Last updated: June 24, 2025
In Mayville, United States, the average temperature in September is a pleasant 18°C (64°F). However, visitors should be prepared for temperature fluctuations, as the minimum can drop to 0°C (33°F) and the maximum can reach 34°C (94°F). During this month, expect around 83 mm (3.3 in) of precipitation spread over 10 days, and a relatively high average humidity of 80%, making for a humid yet comfortable experience.
In September in Mayville, the average temperature is 18°C (64°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 0°C (33°F). This varied climate makes it essential for travelers to pack for both warm and cool conditions.
In Mayville in September, the total precipitation amount is 83 mm (3.3 in) over a span of 10 days.
In Mayville in September humidity is 80%. With an average temperature of 18°C (64°F), this humidity feels like a warm, damp blanket wrapping around you, making travel a bit more exhausting as the air thickens and the heat clings to your skin.
In Mayville in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Mayville.
UV Risk Categories
Weather in Mayville varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mayville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 62 mm (2.5 inches) | 88% | low |
| February Weather | -3°C (26°F) | 65 mm (2.6 inches) | 87% | moderate |
| March Weather | 2°C (35°F) | 66 mm (2.6 inches) | 85% | moderate |
| April Weather | 7°C (45°F) | 96 mm (3.8 inches) | 86% | very high |
| May Weather | 14°C (58°F) | 99 mm (3.9 inches) | 80% | very high |
| June Weather | 20°C (68°F) | 103 mm (4.1 inches) | 80% | very high |
| July Weather | 23°C (73°F) | 80 mm (3.1 inches) | 80% | very high |
| August Weather | 21°C (71°F) | 93 mm (3.7 inches) | 80% | very high |
| September Weather | 18°C (64°F) | 83 mm (3.3 inches) | 80% | high |
| October Weather | 11°C (53°F) | 109 mm (4.3 inches) | 84% | moderate |
| November Weather | 3°C (38°F) | 67 mm (2.6 inches) | 89% | moderate |
| December Weather | -1°C (31°F) | 54 mm (2.1 inches) | 86% | low |