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September Weather in Briarcliff, United States

Last updated: June 24, 2025

In September, the average temperature in Briarcliff, United States hovers around 26°C (79°F). Expect minimums that can dip to 11°C (51°F), while the mercury may soar as high as 38°C (101°F). Be prepared for 102 mm (4.0 in) of precipitation spread over 10 days, accompanied by a comfortable average humidity of 66%.

September Temperature in Briarcliff

In September in Briarcliff, the average temperature is 26°C (79°F), with maximums reaching 38°C (101°F) and minimums dropping as low as 11°C (51°F). This pleasant weather makes Briarcliff an ideal destination for travelers looking to enjoy both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Briarcliff, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Briarcliff, September typically has an average temperature of 26°C (79°F), with highs reaching up to 38°C (101°F) and lows dropping to around 11°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec515263687682858579705954
Data source: Temperature data for Briarcliff 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 Briarcliff

In Briarcliff in September, the total precipitation amount is 102 mm (4.0 in) falling over the course of 10 days.

September Precipitation Trends in Briarcliff

The chart displays monthly precipitation patterns in Briarcliff, 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 Briarcliff, September typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec45576280152766598102933855
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Briarcliff

In Briarcliff in September, humidity is 66%. With an average temperature of 26°C (79°F), this humidity feels like a warm, enveloping blanket, making outdoor activities invigorating yet requiring occasional breaks in the shade to stay comfortable while traveling.

September Average Humidity in Briarcliff

This chart illustrates the average monthly humidity levels in Briarcliff, 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 Briarcliff is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%78%77%78%82%78%69%63%66%73%84%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Briarcliff

In Briarcliff in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Briarcliff.

Maximum UV Index Levels in Briarcliff for September

The chart shows the monthly maximum UV Index (UVI) for Briarcliff 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 Briarcliff typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121111964
Data source: Briarcliff 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 Briarcliff Compares to Other Months

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

This table compares monthly weather conditions in Briarcliff, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)45 mm (1.8 inches)78%moderate
February Weather11°C (53°F)57 mm (2.2 inches)78%high
March Weather17°C (63°F)62 mm (2.4 inches)77%very high
April Weather20°C (68°F)80 mm (3.2 inches)78%extreme
May Weather24°C (76°F)152 mm (6.0 inches)82%extreme
June Weather28°C (82°F)76 mm (3.0 inches)78%extreme
July Weather29°C (85°F)65 mm (2.6 inches)69%extreme
August Weather30°C (86°F)98 mm (3.9 inches)63%extreme
September Weather26°C (79°F)102 mm (4.0 inches)66%extreme
October Weather21°C (70°F)93 mm (3.7 inches)73%very high
November Weather15°C (59°F)38 mm (1.5 inches)84%high
December Weather12°C (54°F)55 mm (2.1 inches)87%moderate

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