September Weather in Barrow, United States

Last updated: June 24, 2025

In Barrow, United States, the average temperature in September hovers around 2°C (37°F), with a minimum that can plummet to -6°C (21°F) and a maximum reaching up to 15°C (58°F). Expect a fair amount of precipitation, with 32 mm (1.3 in) falling across 9 days, contributing to an average humidity level of an impressive 93%.

September Temperature in Barrow

In September in Barrow, the average temperature is 2°C (37°F). Maximums can reach 15°C (58°F), while minimums can drop as low as -6°C (21°F). Travelers should be prepared for a chilly experience, making warm clothing essential for enjoying the local sights.

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

The chart illustrates September temperature patterns in Barrow, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Barrow, September typically has an average temperature of 2°C (37°F), with highs reaching up to 15°C (58°F) and lows dropping to around -6°C (21°F).

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

September Precipitation in Barrow

In Barrow in September, the precipitation amount is 32 mm (1.3 in) over the course of 9 days.

September Precipitation Trends in Barrow

The chart displays monthly precipitation patterns in Barrow, 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 Barrow, September typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 9 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 Barrow

In Barrow in September humidity is 93%. With an average temperature of 2°C (37°F), this humidity feels like a cold, damp blanket that clings to your skin, making traveling uncomfortable and the air seem heavier, as if each step is weighed down by the chill and the moisture.

September Average Humidity in Barrow

This chart illustrates the average monthly humidity levels in Barrow, 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 Barrow is approximately 93%, 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 Barrow

In Barrow in September, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Barrow, you can visit Hourly UV Index in Barrow.

Maximum UV Index Levels in Barrow for September

The chart shows the monthly maximum UV Index (UVI) for Barrow 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 Barrow typically reaches 2, which falls under the low exposure category.

Data source: Barrow 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 Barrow Compares to Other Months

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

This table compares monthly weather conditions in Barrow, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-23°C (-8°F)	9 mm (0.4 inches)	99%	low
February Weather	-24°C (-11°F)	15 mm (0.6 inches)	99%	low
March Weather	-19°C (-3°F)	16 mm (0.6 inches)	98%	low
April Weather	-14°C (7°F)	10 mm (0.4 inches)	94%	moderate
May Weather	-4°C (25°F)	14 mm (0.6 inches)	89%	moderate
June Weather	2°C (36°F)	16 mm (0.6 inches)	85%	moderate
July Weather	6°C (43°F)	54 mm (2.1 inches)	91%	moderate
August Weather	4°C (40°F)	45 mm (1.8 inches)	91%	moderate
September Weather	2°C (37°F)	32 mm (1.3 inches)	93%	low
October Weather	-3°C (27°F)	31 mm (1.2 inches)	92%	low
November Weather	-10°C (14°F)	30 mm (1.2 inches)	96%	low
December Weather	-19°C (-3°F)	20 mm (0.8 inches)	99%	low