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September Weather in Bella Vista, United States

Last updated: June 24, 2025

In September, the average temperature in Bella Vista, United States is a pleasant 23°C (74°F). Expect a comfortable range, with minimums dipping to 7°C (45°F) and maxims soaring up to 34°C (93°F). Be prepared for some rain, as the area receives about 65 mm (2.5 in) of precipitation over 7 days. With an average humidity of 64%, it's ideal for enjoying the delightful ambiance of the season.

September Temperature in Bella Vista

In September in Bella Vista, the average temperature is 23°C (74°F). Maximums can reach 34°C (93°F), while minimums can drop as low as 7°C (45°F). This variability means travelers should pack for both warm days and cool evenings.

September Weather in Bella Vista: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Bella Vista, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bella Vista, September typically has an average temperature of 23°C (74°F), with highs reaching up to 34°C (93°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec373951576776797773604843
Data source: Temperature data for Bella Vista 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 Bella Vista

In Bella Vista in September, the precipitation amount is 65 mm (2.5 in) over a span of 7 days.

September Precipitation Trends in Bella Vista

The chart displays monthly precipitation patterns in Bella Vista, 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 Bella Vista, September typically receives around 65 mm (2.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec89951531811729899139651666865
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bella Vista

In Bella Vista in September, humidity is 64%. With an average temperature of 23°C (74°F), this humidity feels like a warm blanket wrapping around you, making outdoor exploration enjoyable yet slightly sticky, so it's best to stay hydrated and take breaks in the shade while traveling.

September Average Humidity in Bella Vista

This chart illustrates the average monthly humidity levels in Bella Vista, 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 Bella Vista is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%78%83%83%78%68%64%70%83%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bella Vista

In Bella Vista 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 Bella Vista.

Maximum UV Index Levels in Bella Vista for September

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

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

This table compares monthly weather conditions in Bella Vista, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)89 mm (3.5 inches)81%moderate
February Weather4°C (40°F)95 mm (3.8 inches)78%high
March Weather10°C (51°F)153 mm (6.0 inches)76%high
April Weather14°C (57°F)181 mm (7.1 inches)78%very high
May Weather19°C (67°F)172 mm (6.8 inches)83%very high
June Weather24°C (76°F)98 mm (3.9 inches)83%extreme
July Weather26°C (79°F)99 mm (3.9 inches)78%extreme
August Weather25°C (77°F)139 mm (5.5 inches)68%very high
September Weather23°C (74°F)65 mm (2.5 inches)64%very high
October Weather15°C (60°F)166 mm (6.5 inches)70%high
November Weather9°C (48°F)68 mm (2.7 inches)83%moderate
December Weather6°C (43°F)64 mm (2.5 inches)87%moderate

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