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September Weather in Bonne Terre, United States

Last updated: June 24, 2025

In Bonne Terre, United States, the average temperature in September is a pleasant 22°C (72°F). Expect a range from a cool 7°C (46°F) to a warm 34°C (94°F). During this time, precipitation averages 68 mm (2.7 in) over the course of 7 days, with an average humidity of 68%. Whether you're enjoying the sunshine or the occasional rain, this month brings a lovely climate!

September Temperature in Bonne Terre

In September in Bonne Terre, the average temperature is 22°C (72°F). Maximum temperatures can reach 34°C (94°F) while minimum temperatures can drop as low as 7°C (46°F). This makes Bonne Terre an ideal destination for travelers seeking pleasant weather and the chance to experience a wide range of outdoor activities.

September Weather in Bonne Terre: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Bonne Terre, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bonne Terre, 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 7°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec343748556675797672594540
Data source: Temperature data for Bonne Terre 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 Bonne Terre

In Bonne Terre in September, the precipitation amount is 68 mm (2.7 in) over the course of 7 days.

September Precipitation Trends in Bonne Terre

The chart displays monthly precipitation patterns in Bonne Terre, 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 Bonne Terre, September typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec77921321501518588117681117368
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bonne Terre

In Bonne Terre in September humidity is 68%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, slightly stifling but still manageable for traveling, creating an atmosphere that encourages leisurely outdoor activities while prompting occasional breaks for refreshment.

September Average Humidity in Bonne Terre

This chart illustrates the average monthly humidity levels in Bonne Terre, 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 Bonne Terre is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%81%80%80%83%83%76%69%68%72%83%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bonne Terre

In Bonne Terre 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 Bonne Terre.

Maximum UV Index Levels in Bonne Terre for September

The chart shows the monthly maximum UV Index (UVI) for Bonne Terre 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 Bonne Terre typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679111111109753
Data source: Bonne Terre 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 Bonne Terre Compares to Other Months

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

This table compares monthly weather conditions in Bonne Terre, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)77 mm (3.0 inches)83%moderate
February Weather3°C (37°F)92 mm (3.6 inches)81%high
March Weather9°C (48°F)131 mm (5.2 inches)80%high
April Weather13°C (55°F)150 mm (5.9 inches)80%very high
May Weather19°C (67°F)151 mm (5.9 inches)83%extreme
June Weather24°C (76°F)85 mm (3.4 inches)83%extreme
July Weather26°C (79°F)88 mm (3.5 inches)76%extreme
August Weather24°C (76°F)117 mm (4.6 inches)69%very high
September Weather22°C (72°F)68 mm (2.7 inches)68%very high
October Weather15°C (59°F)111 mm (4.4 inches)72%high
November Weather7°C (45°F)73 mm (2.9 inches)83%moderate
December Weather4°C (40°F)67 mm (2.7 inches)86%moderate

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