September Weather in Highland, United States

Last updated: June 24, 2025

In September, the average temperature in Highland, United States is a pleasant 23°C (74°F). However, temperatures can range widely, with a minimum of 9°C (48°F) and a scorching maximum of 42°C (108°F). Expect some light rain, with an average precipitation of just 9 mm (0.4 in) over the span of 2 days. The average humidity sits at 41%, making for a comfortable atmosphere.

September Temperature in Highland

In September in Highland, the average temperature is 23°C (74°F), with maximums reaching 42°C (108°F) and minimums dropping as low as 9°C (48°F). This variety in temperature makes Highland an ideal destination for travelers seeking both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Highland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Highland, September typically has an average temperature of 23°C (74°F), with highs reaching up to 42°C (108°F) and lows dropping to around 9°C (48°F).

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

September Precipitation in Highland

In Highland in September, the precipitation amount is 9 mm (0.4 in) over the course of 2 days.

September Precipitation Trends in Highland

The chart displays monthly precipitation patterns in Highland, 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 Highland, September typically receives around 9 mm (0.4 inches) of precipitation spread over approximately 2 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 Highland

In Highland in September humidity is 41%. With an average temperature of 23°C (74°F), this humidity feels like a comfortable breeze, making it pleasant for traveling and exploring the sights without the discomfort of excessive moisture in the air.

September Average Humidity in Highland

This chart illustrates the average monthly humidity levels in Highland, 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 Highland is approximately 41%, 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 Highland

In Highland in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Highland.

Maximum UV Index Levels in Highland for September

The chart shows the monthly maximum UV Index (UVI) for Highland 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 Highland typically reaches 10, which falls under the very high exposure category.

Data source: Highland 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 Highland Compares to Other Months

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

This table compares monthly weather conditions in Highland, 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 (49°F)	51 mm (2.0 inches)	76%	moderate
February Weather	9°C (49°F)	56 mm (2.2 inches)	80%	high
March Weather	11°C (52°F)	52 mm (2.1 inches)	69%	very high
April Weather	15°C (60°F)	24 mm (0.9 inches)	57%	extreme
May Weather	17°C (64°F)	13 mm (0.5 inches)	45%	extreme
June Weather	23°C (73°F)	4 mm (0.1 inches)	34%	extreme
July Weather	26°C (79°F)	12 mm (0.5 inches)	29%	extreme
August Weather	26°C (79°F)	11 mm (0.4 inches)	28%	extreme
September Weather	23°C (74°F)	9 mm (0.4 inches)	41%	very high
October Weather	18°C (65°F)	8 mm (0.3 inches)	54%	very high
November Weather	14°C (57°F)	19 mm (0.8 inches)	68%	moderate
December Weather	9°C (49°F)	56 mm (2.2 inches)	75%	moderate