September Weather in Dillon, United States

Last updated: June 24, 2025

In Dillon, United States, the average temperature in September hovers around 12°C (54°F). Expect a temperature range from a frigid -5°C (24°F) to a warm 33°C (91°F). During this month, rainfall totals approximately 35 mm (1.4 in) over about 6 days, contributing to an average humidity of 66%. 🌦️

September Temperature in Dillon

In September in Dillon, the average temperature is 12°C (54°F), with maximums reaching 33°C (91°F) and minimums dropping as low as -5°C (24°F). Be sure to pack a range of clothing to be prepared for both warm and chilly conditions during your travels!

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

The chart illustrates September temperature patterns in Dillon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dillon, September typically has an average temperature of 12°C (54°F), with highs reaching up to 33°C (91°F) and lows dropping to around -5°C (24°F).

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

September Precipitation in Dillon

In Dillon in September, the total precipitation amount is 35 mm (1.4 in) spread over a period of 6 days.

September Precipitation Trends in Dillon

The chart displays monthly precipitation patterns in Dillon, 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 Dillon, September typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 6 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 Dillon

In Dillon in September, humidity is 66%. With an average temperature of 12°C (54°F), this humidity feels like a cool embrace, making outdoor adventures comfortable yet slightly damp, perfect for exploring without the heat of summer weighing you down.

September Average Humidity in Dillon

This chart illustrates the average monthly humidity levels in Dillon, 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 Dillon is approximately 66%, 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 Dillon

In Dillon 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 Dillon.

Maximum UV Index Levels in Dillon for September

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

Data source: Dillon 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 Dillon Compares to Other Months

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

This table compares monthly weather conditions in Dillon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-9°C (16°F)	19 mm (0.7 inches)	94%	moderate
February Weather	-9°C (16°F)	44 mm (1.7 inches)	93%	moderate
March Weather	-3°C (27°F)	31 mm (1.2 inches)	91%	high
April Weather	1°C (35°F)	47 mm (1.8 inches)	87%	very high
May Weather	7°C (46°F)	77 mm (3.0 inches)	83%	very high
June Weather	14°C (57°F)	67 mm (2.6 inches)	80%	extreme
July Weather	19°C (66°F)	23 mm (0.9 inches)	75%	extreme
August Weather	17°C (64°F)	25 mm (1.0 inches)	66%	very high
September Weather	12°C (54°F)	35 mm (1.4 inches)	66%	very high
October Weather	2°C (36°F)	39 mm (1.5 inches)	77%	high
November Weather	-3°C (27°F)	24 mm (1.0 inches)	91%	moderate
December Weather	-9°C (17°F)	25 mm (1.0 inches)	96%	low