Last updated: June 24, 2025
In East Rochester, United States, the average temperature in September hovers around 19°C (67°F), with minimums dipping to 4°C (40°F) and maximums reaching a warm 34°C (93°F). Expect an average precipitation of 117 mm (4.6 in) over about 9 days, complemented by a comfortable average humidity of 77%. Whether you’re planning a cozy retreat or a sunny adventure, be prepared for a range of delightful weather!
In September in East Rochester, the average temperature is 19°C (67°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop to as low as 4°C (40°F). Travelers should prepare for a wide range of temperatures and pack accordingly.
In East Rochester in September, the total precipitation amount is 117 mm (4.6 in) spread over a period of 9 days.
In East Rochester in September, humidity is 77%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel slightly more challenging as the air clings to your skin, turning every step into a leisurely stroll through a sauna.
In East Rochester 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 Rochester.
UV Risk Categories
Weather in East Rochester varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in East Rochester, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 95 mm (3.7 inches) | 88% | moderate |
| February Weather | 1°C (34°F) | 113 mm (4.5 inches) | 88% | moderate |
| March Weather | 5°C (41°F) | 103 mm (4.1 inches) | 87% | high |
| April Weather | 10°C (51°F) | 133 mm (5.2 inches) | 87% | very high |
| May Weather | 16°C (62°F) | 136 mm (5.4 inches) | 81% | very high |
| June Weather | 21°C (70°F) | 136 mm (5.3 inches) | 83% | very high |
| July Weather | 24°C (75°F) | 135 mm (5.3 inches) | 82% | very high |
| August Weather | 22°C (73°F) | 88 mm (3.5 inches) | 76% | very high |
| September Weather | 19°C (67°F) | 117 mm (4.6 inches) | 77% | very high |
| October Weather | 14°C (57°F) | 124 mm (4.9 inches) | 82% | high |
| November Weather | 5°C (42°F) | 97 mm (3.8 inches) | 89% | moderate |
| December Weather | 2°C (36°F) | 99 mm (3.9 inches) | 86% | low |