September Weather in Leavenworth, United States

Last updated: June 24, 2025

In September, the average temperature in Leavenworth, United States hovers around 22°C (72°F). Expect a minimum of 6°C (44°F) and a maximum of 33°C (92°F). With an average humidity of 71%, prepare for a precipitation of approximately 81 mm (3.2 in) over the course of 8 days. Stay ready for a mix of warm days and refreshing showers!

September Temperature in Leavenworth

In September in Leavenworth, the average temperature is 22°C (72°F), with maximums reaching up to 33°C (92°F) and minimums dropping as low as 6°C (44°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities while experiencing pleasant weather.

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

The chart illustrates September temperature patterns in Leavenworth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Leavenworth, September typically has an average temperature of 22°C (72°F), with highs reaching up to 33°C (92°F) and lows dropping to around 6°C (44°F).

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

September Precipitation in Leavenworth

In Leavenworth in September, the precipitation amount is 81 mm (3.2 in) over the course of 8 days.

September Precipitation Trends in Leavenworth

The chart displays monthly precipitation patterns in Leavenworth, 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 Leavenworth, September typically receives around 81 mm (3.2 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 Leavenworth

In Leavenworth in September humidity is 71%. With an average temperature of 22°C (72°F), this humidity feels like the air is thick and slightly stifling, making outdoor activities require frequent breaks to stay hydrated and cool.

September Average Humidity in Leavenworth

This chart illustrates the average monthly humidity levels in Leavenworth, 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 Leavenworth is approximately 71%, 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 Leavenworth

In Leavenworth in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Leavenworth.

Maximum UV Index Levels in Leavenworth for September

The chart shows the monthly maximum UV Index (UVI) for Leavenworth 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 Leavenworth typically reaches 9, which falls under the very high exposure category.

Data source: Leavenworth 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 Leavenworth Compares to Other Months

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

This table compares monthly weather conditions in Leavenworth, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	48 mm (1.9 inches)	76%	moderate
February Weather	0°C (32°F)	33 mm (1.3 inches)	77%	moderate
March Weather	8°C (46°F)	95 mm (3.8 inches)	70%	high
April Weather	12°C (54°F)	85 mm (3.4 inches)	73%	very high
May Weather	19°C (66°F)	203 mm (8.0 inches)	82%	very high
June Weather	25°C (77°F)	112 mm (4.4 inches)	82%	extreme
July Weather	26°C (80°F)	94 mm (3.7 inches)	81%	extreme
August Weather	25°C (77°F)	132 mm (5.2 inches)	78%	very high
September Weather	22°C (72°F)	81 mm (3.2 inches)	71%	very high
October Weather	14°C (57°F)	112 mm (4.4 inches)	71%	high
November Weather	6°C (44°F)	45 mm (1.8 inches)	81%	moderate
December Weather	3°C (37°F)	35 mm (1.4 inches)	84%	moderate