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September Weather in Boonville, United States

Last updated: June 24, 2025

In September, the average temperature in Boonville, United States hovers around 23°C (73°F), making it a pleasant time to explore. However, temperatures can vary, with a minimum of 9°C (48°F) and a maximum reaching up to 35°C (95°F). Be prepared for the chance of rain, as 86 mm (3.4 in) of precipitation may occur over 7 days. Additionally, the average humidity sits at a comfortable 71%, ensuring a refreshing atmosphere during your visit.

September Temperature in Boonville

In September in Boonville, the average temperature is 23°C (73°F). The maximum can reach 35°C (95°F), while the minimum can drop to as low as 9°C (48°F). This variety in temperatures makes Boonville an ideal destination for travelers seeking a mix of warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Boonville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boonville, September typically has an average temperature of 23°C (73°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec363949576977807873614641
Data source: Temperature data for Boonville 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 Boonville

In Boonville in September, the total precipitation amount is 86 mm (3.4 in) over a span of 7 days.

September Precipitation Trends in Boonville

The chart displays monthly precipitation patterns in Boonville, 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 Boonville, September typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec9412413912013411881848612193105
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Boonville

In Boonville in September humidity is 71%. With an average temperature of 23°C (73°F), this humidity feels like a warm, sticky embrace, making outdoor exploration slightly uncomfortable but still manageable if you stay hydrated and plan for breaks in shaded areas.

September Average Humidity in Boonville

This chart illustrates the average monthly humidity levels in Boonville, 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 Boonville is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Boonville

In Boonville 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 Boonville.

Maximum UV Index Levels in Boonville for September

The chart shows the monthly maximum UV Index (UVI) for Boonville 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 Boonville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3571010111099743
Data source: Boonville 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 Boonville Compares to Other Months

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

This table compares monthly weather conditions in Boonville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)94 mm (3.7 inches)87%moderate
February Weather4°C (40°F)124 mm (4.9 inches)86%moderate
March Weather9°C (49°F)139 mm (5.5 inches)86%high
April Weather14°C (57°F)120 mm (4.7 inches)82%very high
May Weather21°C (69°F)134 mm (5.3 inches)82%very high
June Weather25°C (77°F)118 mm (4.6 inches)83%extreme
July Weather27°C (80°F)81 mm (3.2 inches)80%very high
August Weather25°C (78°F)84 mm (3.3 inches)74%very high
September Weather23°C (73°F)86 mm (3.4 inches)71%very high
October Weather16°C (62°F)121 mm (4.8 inches)78%high
November Weather8°C (46°F)93 mm (3.7 inches)88%moderate
December Weather5°C (42°F)105 mm (4.1 inches)88%moderate

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