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September Weather in Jasper, United States

Last updated: June 24, 2025

In Jasper, United States, the average temperature in September hovers around 26°C (80°F), offering a pleasant climate for outdoor adventures. Temperatures can vary, dipping to a minimum of 15°C (58°F) and soaring to a maximum of 37°C (100°F). Expect some rain, with an average precipitation of 124 mm (4.9 in) spread over 13 days. The air can feel quite humid, with an average humidity level of 83%, creating a lush, tropical atmosphere.

September Temperature in Jasper

In September in Jasper, the average temperature is 26°C (80°F). Maximums can reach 37°C (100°F), while minimums can drop to as low as 15°C (58°F). This range makes it an ideal destination for travelers seeking warm weather and pleasant conditions.

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 37°C (100°F) and lows dropping to around 15°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec546064697680818179746157
Data source: Temperature data for Jasper generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Jasper

In Jasper in September, the total precipitation amount is 124 mm (4.9 in) over a span of 13 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 124 mm (4.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec59804275721471561541245857117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Jasper

In Jasper in September humidity is 83%. With an average temperature of 26°C (80°F), this humidity feels like a warm, enveloping blanket that can make traveling quite uncomfortable; you may find yourself needing frequent breaks for hydration and cool shade as the thick air clings to your skin.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%82%80%76%73%74%80%79%83%77%84%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec589101111121110865
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.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)59 mm (2.3 inches)85%moderate
February Weather16°C (60°F)80 mm (3.1 inches)82%very high
March Weather18°C (64°F)42 mm (1.6 inches)80%very high
April Weather21°C (69°F)75 mm (2.9 inches)76%very high
May Weather25°C (76°F)72 mm (2.8 inches)73%extreme
June Weather27°C (80°F)147 mm (5.8 inches)74%extreme
July Weather27°C (81°F)156 mm (6.2 inches)80%extreme
August Weather27°C (81°F)154 mm (6.0 inches)79%extreme
September Weather26°C (80°F)124 mm (4.9 inches)83%very high
October Weather23°C (74°F)58 mm (2.3 inches)77%very high
November Weather16°C (61°F)57 mm (2.3 inches)84%high
December Weather14°C (57°F)117 mm (4.6 inches)88%moderate

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