September Weather in Deer Trail, United States

Last updated: June 24, 2025

In September, the average temperature in Deer Trail, United States hovers around 20°C (68°F), providing a pleasant climate for outdoor activities. Temperatures can vary dramatically, with a minimum of -1°C (31°F) and a peak of 36°C (97°F). Rainfall is moderate, with 26 mm (1.0 in) of precipitation over 5 days. Additionally, the average humidity level is a notable 79%, contributing to the overall weather experience.

September Temperature in Deer Trail

In September in Deer Trail, the average temperature is 20°C (68°F). The maximum can reach 36°C (97°F) and the minimum can be as low as -1°C (31°F). It's a perfect time to enjoy a range of outdoor activities while being prepared for both warm and cooler conditions.

September Weather in Deer Trail: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Deer Trail, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Deer Trail, September typically has an average temperature of 20°C (68°F), with highs reaching up to 36°C (97°F) and lows dropping to around -1°C (31°F).

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

September Precipitation in Deer Trail

In Deer Trail in September, the precipitation amount is 26 mm (1.0 in) over the course of 5 days.

September Precipitation Trends in Deer Trail

The chart displays monthly precipitation patterns in Deer Trail, 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 Deer Trail, September typically receives around 26 mm (1.0 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 Deer Trail

In Deer Trail in September humidity is 79%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that clings to the skin, making outdoor activities feel more strenuous and prompting the need for frequent breaks and hydration while traveling.

September Average Humidity in Deer Trail

This chart illustrates the average monthly humidity levels in Deer Trail, 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 Deer Trail is approximately 79%, 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 Deer Trail

In Deer Trail 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 Deer Trail.

Maximum UV Index Levels in Deer Trail for September

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

Data source: Deer Trail 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 Deer Trail Compares to Other Months

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

This table compares monthly weather conditions in Deer Trail, 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 (33°F)	16 mm (0.6 inches)	74%	moderate
February Weather	0°C (32°F)	16 mm (0.6 inches)	75%	moderate
March Weather	5°C (42°F)	62 mm (2.4 inches)	66%	very high
April Weather	9°C (49°F)	44 mm (1.7 inches)	62%	very high
May Weather	14°C (58°F)	88 mm (3.5 inches)	74%	extreme
June Weather	21°C (71°F)	56 mm (2.2 inches)	76%	extreme
July Weather	24°C (75°F)	51 mm (2.0 inches)	75%	extreme
August Weather	23°C (74°F)	42 mm (1.7 inches)	80%	extreme
September Weather	20°C (68°F)	26 mm (1.0 inches)	79%	very high
October Weather	10°C (51°F)	30 mm (1.2 inches)	77%	high
November Weather	6°C (43°F)	16 mm (0.6 inches)	74%	moderate
December Weather	2°C (36°F)	8 mm (0.3 inches)	80%	moderate