Last updated: June 24, 2025
In April, the average temperature in Oak Brook, United States is a mild 9°C (49°F). However, be prepared for variability, with temperatures ranging from a chilly -7°C (19°F) to a warm 29°C (85°F). Expect about 120 mm (4.7 in) of precipitation over 12 days, contributing to an average humidity of 85%—perfect conditions for cozy indoor activities!
In April in Oak Brook, the average temperature is 9°C (49°F), with maximums reaching up to 29°C (85°F) and minimums dropping as low as -7°C (19°F). This wide range of temperatures makes it essential for travelers to pack accordingly to enjoy all that Oak Brook has to offer.
In Oak Brook in April, the precipitation amount is 120 mm (4.7 in) over a period of 12 days.
In Oak Brook in April humidity is 85%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making every step outside a challenge as the moisture in the air weighs heavily and lingers, transforming even simple outings into a quest for comfort.
In Oak Brook in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Oak Brook.
UV Risk Categories
Weather in Oak Brook varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Oak Brook, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (26°F) | 61 mm (2.4 inches) | 82% | moderate |
| February Weather | -2°C (28°F) | 63 mm (2.5 inches) | 83% | moderate |
| March Weather | 4°C (40°F) | 89 mm (3.5 inches) | 84% | high |
| April Weather | 9°C (49°F) | 120 mm (4.7 inches) | 85% | very high |
| May Weather | 16°C (61°F) | 156 mm (6.1 inches) | 79% | very high |
| June Weather | 22°C (72°F) | 151 mm (6.0 inches) | 82% | very high |
| July Weather | 24°C (76°F) | 116 mm (4.6 inches) | 80% | very high |
| August Weather | 23°C (73°F) | 91 mm (3.6 inches) | 81% | very high |
| September Weather | 20°C (68°F) | 85 mm (3.4 inches) | 80% | very high |
| October Weather | 12°C (55°F) | 131 mm (5.2 inches) | 82% | high |
| November Weather | 4°C (39°F) | 57 mm (2.3 inches) | 88% | moderate |
| December Weather | 1°C (33°F) | 54 mm (2.1 inches) | 84% | low |