Last updated: June 24, 2025
In Sauk City, United States, the average temperature in September hovers around 18°C (65°F), making it a pleasant time to explore. However, temperatures can vary significantly, dipping to a chilly 2°C (36°F) at night and soaring up to a warm 33°C (92°F) during the day. Expect some rain as well, with an average precipitation of 116 mm (4.6 in) spread over about 10 days. The average humidity sits at a comfortable 79%, adding to the overall climate experience.
In September, in Sauk City, the average temperature is 18°C (65°F). The maximum can reach 33°C (92°F), while the minimum can be as low as 2°C (36°F). This temperature range makes Sauk City an ideal destination for travelers seeking both warm days and cool nights.
In Sauk City in September, the total precipitation amount is 116 mm (4.6 in) over a span of 10 days.
In Sauk City in September, humidity is 79%. With an average temperature of 18°C (65°F), this humidity feels like walking through a warm mist, making traveling slightly uncomfortable and sticky, but offering a refreshing escape when you find moments of shade or a breeze.
In Sauk City 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 Sauk City.
UV Risk Categories
Weather in Sauk City varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sauk City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 47 mm (1.9 inches) | 85% | moderate |
| February Weather | -6°C (22°F) | 54 mm (2.1 inches) | 85% | moderate |
| March Weather | 2°C (36°F) | 58 mm (2.3 inches) | 85% | moderate |
| April Weather | 8°C (46°F) | 89 mm (3.5 inches) | 85% | very high |
| May Weather | 15°C (59°F) | 129 mm (5.1 inches) | 78% | very high |
| June Weather | 21°C (70°F) | 115 mm (4.5 inches) | 80% | very high |
| July Weather | 23°C (74°F) | 88 mm (3.4 inches) | 78% | very high |
| August Weather | 22°C (71°F) | 110 mm (4.3 inches) | 76% | very high |
| September Weather | 18°C (65°F) | 116 mm (4.6 inches) | 79% | very high |
| October Weather | 10°C (51°F) | 116 mm (4.6 inches) | 83% | moderate |
| November Weather | 2°C (36°F) | 44 mm (1.7 inches) | 88% | moderate |
| December Weather | -2°C (29°F) | 44 mm (1.7 inches) | 81% | low |