September Weather in Douglas, United States

Last updated: June 24, 2025

In September, the average temperature in Douglas, United States hovers around 16°C (62°F). Expect a wide temperature range, with lows dipping to -6°C (22°F) and highs reaching up to 37°C (99°F). During the month, precipitation totals approximately 35 mm (1.4 in) spread over about 5 days, while the average humidity remains at a comfortable 72%.

September Temperature in Douglas

In September in Douglas, the average temperature is 16°C (62°F). The maximum can reach 37°C (99°F), and the minimum can be as low as -6°C (22°F). Travelers should be prepared for a wide range of temperatures, from warm days to chilly nights.

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

The chart illustrates September temperature patterns in Douglas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Douglas, September typically has an average temperature of 16°C (62°F), with highs reaching up to 37°C (99°F) and lows dropping to around -6°C (22°F).

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

September Precipitation in Douglas

In Douglas in September, the precipitation amount is 35 mm (1.4 in) over a span of 5 days.

September Precipitation Trends in Douglas

The chart displays monthly precipitation patterns in Douglas, 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 Douglas, September typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 5 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 Douglas

In Douglas in September, humidity is 72%. With an average temperature of 16°C (62°F), this humidity feels like a warm blanket wrapped around you, making it slightly uncomfortable for traveling as you might find yourself sweating more than usual, especially during outdoor activities.

September Average Humidity in Douglas

This chart illustrates the average monthly humidity levels in Douglas, 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 Douglas is approximately 72%, 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 Douglas

In Douglas 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 Douglas.

Maximum UV Index Levels in Douglas for September

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

Data source: Douglas 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 Douglas Compares to Other Months

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

This table compares monthly weather conditions in Douglas, 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)	20 mm (0.8 inches)	79%	moderate
February Weather	-6°C (22°F)	32 mm (1.3 inches)	81%	high
March Weather	1°C (35°F)	56 mm (2.2 inches)	70%	high
April Weather	5°C (41°F)	60 mm (2.4 inches)	67%	extreme
May Weather	10°C (51°F)	83 mm (3.3 inches)	70%	very high
June Weather	19°C (66°F)	44 mm (1.7 inches)	75%	extreme
July Weather	23°C (73°F)	35 mm (1.4 inches)	76%	extreme
August Weather	21°C (70°F)	30 mm (1.2 inches)	76%	very high
September Weather	16°C (62°F)	35 mm (1.4 inches)	72%	very high
October Weather	6°C (43°F)	46 mm (1.8 inches)	70%	high
November Weather	2°C (36°F)	26 mm (1.0 inches)	76%	moderate
December Weather	-2°C (29°F)	25 mm (1.0 inches)	81%	moderate