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September Weather in Cooperstown, United States

Last updated: June 24, 2025

In Cooperstown, United States, the average temperature in September hovers around 15°C (59°F), offering a mild climate for residents and visitors alike. Temperatures can vary significantly, dipping to a chilly -2°C (28°F) at night and soaring to a warm 32°C (90°F) during the day. Expect 71 mm (2.8 in) of precipitation spread over 8 days, contributing to an average humidity of 72%, creating a refreshing atmosphere throughout the month.

September Temperature in Cooperstown

In September in Cooperstown, the average temperature is 15°C (59°F), with maximums reaching 32°C (90°F) and minimums dropping as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates September temperature patterns in Cooperstown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cooperstown, September typically has an average temperature of 15°C (59°F), with highs reaching up to 32°C (90°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec9726385467716759422717
Data source: Temperature data for Cooperstown 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 Cooperstown

In Cooperstown in September, the precipitation amount is 71 mm (2.8 in) over the course of 8 days.

September Precipitation Trends in Cooperstown

The chart displays monthly precipitation patterns in Cooperstown, 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 Cooperstown, September typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec171924375182657871792236
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cooperstown

In Cooperstown in September humidity is 72%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket wrapping around you, creating a sultry atmosphere that can make traveling a bit uncomfortable. The stickiness in the air can leave you feeling sluggish, so it’s advisable to stay hydrated and take breaks often while exploring.

September Average Humidity in Cooperstown

This chart illustrates the average monthly humidity levels in Cooperstown, 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 Cooperstown is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%89%82%79%74%78%76%77%72%74%85%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cooperstown

In Cooperstown in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Cooperstown.

Maximum UV Index Levels in Cooperstown for September

The chart shows the monthly maximum UV Index (UVI) for Cooperstown 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 Cooperstown typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458810987532
Data source: Cooperstown 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 Cooperstown Compares to Other Months

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

This table compares monthly weather conditions in Cooperstown, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-13°C (10°F)17 mm (0.7 inches)87%low
February Weather-14°C (8°F)19 mm (0.7 inches)89%moderate
March Weather-4°C (26°F)24 mm (1.0 inches)82%moderate
April Weather3°C (38°F)37 mm (1.4 inches)79%very high
May Weather12°C (55°F)51 mm (2.0 inches)74%very high
June Weather20°C (67°F)82 mm (3.2 inches)78%very high
July Weather22°C (71°F)65 mm (2.6 inches)76%very high
August Weather19°C (67°F)78 mm (3.1 inches)77%very high
September Weather15°C (59°F)71 mm (2.8 inches)72%high
October Weather6°C (43°F)79 mm (3.1 inches)74%moderate
November Weather-3°C (27°F)22 mm (0.9 inches)85%moderate
December Weather-9°C (17°F)36 mm (1.4 inches)84%low

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