Last updated: June 24, 2025
In New Berlin, United States, the average temperature in September is a mild 16°C (62°F). However, be prepared for a temperature range that can dip to a chilly 0°C (32°F) and soar up to a warm 31°C (87°F). Expect approximately 100 mm (4.0 in) of precipitation spread over 10 days, contributing to an average humidity of 78%. Stay comfortable and ready for a variety of weather conditions!
In September in New Berlin, the average temperature is 16°C (62°F). Maximum temperatures can reach 31°C (87°F), while minimums can dip as low as 0°C (32°F). Be prepared for a wide range of weather conditions when traveling during this month.
In New Berlin in September, the precipitation amount is 100 mm (4.0 in) over the course of 10 days.
In New Berlin in September, humidity is 78%. With an average temperature of 16°C (62°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities enjoyable yet slightly sticky. Travelers may find the weather pleasantly mild, though they'll appreciate having light, breathable clothing on hand to stay comfortable while exploring.
In New Berlin 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 New Berlin.
UV Risk Categories
Weather in New Berlin varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in New Berlin, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (24°F) | 82 mm (3.2 inches) | 90% | moderate |
| February Weather | -3°C (27°F) | 95 mm (3.7 inches) | 90% | moderate |
| March Weather | 0°C (33°F) | 87 mm (3.4 inches) | 87% | high |
| April Weather | 7°C (45°F) | 118 mm (4.6 inches) | 88% | very high |
| May Weather | 14°C (57°F) | 122 mm (4.8 inches) | 82% | very high |
| June Weather | 18°C (65°F) | 108 mm (4.3 inches) | 79% | very high |
| July Weather | 21°C (70°F) | 130 mm (5.1 inches) | 78% | very high |
| August Weather | 20°C (68°F) | 114 mm (4.5 inches) | 76% | very high |
| September Weather | 16°C (62°F) | 100 mm (4.0 inches) | 78% | very high |
| October Weather | 11°C (52°F) | 153 mm (6.0 inches) | 84% | high |
| November Weather | 3°C (37°F) | 102 mm (4.0 inches) | 89% | moderate |
| December Weather | -2°C (29°F) | 95 mm (3.7 inches) | 86% | low |