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September Weather in Seneca, United States

Last updated: June 24, 2025

In September, the average temperature in Seneca, United States hovers around 23°C (74°F). Expect a refreshing range, with minimums dipping to 10°C (50°F) and maximums soaring to 35°C (96°F). Keep in mind that precipitation can reach 132 mm (5.2 in) over the course of 9 days, and the average humidity is a comfortable 76%.

September Temperature in Seneca

In September in Seneca, the average temperature is 23°C (74°F). Maximum temperatures can reach up to 35°C (96°F), while minimum temperatures can drop as low as 10°C (50°F). This makes Seneca a pleasant destination for travelers seeking warm days and cool nights.

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

The chart illustrates September temperature patterns in Seneca, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seneca, September typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (96°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec444954616975797874645147
Data source: Temperature data for Seneca 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 Seneca

In Seneca in September, the total precipitation amount is 132 mm (5.2 in) over a span of 9 days.

September Precipitation Trends in Seneca

The chart displays monthly precipitation patterns in Seneca, 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 Seneca, September typically receives around 132 mm (5.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec117167121136141929212713216797151
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Seneca

In Seneca in September humidity is 76%. With an average temperature of 23°C (74°F), this humidity feels like a warm, thick blanket wrapping around you, making outdoor exploration feel a bit sluggish and requiring frequent breaks for hydration and respite from the heat.

September Average Humidity in Seneca

This chart illustrates the average monthly humidity levels in Seneca, 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 Seneca is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Seneca

In Seneca 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 Seneca.

Maximum UV Index Levels in Seneca for September

The chart shows the monthly maximum UV Index (UVI) for Seneca 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 Seneca typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47811111111109864
Data source: Seneca 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 Seneca Compares to Other Months

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

This table compares monthly weather conditions in Seneca, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)117 mm (4.6 inches)86%moderate
February Weather9°C (49°F)167 mm (6.6 inches)86%high
March Weather12°C (54°F)121 mm (4.7 inches)86%very high
April Weather16°C (61°F)136 mm (5.4 inches)82%extreme
May Weather21°C (70°F)141 mm (5.5 inches)85%extreme
June Weather24°C (76°F)92 mm (3.6 inches)85%extreme
July Weather26°C (80°F)92 mm (3.6 inches)83%extreme
August Weather26°C (78°F)127 mm (5.0 inches)76%very high
September Weather23°C (74°F)132 mm (5.2 inches)76%very high
October Weather18°C (65°F)167 mm (6.6 inches)80%very high
November Weather11°C (52°F)97 mm (3.8 inches)88%high
December Weather8°C (47°F)151 mm (6.0 inches)88%moderate

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