Last updated: June 24, 2025
In Glen Allen, United States, the average temperature in September hovers around 23°C (73°F), making it a pleasant time to explore. However, be prepared for a range of temperatures, as it can dip to a minimum of 7°C (45°F) and soar to a maximum of 38°C (100°F). With an average precipitation of 97 mm (3.8 in) spread over 10 days, don't forget your umbrella! The humidity is relatively high at 75%, so staying hydrated is key.
In September in Glen Allen, the average temperature is 23°C (73°F). Maximums can reach 38°C (100°F), and minimums can be as low as 7°C (45°F). This variation makes it essential for travelers to pack both lightweight clothing for the warm days and warmer layers for the cooler nights.
In Glen Allen in September, the total precipitation amount is 97 mm (3.8 in) over a span of 10 days.
In Glen Allen in September, humidity is 75%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, making travel slightly uncomfortable yet invigorating as the air wraps around you, creating a sense of walking through a lush, tropical paradise.
In Glen Allen in September, 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 Allen.
UV Risk Categories
Weather in Glen Allen varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Glen Allen, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (40°F) | 64 mm (2.5 inches) | 84% | moderate |
| February Weather | 7°C (45°F) | 96 mm (3.8 inches) | 84% | high |
| March Weather | 10°C (50°F) | 75 mm (2.9 inches) | 84% | high |
| April Weather | 15°C (60°F) | 106 mm (4.2 inches) | 82% | very high |
| May Weather | 20°C (69°F) | 105 mm (4.1 inches) | 82% | very high |
| June Weather | 24°C (76°F) | 129 mm (5.1 inches) | 83% | very high |
| July Weather | 27°C (81°F) | 102 mm (4.0 inches) | 79% | very high |
| August Weather | 26°C (78°F) | 172 mm (6.8 inches) | 77% | very high |
| September Weather | 23°C (73°F) | 97 mm (3.8 inches) | 75% | very high |
| October Weather | 17°C (64°F) | 122 mm (4.8 inches) | 81% | high |
| November Weather | 10°C (49°F) | 72 mm (2.8 inches) | 87% | moderate |
| December Weather | 6°C (44°F) | 93 mm (3.7 inches) | 85% | moderate |