Oak Park (IL) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Oak Park.
Climate overview of Oak Park
Temperatures in Oak Park, Illinois, United States of America, vary greatly throughout the year. July is the hottest month at 29°C (84°F), while January is the coldest at 0°C (32°F).
The city receives considerable rain/snowfall, with around 1098 mm (43 in) annually. August is the wettest month. It has warm summers and very cold winters. July is the sunniest month, averaging 10.6 hours of sunshine per day.
Oak Park Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Oak Park - and find the best time to visit.
Monthly Temperature in Oak Park
The climate in Oak Park is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in July to a very cold 0°C (32°F) in the coolest month, January.
Nights vary from 19°C (66°F) in July to around -8°C (18°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Oak Park
Oak Park has a notably wet climate with abundant precipitation, recording 1098 mm (43 in) of rain/snowfall per year. The climate in Oak Park shows significant variation throughout the year. Expect high rainfall in August, the wettest month, with an average of 133 mm (5.2 in) of precipitation over 10 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 53 mm (2.1 in) of snowfall over 10 snowy days. For more details, please visit our Oak Park 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 Oak Park
For those who appreciate different seasons, Oak Park 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.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Oak Park by Month
The relative humidity is high throughout the year in Oak Park.
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 Oak Park
The mean wind speed varies between 4 m/s (8 knots) and 6 m/s (12 knots) throughout the year. It is lowest in June, July, August and September and highest during January, March and April. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Oak Park
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: September
- Warmest weather: July and August
- Most sunshine: June and July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -8°C (18°F).
Frequently asked questions about the climate in Oak Park
What is the best time to visit Oak Park?
September typically offers the most optimal weather in Oak Park. In contrast, January, February, March, November and December tend to have less optimal conditions. Oak Park has warm summers and very cold winters.
What temperatures can I expect in Oak Park?
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 Oak Park get?
Annual rainfall is around 1098 mm (43 in). August is the wettest month with 133 mm (5.2 in), while January is the driest with 53 mm (2.1 in).
How sunny is Oak Park?
Oak Park 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, Oak Park enjoys abundant sunshine.
Oak Park 3-Day Forecast
Oak Park (IL) 3-Day Forecast
Oak Park on the map
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