Hillside (IL) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Hillside.
Climate overview of Hillside
Hillside, Illinois, United States of America, sees big temperature differences between seasons, with July peaking at 29°C (84°F) and January dropping to 0°C (32°F).
Rain/snowfall is high, totalling around 1053 mm (41 in) per year. August is the wettest month and January the driest. The most sunshine falls in July, with an average of 10.6 hours of daily sunshine.
Hillside Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hillside — and find the best time to visit.
Monthly Temperature in Hillside
Visitors to Hillside can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 29°C (84°F) in July, the warmest time of the year, to a very cold 0°C (32°F) during cooler months like January.
At night, you can expect temperatures ranging from 19°C (66°F) in July to around -8°C (18°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Hillside
Hillside is known for its substantial rain/snowfall, with annual precipitation reaching 1053 mm (41 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, August it receives high rainfall, averaging 125 mm (4.9 in) of precipitation, recorded across 11 rainy days. In contrast, the driest month January brings less snowfall, with 51 mm (2 in) over 11 snowy days. For more details, please visit our Hillside Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Hillside
Seasonal changes in sunshine hours are quite dramatic in Hillside. While July receives considerable daily sunshine with up to 10.6 hours, December marks the darkest time of the year, where sunshine is scarce with only 3.6 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Hillside by Month
The relative humidity is high throughout the year in Hillside.
The city experiences its highest humidity in December, reaching 76%. In May, 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
Wind Speed in Hillside
The mean wind speed over the year ranges from 4 m/s (8 knots) in June, July, August and September to 6 m/s (12 knots) in January, March and April. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Hillside
The weather does bring rainfall during this period, between 87 mm (3.4 in) and 125 mm (4.9 in). Need help choosing your next travel destination? We offer a specialized tool that matches you with locations based on your weather preferences. Explore destinations that suit your climate preferences.
Frequently asked questions about the climate in Hillside
What is the best time to visit Hillside?
September typically offers the most optimal weather in Hillside. In contrast, January, February, March, November and December tend to have less optimal conditions.
What temperatures can I expect in Hillside?
Daytime highs range from 0°C (32°F) in January to 29°C (84°F) in July. Nighttime lows range from -8°C (18°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Hillside get?
Annual rainfall is around 1053 mm (41 in). August is the wettest month with 125 mm (4.9 in), while January is the driest with 51 mm (2 in).
How sunny is Hillside?
Hillside receives around 2,509 hours of sunshine per year. July is the sunniest month with 319 hours, while December is the cloudiest with just 107 hours. Overall, Hillside enjoys abundant sunshine.
Hillside 3-Day Forecast
Hillside (IL) 3-Day Forecast
Hillside on the map
Hillside is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.