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Northbrook (IL) Weather and Climate: A Comprehensive Guide

The temperature in Northbrook can vary quite a bit throughout the year. Temperatures can be warm during the warmest months, and very cold during the cooler months. It also experiences much rain/snowfall throughout the year. Let's now guide you through the climate details for a complete overview.

Average maximum day and minimum night temperature

Visitors to Northbrook can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 29°C in July. In January, the coolest month of the year, temperatures drop to a very cold -0°C.

At night, you can expect cooler temperatures, with averages dropping to around -9°C during this month. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Northbrook is known for its substantial rain/snowfall, with annual precipitation reaching 1048 mm. Northbrook can be quite wet during August, receiving approximately 117 mm of precipitation over 11 rainy days.

In contrast January, experiences much drier conditions, with 50 mm of snowfall, spread across 11 snowy days. For more details, please visit our Northbrook Precipitation page.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

Northbrook can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 10.6 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 3.6 hours of sunlight per day. Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: Chicago, the United States of America (17 KM, 10 Miles).

Daily hours of sunshine

Data from: Chicago, the United States of America (17 KM, 10 Miles).

Forecast for Northbrook (IL)

Wed   Dec 25
4°C | -1°C
NE 3 m/s
overcast and no rain

overcast and no rain

Thu   Dec 26
9°C | 2°C
SE 3 m/s
0.2 mm
overcast and  chance of slight rain

overcast and chance of slight rain

Fri   Dec 27
10°C | 5°C
SE 5 m/s
2.6 mm
overcast and rain

overcast and rain

The best time of year to visit Northbrook in the United States of America

During the months of May, June and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is summer in Northbrook?
    The hottest season / summer takes place in June, July, August and September.
  • Which is the warmest month in Northbrook?
    July has an average maximum temperature of 29°C and is the warmest month of the year.
  • Which is the coldest month in Northbrook?
    The coldest month is January with an average maximum temperature of -0°C.
  • Which is the wettest month in Northbrook?
    August tops the wettest month list with 117 mm of rainfall.
  • Which is the driest month in Northbrook?
    January is the driest month with 50 mm of precipitation.
  • Which is the sunniest month in Northbrook?
    July is the sunniest month with an average of 319 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.