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September Weather in Geneseo, United States

Last updated: June 24, 2025

In September, the average temperature in Geneseo, United States hovers around 17°C (64°F). Be prepared for a wide range of temperatures, with minimums dipping to 2°C (35°F) and maximums soaring up to 32°C (90°F). Expect approximately 72 mm (2.8 in) of precipitation spread across 8 days, contributing to an average humidity of 76%. Stay comfortable and enjoy the diverse weather!

September Temperature in Geneseo

In September, in Geneseo, the average temperature is 17°C (64°F). The maximum can reach 32°C (90°F), while the minimum can drop as low as 2°C (35°F). Overall, it's a great time to visit for varied weather conditions and outdoor activities.

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

The chart illustrates September temperature patterns in Geneseo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Geneseo, September typically has an average temperature of 17°C (64°F), with highs reaching up to 32°C (90°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec262834455867717063533831
Data source: Temperature data for Geneseo 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 Geneseo

In Geneseo in September, the precipitation amount is 72 mm (2.8 in) over the course of 8 days.

September Precipitation Trends in Geneseo

The chart displays monthly precipitation patterns in Geneseo, 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 Geneseo, September typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec7480721081138412783721318286
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Geneseo

In Geneseo in September, humidity is 76%. With an average temperature of 17°C (64°F), this humidity feels like a warm, sticky embrace that can make outdoor activities feel sluggish and draining, challenging travelers to stay hydrated and seek respite in shaded areas or air-conditioned spaces.

September Average Humidity in Geneseo

This chart illustrates the average monthly humidity levels in Geneseo, 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 Geneseo is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Geneseo

In Geneseo 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 Geneseo.

Maximum UV Index Levels in Geneseo for September

The chart shows the monthly maximum UV Index (UVI) for Geneseo 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 Geneseo typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810101098642
Data source: Geneseo 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 Geneseo Compares to Other Months

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

This table compares monthly weather conditions in Geneseo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)74 mm (2.9 inches)91%moderate
February Weather-2°C (28°F)80 mm (3.1 inches)91%moderate
March Weather1°C (35°F)72 mm (2.8 inches)88%high
April Weather7°C (46°F)107 mm (4.2 inches)88%very high
May Weather14°C (58°F)113 mm (4.4 inches)82%very high
June Weather19°C (67°F)84 mm (3.3 inches)79%very high
July Weather22°C (72°F)127 mm (5.0 inches)77%very high
August Weather21°C (70°F)83 mm (3.3 inches)72%very high
September Weather17°C (64°F)72 mm (2.8 inches)76%very high
October Weather12°C (53°F)131 mm (5.2 inches)83%high
November Weather3°C (39°F)82 mm (3.2 inches)88%moderate
December Weather-1°C (31°F)86 mm (3.4 inches)87%low

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