September Weather in Geneva-on-the-Lake, United States

Last updated: June 24, 2025

In September, the average temperature in Geneva-on-the-Lake, United States hovers around 19°C (67°F), with minimums dipping to 6°C (44°F) and maximums soaring up to 32°C (91°F). Expect about 89 mm (3.5 in) of precipitation over the course of 10 days, contributing to an average humidity level of 77%. Stay prepared for a mix of delightful warmth and refreshing showers!

September Temperature in Geneva-on-the-Lake

In September in Geneva-on-the-Lake, the average temperature is 19°C (67°F), with maximums reaching up to 32°C (91°F) and minimums dropping as low as 6°C (44°F). This mild climate makes Geneva-on-the-Lake an ideal destination for outdoor activities and exploring local attractions.

September Weather in Geneva-on-the-Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Geneva-on-the-Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Geneva-on-the-Lake, September typically has an average temperature of 19°C (67°F), with highs reaching up to 32°C (91°F) and lows dropping to around 6°C (44°F).

Data source: Temperature data for Geneva-on-the-Lake generated using information from the Copernicus Climate Change Service.

September Precipitation in Geneva-on-the-Lake

In Geneva-on-the-Lake in September, the precipitation amount is 89 mm (3.5 in) over a period of 10 days.

September Precipitation Trends in Geneva-on-the-Lake

The chart displays monthly precipitation patterns in Geneva-on-the-Lake, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Geneva-on-the-Lake, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Geneva-on-the-Lake

In Geneva-on-the-Lake in September, humidity is 77%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel slightly more challenging as the air clings to your skin, turning every step into a leisurely stroll through a sauna.

September Average Humidity in Geneva-on-the-Lake

This chart illustrates the average monthly humidity levels in Geneva-on-the-Lake, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Geneva-on-the-Lake is approximately 77%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Geneva-on-the-Lake

In Geneva-on-the-Lake 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 Geneva-on-the-Lake.

Maximum UV Index Levels in Geneva-on-the-Lake for September

The chart shows the monthly maximum UV Index (UVI) for Geneva-on-the-Lake in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Geneva-on-the-Lake typically reaches 8, which falls under the very high exposure category.

Data source: Geneva-on-the-Lake September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Geneva-on-the-Lake Compares to Other Months

Weather in Geneva-on-the-Lake varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Geneva-on-the-Lake, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Geneva-on-the-Lake, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (30°F)	88 mm (3.5 inches)	88%	moderate
February Weather	0°C (31°F)	89 mm (3.5 inches)	88%	moderate
March Weather	3°C (38°F)	90 mm (3.5 inches)	87%	high
April Weather	8°C (47°F)	108 mm (4.2 inches)	87%	very high
May Weather	15°C (59°F)	120 mm (4.7 inches)	81%	very high
June Weather	20°C (68°F)	108 mm (4.2 inches)	83%	very high
July Weather	23°C (74°F)	133 mm (5.2 inches)	82%	very high
August Weather	22°C (72°F)	96 mm (3.8 inches)	76%	very high
September Weather	19°C (67°F)	89 mm (3.5 inches)	77%	very high
October Weather	13°C (57°F)	127 mm (5.0 inches)	82%	high
November Weather	5°C (42°F)	104 mm (4.1 inches)	89%	moderate
December Weather	2°C (35°F)	100 mm (4.0 inches)	86%	low