Average Monthly Sunshine in Harrow

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

Monthly hours of sunshine

Seasonal sunshine in Harrow varies. It peaks at 219 hours in July and drops to 54 hours in December. The total annual amount of sun is 1675 hours.

Daily hours of sunshine

In Harrow, summer days are longer and more sunny, with daily sunshine hours peaking at 7.3 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.8 hours per day.

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

Harrow enjoys an average of 1675 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

The city of Rome, Italy, experiences 2470 hours of sunshine annually, adding to its charm as a year-round tourist destination.

In contrast, Reykjavík, Iceland, receives only about 1330 hours of sunshine per year, known for its frequently overcast and rainy skies.

Toronto, Canada, sees around 2071 hours of sunshine each year, with especially long, bright summer days.

In Brisbane, Australia, the annual sunshine averages 2999 hours, making it one of Australia’s sunniest cities.

Other climate information

August, Harrow’s wettest month, receives 62 mm of rainfall and has a maximum daytime temperature of 23°C. During the driest month March you can expect a temperature of 12°C.

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