Portsmouth Weather and Climate: A Comprehensive Guide
The weather in Portsmouth is characterized by a steady average temperature throughout the year.
It receives a moderate amount of precipitation.
Now, let’s break down all the climate details for a clearer picture.
Average maximum day and minimum night temperature
In Portsmouth temperatures are generally consistent throughout the year. On average, daytime temperatures range from a comfortable 29°C in September to a comfortable 27°C in February.
Nighttime temperatures can drop, with average lows reaching 24°C in February. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
On average, Portsmouth receives a reasonable amount of rainfall, with an annual precipitation of 973 mm. The seasons in Portsmouth, bring significant changes in precipitation. The wettest month, October, receives high rainfall, with an average of 137 mm of precipitation. This rainfall is distributed across 19 rainy days. In contrast, the driest month, March, experiences much less rainfall, totaling 33 mm over 15 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Portsmouth Precipitation page.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
Portsmouth enjoys sunny spells year-round. April sees up to 8.2 hours of daily sunshine, perfect for a sunny trip. December, the least sunny month, still offers a generous 6.3 hours of sun despite this cloudier time of the year. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Average humidity
The relative humidity is high throughout the year in Portsmouth.
The city experiences its highest humidity in November, reaching 74%. In April, the humidity drops to its lowest level at 64%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
partly cloudy and no rain partly cloudy and small chance of rain partly cloudy and rainForecast for Portsmouth
5 m/s
5 m/s
7 m/s
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit Portsmouth in Dominica
The best time to visit is during the drier months: January, February, March and April.Other facts from our historical weather data:
September has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is February with an average maximum temperature of 27°C.
October tops the wettest month list with 137 mm of rainfall.
March is the driest month with 33 mm of precipitation.
April is the sunniest month with an average of 245 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.
