Average Monthly Sunshine in Portsmouth (NH)

The graphs on this page shows the average number of hours per month and per day that Portsmouth receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

Monthly hours of sunshine

Seasonal sunshine in Portsmouth varies. It peaks at 295 hours in July and drops to 127 hours in November. The total annual amount of sun is 2520 hours.

Daily hours of sunshine

In Portsmouth, summer days are longer and more sunny, with daily sunshine hours peaking at 9.8 hours in July. As the darker season arrives, the brightness of the sun becomes less. November sees a soft sun for only 4.2 hours.

Portsmouth’s total hours of sunshine compared to other major cities

Portsmouth enjoys an average of 2520 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

Athens, Greece, enjoys 2769 hours of sunshine each year, making it one of the sunniest destinations in the Mediterranean region.

Boston, USA, enjoys 2629 hours of sunshine annually, with distinct seasons and many bright, sunny days.

Osaka, Japan, experiences 2010 hours of sunshine annually, with bright, sunny weather in spring and autumn.

In Tokyo, Japan, the average annual sunshine is 1930 hours, with sunny periods between rainy seasons.

Other climate information

June, Portsmouth’s wettest month, receives 110 mm of rainfall and has a maximum daytime temperature of 23°C. During the driest month January you can expect a temperature of 1°C.

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Portsmouth Precipitation page.