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September Weather in Bartlesville, United States

Last updated: June 24, 2025

In September, the average temperature in Bartlesville, United States hovers around 24°C (76°F), with a minimum dipping to 6°C (43°F) and peaking at a warm 36°C (96°F). Expect approximately 87 mm (3.4 in) of precipitation over 7 days, all set against an average humidity of 67%. Be prepared for a mix of warm days and refreshing showers!

September Temperature in Bartlesville

In September in Bartlesville, the average temperature is 24°C (76°F), with maximums reaching up to 36°C (96°F) and minimums dipping down to 6°C (43°F). Be prepared for a diverse range of temperatures during your travels!

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

The chart illustrates September temperature patterns in Bartlesville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bartlesville, September typically has an average temperature of 24°C (76°F), with highs reaching up to 36°C (96°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec373952586879828075614842
Data source: Temperature data for Bartlesville 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 Bartlesville

In Bartlesville in September, the precipitation amount is 87 mm (3.4 in) over a span of 7 days.

September Precipitation Trends in Bartlesville

The chart displays monthly precipitation patterns in Bartlesville, 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 Bartlesville, September typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec645511510722010185107871364336
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bartlesville

In Bartlesville in September humidity is 67%. With an average temperature of 24°C (76°F), this humidity feels like a warm, steamy embrace, making travel slightly more challenging as you navigate through the thick air.

September Average Humidity in Bartlesville

This chart illustrates the average monthly humidity levels in Bartlesville, 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 Bartlesville is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%71%74%83%83%81%73%67%72%82%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bartlesville

In Bartlesville 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 Bartlesville.

Maximum UV Index Levels in Bartlesville for September

The chart shows the monthly maximum UV Index (UVI) for Bartlesville 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 Bartlesville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Bartlesville 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 Bartlesville Compares to Other Months

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

This table compares monthly weather conditions in Bartlesville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)64 mm (2.5 inches)77%moderate
February Weather4°C (39°F)54 mm (2.1 inches)76%high
March Weather11°C (52°F)115 mm (4.5 inches)71%high
April Weather15°C (58°F)107 mm (4.2 inches)73%very high
May Weather20°C (69°F)220 mm (8.7 inches)83%very high
June Weather26°C (79°F)101 mm (4.0 inches)83%extreme
July Weather28°C (82°F)85 mm (3.4 inches)81%extreme
August Weather26°C (80°F)107 mm (4.2 inches)73%very high
September Weather24°C (76°F)87 mm (3.4 inches)67%very high
October Weather16°C (61°F)136 mm (5.4 inches)72%high
November Weather9°C (49°F)43 mm (1.7 inches)82%moderate
December Weather6°C (43°F)36 mm (1.4 inches)85%moderate

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