Last updated: June 24, 2025
In September, the average temperature in New Berlin, United States is a pleasant 19°C (67°F). Expect temperatures to range from a cool 2°C (36°F) at night to a warm 33°C (91°F) during the day. With 128 mm (5.0 in) of precipitation spread over about 10 days, it's wise to prepare for some rain. The average humidity sits at a comfortable 66%, making this a balanced month for enjoying the local scenery.
In September in New Berlin, the average temperature is 19°C (67°F), with maximums reaching 33°C (91°F) and minimums dropping as low as 2°C (36°F). This wide range of temperatures makes New Berlin a versatile destination for travelers, so be sure to pack for both warm and cool conditions.
In New Berlin in September, the total precipitation amount is 128 mm (5.0 in) recorded over a span of 10 days.
In New Berlin in September humidity is 66%. With an average temperature of 19°C (67°F), this humidity feels like a warm blanket wrapping around you, making it mildly uncomfortable for traveling, as you may find yourself needing to frequently stop for hydration and to seek shade from the sun.
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 | -1°C (30°F) | 70 mm (2.8 inches) | 87% | moderate |
| February Weather | 0°C (33°F) | 100 mm (3.9 inches) | 85% | moderate |
| March Weather | 4°C (40°F) | 90 mm (3.5 inches) | 85% | high |
| April Weather | 10°C (50°F) | 112 mm (4.4 inches) | 83% | very high |
| May Weather | 16°C (61°F) | 133 mm (5.3 inches) | 75% | very high |
| June Weather | 21°C (70°F) | 102 mm (4.0 inches) | 73% | very high |
| July Weather | 24°C (75°F) | 145 mm (5.7 inches) | 65% | very high |
| August Weather | 23°C (74°F) | 115 mm (4.5 inches) | 62% | very high |
| September Weather | 19°C (67°F) | 128 mm (5.0 inches) | 66% | very high |
| October Weather | 13°C (57°F) | 130 mm (5.1 inches) | 79% | high |
| November Weather | 5°C (42°F) | 94 mm (3.7 inches) | 87% | moderate |
| December Weather | 2°C (35°F) | 90 mm (3.5 inches) | 85% | low |