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September Weather in Henrietta, United States

Last updated: June 24, 2025

In Henrietta, United States, the average temperature in September is a warm 26°C (79°F). However, temperatures can fluctuate significantly, ranging from a cool 9°C (48°F) to a scorching 40°C (104°F). Expect about 95 mm (3.8 in) of precipitation over 6 days, with the humidity hovering around 64%. Stay prepared for both warmth and occasional rain!

September Temperature in Henrietta

In September in Henrietta, the average temperature is 26°C (79°F). Maximum temperatures can reach 40°C (104°F), while minimums can drop to as low as 9°C (48°F). Be prepared for a wide range of temperatures when traveling during this month.

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

The chart illustrates September temperature patterns in Henrietta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Henrietta, September typically has an average temperature of 26°C (79°F), with highs reaching up to 40°C (104°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec444659647482878679665449
Data source: Temperature data for Henrietta 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 Henrietta

In Henrietta in September, the precipitation amount is 95 mm (3.8 in) spread over a duration of 6 days.

September Precipitation Trends in Henrietta

The chart displays monthly precipitation patterns in Henrietta, 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 Henrietta, September typically receives around 95 mm (3.8 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec4255726911851225796884347
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Henrietta

In Henrietta in September, humidity is 64%. With an average temperature of 26°C (79°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as the air clings to your skin and the heat amplifies.

September Average Humidity in Henrietta

This chart illustrates the average monthly humidity levels in Henrietta, 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 Henrietta is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%74%75%80%80%75%67%64%70%82%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Henrietta

In Henrietta in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Henrietta.

Maximum UV Index Levels in Henrietta for September

The chart shows the monthly maximum UV Index (UVI) for Henrietta 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 Henrietta typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110854
Data source: Henrietta 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 Henrietta Compares to Other Months

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

This table compares monthly weather conditions in Henrietta, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)42 mm (1.7 inches)77%moderate
February Weather8°C (46°F)55 mm (2.2 inches)76%high
March Weather15°C (59°F)72 mm (2.8 inches)74%very high
April Weather18°C (65°F)69 mm (2.7 inches)75%very high
May Weather23°C (74°F)118 mm (4.6 inches)80%extreme
June Weather28°C (83°F)51 mm (2.0 inches)80%extreme
July Weather31°C (87°F)22 mm (0.9 inches)75%extreme
August Weather30°C (86°F)57 mm (2.3 inches)67%extreme
September Weather26°C (79°F)95 mm (3.8 inches)64%very high
October Weather19°C (66°F)87 mm (3.4 inches)70%very high
November Weather12°C (55°F)42 mm (1.7 inches)82%moderate
December Weather9°C (49°F)47 mm (1.8 inches)85%moderate

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