September Weather in Tri-Lakes, United States

Last updated: June 24, 2025

In September, the average temperature in Tri-Lakes, United States is a pleasant 20°C (67°F), with a minimum dipping to 4°C (39°F) and a maximum soaring to 32°C (91°F). Expect about 70 mm (2.8 in) of precipitation over 8 days, and don't forget to bring your umbrella, as the average humidity sits at a cozy 78%!

September Temperature in Tri-Lakes

In September in Tri-Lakes, the average temperature is 20°C (67°F). Maximum temperatures can reach 32°C (91°F), while minimums can drop to as low as 4°C (39°F). This makes Tri-Lakes an ideal destination for travelers seeking a pleasant climate with a variety of outdoor activities.

September Weather in Tri-Lakes: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Tri-Lakes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tri-Lakes, September typically has an average temperature of 20°C (67°F), with highs reaching up to 32°C (91°F) and lows dropping to around 4°C (39°F).

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

September Precipitation in Tri-Lakes

In Tri-Lakes in September, the total precipitation amount is 70 mm (2.8 in), spread over the course of 8 days.

September Precipitation Trends in Tri-Lakes

The chart displays monthly precipitation patterns in Tri-Lakes, 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 Tri-Lakes, September typically receives around 70 mm (2.8 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 Tri-Lakes

In Tri-Lakes in September humidity is 78%. With an average temperature of 20°C (67°F), this humidity feels like walking through a warm, thick blanket, making travel a bit sticky and requiring frequent breaks to find shade and cool refreshments.

September Average Humidity in Tri-Lakes

This chart illustrates the average monthly humidity levels in Tri-Lakes, 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 Tri-Lakes is approximately 78%, 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 Tri-Lakes

In Tri-Lakes 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 Tri-Lakes.

Maximum UV Index Levels in Tri-Lakes for September

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

Data source: Tri-Lakes 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 Tri-Lakes Compares to Other Months

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

This table compares monthly weather conditions in Tri-Lakes, 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 (28°F)	73 mm (2.9 inches)	85%	moderate
February Weather	-1°C (30°F)	77 mm (3.0 inches)	85%	moderate
March Weather	4°C (40°F)	104 mm (4.1 inches)	86%	high
April Weather	9°C (49°F)	98 mm (3.8 inches)	87%	very high
May Weather	16°C (62°F)	132 mm (5.2 inches)	81%	very high
June Weather	22°C (72°F)	116 mm (4.6 inches)	82%	very high
July Weather	24°C (76°F)	112 mm (4.4 inches)	81%	very high
August Weather	23°C (73°F)	104 mm (4.1 inches)	79%	very high
September Weather	20°C (67°F)	70 mm (2.8 inches)	78%	very high
October Weather	13°C (56°F)	112 mm (4.4 inches)	81%	high
November Weather	5°C (40°F)	82 mm (3.2 inches)	89%	moderate
December Weather	1°C (34°F)	61 mm (2.4 inches)	86%	low