September Weather in Genoa, United States

Last updated: June 24, 2025

In September, the average temperature in Genoa, United States hovers around 20°C (69°F). Expect a wide range, with minimums dipping to 4°C (40°F) and maximums soaring to 35°C (96°F). With an average humidity of 77% and 53 mm (2.1 in) of precipitation spread over 8 days, it’s a month where you’ll want to be prepared for both sun and showers!

September Temperature in Genoa

In September in Genoa, the average temperature is 20°C (69°F). Maximum temperatures can reach 35°C (96°F), while minimum temperatures can drop as low as 4°C (40°F). Be prepared for a range of weather conditions when traveling during this month in Genoa.

September Weather in Genoa: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Genoa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Genoa, September typically has an average temperature of 20°C (69°F), with highs reaching up to 35°C (96°F) and lows dropping to around 4°C (40°F).

Data source: Temperature data for Genoa generated using information from the Copernicus Climate Change Service.

September Precipitation in Genoa

In Genoa in September, the total precipitation amount is 53 mm (2.1 in) over the course of 8 days.

September Precipitation Trends in Genoa

The chart displays monthly precipitation patterns in Genoa, 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 Genoa, September typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 8 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 Genoa

In Genoa in September, humidity is 77%. With an average temperature of 20°C (69°F), this humidity feels like a sultry embrace, making travel comfortable yet slightly sticky, as the moist air clings to your skin with every step you take.

September Average Humidity in Genoa

This chart illustrates the average monthly humidity levels in Genoa, 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 Genoa 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 Genoa

In Genoa 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 Genoa.

Maximum UV Index Levels in Genoa for September

The chart shows the monthly maximum UV Index (UVI) for Genoa 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 Genoa typically reaches 8, which falls under the very high exposure category.

Data source: Genoa 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 Genoa Compares to Other Months

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

This table compares monthly weather conditions in Genoa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	27 mm (1.1 inches)	73%	moderate
February Weather	-4°C (25°F)	21 mm (0.8 inches)	81%	moderate
March Weather	4°C (40°F)	88 mm (3.5 inches)	69%	high
April Weather	9°C (49°F)	54 mm (2.1 inches)	71%	very high
May Weather	16°C (61°F)	143 mm (5.6 inches)	80%	very high
June Weather	24°C (75°F)	100 mm (3.9 inches)	83%	extreme
July Weather	25°C (78°F)	67 mm (2.6 inches)	84%	very high
August Weather	23°C (74°F)	94 mm (3.7 inches)	84%	very high
September Weather	20°C (69°F)	53 mm (2.1 inches)	77%	very high
October Weather	11°C (51°F)	83 mm (3.3 inches)	72%	high
November Weather	4°C (40°F)	24 mm (0.9 inches)	80%	moderate
December Weather	-1°C (30°F)	41 mm (1.6 inches)	79%	low