Oak Brook Weather in August

During August, Oak Brook experiences high daytime temperatures of 28°C (82°F) and cooler nights around 18°C (64°F). Expect quite a bit of rainfall. Around 121 mm (4.8 in) is typical.

Rainfall in Oak Brook in August

Records from the past 30 years suggest around 11 days of rain, with 121 mm (4.8 in) average for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Oak Brook in August

August in Oak Brook sees highs of 28°C (82°F) and lows of 18°C (64°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 18°C (64°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Oak Brook in August

Expect a lot of sunshine this month, with about 280 hours of sun. These sunny conditions add to the overall experience.

Wind Speed in Oak Brook in August

August sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

If you prefer enjoying temperate temperatures and rain-free days, September typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Oak Brook's climate page.

Oak Brook Temperature in August

Min Temperature 18°C (64°F)  

Max Temperature 28°C (82°F)  

Chance of Rain 35%  

Precipitation 121 mm (4.8 in)  

Rainy days 11 days  

Humidity 71% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 280 hours *  

Percentage Sunshine 66% *  

* Data from: Chicago, the United States of America (16 KM, 10 Miles).

What to Wear in Oak Brook in August

Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Oak Brook in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Oak Brook's climate page.

More climate data for Oak Brook

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Oak Brook climate overview or explore weather in the United States of America.