September Weather in Armstrong, United States

Last updated: June 24, 2025

In September, the average temperature in Armstrong, United States hovers around 19°C (66°F). Expect a range with minimums dropping to 3°C (38°F) and maximums soaring up to 33°C (92°F). During this period, precipitation reaches 111 mm (4.4 in) across 9 days, resulting in an average humidity of 75%.

September Temperature in Armstrong

In September in Armstrong, the average temperature is 19°C (66°F). Maximum temperatures can reach 33°C (92°F), while minimums can dip as low as 3°C (38°F). This variety in weather makes Armstrong an ideal destination for travelers seeking both warm and cool experiences.

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

The chart illustrates September temperature patterns in Armstrong, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Armstrong, September typically has an average temperature of 19°C (66°F), with highs reaching up to 33°C (92°F) and lows dropping to around 3°C (38°F).

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

September Precipitation in Armstrong

In Armstrong in September, the precipitation amount is 111 mm (4.4 in) over the course of 9 days.

September Precipitation Trends in Armstrong

The chart displays monthly precipitation patterns in Armstrong, 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 Armstrong, September typically receives around 111 mm (4.4 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 Armstrong

In Armstrong in September humidity is 75%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making it slightly uncomfortable for traveling as you navigate through the thick, muggy air.

September Average Humidity in Armstrong

This chart illustrates the average monthly humidity levels in Armstrong, 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 Armstrong 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 Armstrong

In Armstrong 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 Armstrong.

Maximum UV Index Levels in Armstrong for September

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

Data source: Armstrong 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 Armstrong Compares to Other Months

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

This table compares monthly weather conditions in Armstrong, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (18°F)	34 mm (1.3 inches)	82%	moderate
February Weather	-8°C (18°F)	41 mm (1.6 inches)	84%	moderate
March Weather	1°C (35°F)	73 mm (2.9 inches)	80%	moderate
April Weather	7°C (45°F)	94 mm (3.7 inches)	81%	very high
May Weather	15°C (60°F)	148 mm (5.8 inches)	74%	very high
June Weather	22°C (73°F)	119 mm (4.7 inches)	80%	very high
July Weather	24°C (75°F)	110 mm (4.3 inches)	80%	very high
August Weather	21°C (71°F)	113 mm (4.4 inches)	77%	very high
September Weather	19°C (66°F)	111 mm (4.4 inches)	75%	very high
October Weather	9°C (49°F)	94 mm (3.7 inches)	80%	moderate
November Weather	2°C (35°F)	34 mm (1.3 inches)	87%	moderate
December Weather	-3°C (26°F)	43 mm (1.7 inches)	83%	moderate