Last updated: June 24, 2025
In Glen Ellyn, United States, the average temperature in August is a pleasant 23°C (73°F). However, temperatures can vary significantly, with lows of 10°C (49°F) and highs reaching 34°C (94°F). Expect around 92 mm (3.6 in) of precipitation spread over 11 days, resulting in an average humidity of 81%. Whether you're enjoying sun-soaked days or brief showers, this month offers a dynamic climate experience!
In August in Glen Ellyn, the average temperature is 23°C (73°F). The maximum can reach 34°C (94°F) and the minimum can be as low as 10°C (49°F). It's a great time to travel, as the weather is generally warm and comfortable for outdoor activities.
In Glen Ellyn in August, the precipitation amount is 92 mm (3.6 in) spread over 11 days.
In Glen Ellyn in August, humidity is 81%. With an average temperature of 23°C (73°F), this humidity feels like a heavy blanket wrapping around you, making every step feel more laborious while traveling and causing you to constantly seek out shade or a cool breeze for relief.
In Glen Ellyn in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Glen Ellyn.
UV Risk Categories
Weather in Glen Ellyn varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Glen Ellyn, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (26°F) | 61 mm (2.4 inches) | 82% | moderate |
| February Weather | -2°C (28°F) | 60 mm (2.4 inches) | 83% | moderate |
| March Weather | 4°C (39°F) | 79 mm (3.1 inches) | 84% | high |
| April Weather | 9°C (48°F) | 115 mm (4.5 inches) | 85% | very high |
| May Weather | 15°C (60°F) | 164 mm (6.4 inches) | 79% | very high |
| June Weather | 21°C (71°F) | 134 mm (5.3 inches) | 82% | very high |
| July Weather | 24°C (75°F) | 105 mm (4.1 inches) | 80% | very high |
| August Weather | 23°C (73°F) | 92 mm (3.6 inches) | 81% | very high |
| September Weather | 20°C (68°F) | 85 mm (3.3 inches) | 80% | very high |
| October Weather | 12°C (54°F) | 127 mm (5.0 inches) | 82% | high |
| November Weather | 4°C (39°F) | 55 mm (2.2 inches) | 88% | moderate |
| December Weather | 0°C (33°F) | 53 mm (2.1 inches) | 84% | low |