Oak Brook, IL weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Oak Brook now
Loading the National Weather Service forecast…
Oak Brook weather by the hour
Oak Brook weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Oak Brook.
This week in Oak Brook
Sunrise, sunset and moon in Oak Brook
What is the weather usually like in Oak Brook?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 84°F average high
- Januarycoldest month · 15°F average low
- 40.2 inprecipitation per year · 1,021 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Oak Brook: May–June and August–September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station LISLE-MORTON ARBORETUM, IL US (USC00115097), adjusted for the elevation of Oak Brook.
Oak Brook weather month by month
Sunrise and sunset in Oak Brook through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:15 AM | 4:47 PM | 9 h 32 min |
| February | 6:45 AM | 5:26 PM | 10 h 40 min |
| March | 7:01 AM | 6:59 PM | 11 h 58 min |
| April | 6:09 AM | 7:34 PM | 13 h 24 min |
| May | 5:29 AM | 8:06 PM | 14 h 36 min |
| June | 5:14 AM | 8:30 PM | 15 h 15 min |
| July | 5:28 AM | 8:26 PM | 14 h 58 min |
| August | 5:58 AM | 7:53 PM | 13 h 54 min |
| September | 6:30 AM | 7:02 PM | 12 h 32 min |
| October | 7:03 AM | 6:12 PM | 11 h 8 min |
| November | 6:40 AM | 4:32 PM | 9 h 52 min |
| December | 7:10 AM | 4:23 PM | 9 h 12 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Oak Brook?
Oak Brook has a hot-summer humid continental climate. The warmest month is July, with an average high of 84°F (29°C), and the coldest is January, with average lows of 15°F (-10°C).
It gets about 40.2 inches (1,021 mm) of precipitation a year. The wettest month is May and the driest is February.
The best time to visit Oak Brook is May–June and August–September. At 663 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Oak Brook
Weather in towns near Oak Brook
Questions about the weather in Oak Brook
What is the hottest month in Oak Brook?
July, with an average high of 84°F (29°C).
What is the coldest month in Oak Brook?
January, with an average low of 15°F (-10°C).
How much does it rain in Oak Brook?
About 40.2 inches (1,021 mm) a year; the wettest month is May.
Does it snow in Oak Brook?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Oak Brook?
May–June and August–September, when temperatures are most pleasant and rainy days are fewer.
What climate does Oak Brook have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in Oak Brook in November?
Highs average 48°F and lows 30°F, with about 2.8 inches of precipitation.
What time is sunrise in Oak Brook?
Around 6:40 AM in mid-November, and sunset around 4:32 PM. Today’s exact times are shown above.
Where does this Oak Brook weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Oak Brook.
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