Last updated: June 24, 2025
In September, the average temperature in New Glarus, United States hovers around 19°C (66°F). You'll experience a range that can dip to a chilly 3°C (37°F) or soar to a warm 33°C (91°F). Expect about 116 mm (4.6 in) of precipitation spread over 10 days and an average humidity of 79%, making for a distinctly moist atmosphere.
In September in New Glarus, the average temperature is 19°C (66°F). Maximums can reach 33°C (91°F) and minimums can be as low as 3°C (37°F). This makes it an ideal time for travelers to experience a range of outdoor activities, from enjoying warm days to cool evenings.
In New Glarus in September, the total precipitation amount is 116 mm (4.6 in) over a span of 10 days.
In New Glarus 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 New Glarus 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 Glarus.
UV Risk Categories
Weather in New Glarus varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in New Glarus, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 54 mm (2.1 inches) | 85% | moderate |
| February Weather | -5°C (23°F) | 56 mm (2.2 inches) | 85% | moderate |
| March Weather | 3°C (37°F) | 60 mm (2.4 inches) | 85% | high |
| April Weather | 8°C (47°F) | 96 mm (3.8 inches) | 85% | very high |
| May Weather | 16°C (60°F) | 139 mm (5.5 inches) | 78% | very high |
| June Weather | 22°C (71°F) | 127 mm (5.0 inches) | 80% | very high |
| July Weather | 24°C (75°F) | 83 mm (3.3 inches) | 78% | very high |
| August Weather | 22°C (72°F) | 107 mm (4.2 inches) | 76% | very high |
| September Weather | 19°C (66°F) | 116 mm (4.6 inches) | 79% | very high |
| October Weather | 11°C (52°F) | 114 mm (4.5 inches) | 83% | moderate |
| November Weather | 3°C (37°F) | 43 mm (1.7 inches) | 88% | moderate |
| December Weather | -1°C (30°F) | 47 mm (1.9 inches) | 81% | low |