September Weather in Galena, United States

Last updated: June 24, 2025

In September, the average temperature in Galena, United States is a pleasant 22°C (72°F). Temperatures can vary widely, with a minimum of 8°C (46°F) and a maximum soaring up to 36°C (96°F). Visitors can expect about 110 mm (4.3 in) of precipitation over 8 days, making for a humidity level of around 69%.

September Temperature in Galena

In September in Galena, the average temperature is 22°C (72°F). Maximums can reach 36°C (96°F), while minimums can dip as low as 8°C (46°F). This range makes Galena an ideal destination for travelers seeking a pleasant climate and the opportunity to enjoy a variety of outdoor activities.

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

The chart illustrates September temperature patterns in Galena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Galena, September typically has an average temperature of 22°C (72°F), with highs reaching up to 36°C (96°F) and lows dropping to around 8°C (46°F).

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

September Precipitation in Galena

In Galena in September, the precipitation amount is 110 mm (4.3 in) over a period of 8 days.

September Precipitation Trends in Galena

The chart displays monthly precipitation patterns in Galena, 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 Galena, September typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 8 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Galena

In Galena in September, humidity is 69%. With an average temperature of 22°C (72°F), this humidity feels like a warm, enveloping blanket, making travel feel sticky and slightly oppressive, yet also invigorating as the air is thick with the scent of blooming flora and vibrant surroundings.

September Average Humidity in Galena

This chart illustrates the average monthly humidity levels in Galena, 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 Galena is approximately 69%, 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 Galena

In Galena 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 Galena.

Maximum UV Index Levels in Galena for September

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

Data source: Galena 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 Galena Compares to Other Months

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

This table compares monthly weather conditions in Galena, 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 (35°F)	87 mm (3.4 inches)	87%	moderate
February Weather	4°C (39°F)	127 mm (5.0 inches)	85%	moderate
March Weather	9°C (48°F)	133 mm (5.2 inches)	86%	high
April Weather	13°C (56°F)	137 mm (5.4 inches)	84%	very high
May Weather	20°C (67°F)	136 mm (5.4 inches)	79%	very high
June Weather	24°C (75°F)	150 mm (5.9 inches)	82%	extreme
July Weather	26°C (79°F)	103 mm (4.0 inches)	79%	very high
August Weather	24°C (76°F)	97 mm (3.8 inches)	70%	very high
September Weather	22°C (72°F)	110 mm (4.3 inches)	69%	very high
October Weather	16°C (60°F)	100 mm (3.9 inches)	76%	high
November Weather	7°C (45°F)	89 mm (3.5 inches)	88%	moderate
December Weather	5°C (41°F)	106 mm (4.2 inches)	87%	moderate