Northbrook (IL) Sunshine Hours by Month

Sunshine is key to understanding how a place experiences its seasons. This page shows the total number of hours of direct sunlight per month and the average hours per day in Northbrook, Illinois, United States of America. These averages rely on historical data collected over 30 years, from 1990 to 2020.

Monthly hours of sunshine

Seasonal sunshine in Northbrook varies. It peaks at 319 hours in July and drops to 107 hours in December. The total annual amount of sun is 2509 hours.

Daily hours of sunshine

For those who appreciate different seasons, Northbrook serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 10.6 hours of sunshine daily, and embrace the darker days in December, offering only 3.6 hours of daily sunlight.

Average percent of sunshine

On average the sun shines 69% of the time during the day in July, the highest percentage of any month. December has the lowest percentage at 37%.

Northbrook enjoys an average of 2509 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

In Barcelona, Spain, there are 2530 hours of sunshine annually and is a city that can be visited year-round.

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

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

Melbourne, Australia, has 2380 hours of sunshine annually, with its famous “four seasons in a day” weather pattern.

August, Northbrook’s wettest month, receives 108 mm (4.3 in) of rainfall and has a maximum daytime temperature of 28°C (82°F). During the driest month January you can expect a temperature of 0°C (32°F).

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