Last updated: June 24, 2025
In East Troy, United States, the average temperature in September hovers around 19°C (66°F), with a minimum of 2°C (36°F) and a maximum reaching 33°C (92°F). Expect precipitation to total 101 mm (4.0 in) over approximately 9 days, while humidity averages a comfortable 79%. Get ready for a month that offers a mix of mild warmth and occasional rain!
In September in East Troy, the average temperature is 19°C (66°F). The maximum can reach 33°C (92°F) and the minimum can be as low as 2°C (36°F). This diverse climate makes East Troy an ideal destination for travelers looking to experience a range of temperatures and activities.
In East Troy in September, the total precipitation amount is 101 mm (4.0 in), occurring over a span of 9 days.
In East Troy in September humidity is 79%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace, making it feel much warmer than the actual temperature and creating a heavy, sticky atmosphere that can be a bit uncomfortable for traveling.
In East Troy in September, 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 East Troy.
UV Risk Categories
Weather in East Troy varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in East Troy, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 59 mm (2.3 inches) | 85% | moderate |
| February Weather | -4°C (24°F) | 55 mm (2.2 inches) | 85% | moderate |
| March Weather | 3°C (37°F) | 61 mm (2.4 inches) | 85% | high |
| April Weather | 8°C (46°F) | 111 mm (4.4 inches) | 85% | very high |
| May Weather | 15°C (59°F) | 141 mm (5.5 inches) | 78% | very high |
| June Weather | 21°C (70°F) | 112 mm (4.4 inches) | 80% | very high |
| July Weather | 24°C (75°F) | 88 mm (3.5 inches) | 78% | very high |
| August Weather | 22°C (72°F) | 86 mm (3.4 inches) | 76% | very high |
| September Weather | 19°C (66°F) | 101 mm (4.0 inches) | 79% | very high |
| October Weather | 11°C (52°F) | 114 mm (4.5 inches) | 83% | moderate |
| November Weather | 3°C (37°F) | 47 mm (1.9 inches) | 88% | moderate |
| December Weather | -1°C (31°F) | 49 mm (1.9 inches) | 81% | low |