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September Weather in Jasper, United States

Last updated: June 24, 2025

In September, the average temperature in Jasper, United States hovers around 22°C (72°F). Expect a wide temperature range, with minimums dipping to 8°C (46°F) and maximums soaring up to 34°C (94°F). Be prepared for 81 mm (3.2 in) of precipitation over 8 days of this month. You'll also find the air fairly humid, with an average humidity of 69%.

September Temperature in Jasper

In September in Jasper, the average temperature is 22°C (72°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 8°C (46°F). This variety in temperatures makes it essential to pack layers to ensure comfort during your travels.

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 22°C (72°F), with highs reaching up to 34°C (94°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec343847566876797772604440
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 precipitation amount is 81 mm (3.2 in) over the course of 8 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 81 mm (3.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec9011915012714313779888110797107
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 69%. With an average temperature of 22°C (72°F), this humidity feels like a warm, enveloping blanket, making travel feel sticky and slightly oppressive, yet also invigorating as the air is thick with the scent of blooming flora and vibrant surroundings.

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 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
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 is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3571010111099643
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 Weather1°C (34°F)90 mm (3.5 inches)87%moderate
February Weather3°C (38°F)119 mm (4.7 inches)85%moderate
March Weather8°C (47°F)150 mm (5.9 inches)86%high
April Weather13°C (56°F)127 mm (5.0 inches)84%very high
May Weather20°C (68°F)143 mm (5.6 inches)79%very high
June Weather24°C (76°F)136 mm (5.4 inches)82%extreme
July Weather26°C (79°F)79 mm (3.1 inches)79%very high
August Weather25°C (77°F)88 mm (3.5 inches)70%very high
September Weather22°C (72°F)81 mm (3.2 inches)69%very high
October Weather16°C (61°F)107 mm (4.2 inches)76%high
November Weather7°C (45°F)96 mm (3.8 inches)88%moderate
December Weather4°C (40°F)107 mm (4.2 inches)87%moderate

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