around 31°C. At night, temperatures in the colder months average around 21°C and in the warmer months around 25°C.
The highest temperature recorded in Portsmouth in recent years was 37°C in August 2023. The lowest daytime temperature recorded was 24°C in February 2021.
On average, Portsmouth receives 2468 mm of precipitation each year. For comparison, New York gets 1142 mm of precipitation annually.
Best time to visit Portsmouth?
The best time to visit Portsmouth for mild to warm weather is January up to July and December. You might get some rain, but the temperatures are just right to explore Portsmouth.
Climate Table of Portsmouth
The climate table of Portsmouth shows the average temperatures, rainfall, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. max (°C) | 29 | 29 | 29 | 29 | 30 | 31 | 31 | 31 | 32 | 31 | 30 | 29 |
| Temp. min (°C) | 22 | 23 | 23 | 24 | 25 | 25 | 25 | 25 | 24 | 24 | 23 | 22 |
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| Precipitation (mm) | 143 | 85 | 126 | 141 | 115 | 176 | 168 | 268 | 369 | 332 | 369 | 176 |
| UV Index | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 |
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: 31°C
- Highest temperature: 32°C in September
- Lowest temperature: 29°C in January, February, March, April and December
- Precipitation: 2468 mm per year, averaging 206 mm per month
- Driest months: 85 mm in February, 115 mm in May and 126 mm in March
- Wettest months: 369 mm in September, 369 mm in November and 332 mm in October
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Table of Contents
Average Temperature per Month in Portsmouth
This graph shows the average maximum temperatures per month in Portsmouth, Dominica. 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, Dominica, 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 UV Index per Month in Portsmouth
This graph shows the average UV index per month in Portsmouth, Dominica. 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, Dominica. 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, Dominica, 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.
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.
