September Weather in Jasper, United States

Last updated: June 24, 2025

In September, the average temperature in Jasper, United States is a pleasant 26°C (80°F). However, temperatures can vary, dipping to a cool 14°C (57°F) and soaring up to a sweltering 39°C (102°F). Expect about 160 mm (6.3 in) of precipitation over 12 days, contributing to an average humidity of 72%. Whether you're exploring or relaxing, be prepared for a mix of warmth and the occasional shower!

September Temperature in Jasper

In September in Jasper, the average temperature is 26°C (80°F). Maximum temperatures can reach 39°C (102°F) while minimums can drop to as low as 14°C (57°F). Be prepared for warm days and cooler evenings when traveling during this time.

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

The chart illustrates September temperature patterns in Jasper, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jasper, September typically has an average temperature of 26°C (80°F), with highs reaching up to 39°C (102°F) and lows dropping to around 14°C (57°F).

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

September Precipitation in Jasper

In Jasper in September, the precipitation amount is 160 mm (6.3 in) over a span of 12 days.

September Precipitation Trends in Jasper

The chart displays monthly precipitation patterns in Jasper, 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 Jasper, September typically receives around 160 mm (6.3 inches) of precipitation spread over approximately 12 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 Jasper

In Jasper in September, humidity is 72%. With an average temperature of 26°C (80°F), this humidity feels like a warm embrace, making traveling feel a bit heavier, yet invigorating as you navigate the vibrant atmosphere, surrounded by the rich scents and lively sounds of the locale.

September Average Humidity in Jasper

This chart illustrates the average monthly humidity levels in Jasper, 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 Jasper is approximately 72%, 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 Jasper

In Jasper 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 Jasper.

Maximum UV Index Levels in Jasper for September

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

Data source: Jasper 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 Jasper Compares to Other Months

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

This table compares monthly weather conditions in Jasper, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	107 mm (4.2 inches)	81%	moderate
February Weather	13°C (55°F)	114 mm (4.5 inches)	81%	very high
March Weather	17°C (64°F)	101 mm (4.0 inches)	79%	very high
April Weather	20°C (68°F)	132 mm (5.2 inches)	80%	very high
May Weather	24°C (76°F)	184 mm (7.2 inches)	81%	extreme
June Weather	27°C (81°F)	150 mm (5.9 inches)	76%	extreme
July Weather	28°C (83°F)	98 mm (3.8 inches)	73%	extreme
August Weather	28°C (83°F)	183 mm (7.2 inches)	71%	extreme
September Weather	26°C (80°F)	160 mm (6.3 inches)	72%	very high
October Weather	21°C (71°F)	144 mm (5.7 inches)	73%	very high
November Weather	15°C (59°F)	68 mm (2.7 inches)	83%	high
December Weather	13°C (55°F)	133 mm (5.3 inches)	88%	moderate