September Weather in Stephen, United States

Last updated: June 24, 2025

In September, the average temperature in Stephen, United States hovers around 15°C (59°F). Visitors should be prepared for a wide range of temperatures, as it can dip to a frigid -3°C (27°F) or soar to a sweltering 32°C (90°F). Expect an average precipitation of 77 mm (3.0 in) spread over 10 days, contributing to a cozy average humidity of 75%.

September Temperature in Stephen

In September in Stephen, the average temperature is 15°C (59°F). Maximum can reach 32°C (90°F) and minimum can be as low as -3°C (27°F). This temperature variation means travelers should be prepared for both warm days and cooler nights during their visit.

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

The chart illustrates September temperature patterns in Stephen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stephen, September typically has an average temperature of 15°C (59°F), with highs reaching up to 32°C (90°F) and lows dropping to around -3°C (27°F).

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

September Precipitation in Stephen

In Stephen in September, the total precipitation amount is 77 mm (3.0 in) spread over a duration of 10 days.

September Precipitation Trends in Stephen

The chart displays monthly precipitation patterns in Stephen, 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 Stephen, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 10 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 Stephen

In Stephen in September, humidity is 75%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making it feel more oppressive than refreshing, which can be a challenge for travelers seeking comfort while exploring the area.

September Average Humidity in Stephen

This chart illustrates the average monthly humidity levels in Stephen, 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 Stephen is approximately 75%, 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 Stephen

In Stephen in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Stephen.

Maximum UV Index Levels in Stephen for September

The chart shows the monthly maximum UV Index (UVI) for Stephen 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 Stephen typically reaches 7, which falls under the high exposure category.

Data source: Stephen 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 Stephen Compares to Other Months

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

This table compares monthly weather conditions in Stephen, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-14°C (8°F)	18 mm (0.7 inches)	94%	low
February Weather	-15°C (6°F)	20 mm (0.8 inches)	91%	moderate
March Weather	-4°C (25°F)	23 mm (0.9 inches)	90%	moderate
April Weather	3°C (38°F)	32 mm (1.2 inches)	81%	high
May Weather	13°C (55°F)	52 mm (2.0 inches)	74%	very high
June Weather	20°C (68°F)	84 mm (3.3 inches)	75%	very high
July Weather	22°C (71°F)	66 mm (2.6 inches)	74%	very high
August Weather	20°C (68°F)	68 mm (2.7 inches)	77%	very high
September Weather	15°C (59°F)	77 mm (3.0 inches)	75%	high
October Weather	6°C (43°F)	82 mm (3.2 inches)	78%	moderate
November Weather	-4°C (26°F)	27 mm (1.1 inches)	87%	low
December Weather	-9°C (15°F)	32 mm (1.2 inches)	93%	low