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September Weather in Oneonta, United States

Last updated: June 24, 2025

In September, the average temperature in Oneonta, United States is a comfortable 16°C (61°F), with temperatures ranging from a chilly 0°C (32°F) to a warm 30°C (87°F). Expect 98 mm (3.9 in) of precipitation spread over about 10 days, contributing to an average humidity level of 78%. Enjoy the climate while preparing for the occasional shower!

September Temperature in Oneonta

In September in Oneonta, the average temperature is 16°C (61°F). Maximums can reach 30°C (87°F), while minimums can plummet to as low as 0°C (32°F). This variety in temperatures makes Oneonta an ideal destination for travelers seeking both warm and cool experiences.

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

The chart illustrates September temperature patterns in Oneonta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oneonta, September typically has an average temperature of 16°C (61°F), with highs reaching up to 30°C (87°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec232632445664706861513629
Data source: Temperature data for Oneonta 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 Oneonta

In Oneonta in September, the total precipitation amount is 98 mm (3.9 in) recorded over a span of 10 days.

September Precipitation Trends in Oneonta

The chart displays monthly precipitation patterns in Oneonta, 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 Oneonta, September typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec8196871151201051231099815010194
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Oneonta

In Oneonta in September, humidity is 78%. With an average temperature of 16°C (61°F), this humidity feels like a warm, sticky embrace, making travel somewhat uncomfortable as it clings to your skin and creates a heavy atmosphere that can drain your energy.

September Average Humidity in Oneonta

This chart illustrates the average monthly humidity levels in Oneonta, 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 Oneonta is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Oneonta

In Oneonta in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Oneonta.

Maximum UV Index Levels in Oneonta for September

The chart shows the monthly maximum UV Index (UVI) for Oneonta 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 Oneonta typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346910101098642
Data source: Oneonta 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 Oneonta Compares to Other Months

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

This table compares monthly weather conditions in Oneonta, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)81 mm (3.2 inches)90%moderate
February Weather-3°C (26°F)96 mm (3.8 inches)90%moderate
March Weather0°C (32°F)87 mm (3.4 inches)87%high
April Weather7°C (44°F)115 mm (4.5 inches)88%very high
May Weather13°C (56°F)120 mm (4.7 inches)82%very high
June Weather18°C (65°F)104 mm (4.1 inches)79%very high
July Weather21°C (70°F)123 mm (4.9 inches)78%very high
August Weather20°C (68°F)109 mm (4.3 inches)76%very high
September Weather16°C (61°F)98 mm (3.9 inches)78%very high
October Weather11°C (51°F)150 mm (5.9 inches)84%high
November Weather2°C (37°F)101 mm (4.0 inches)89%moderate
December Weather-2°C (29°F)94 mm (3.7 inches)86%low

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