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September Weather in Holly, United States

Last updated: June 24, 2025

In Holly, United States, the average temperature in September hovers around 22°C (72°F). However, temperatures can vary significantly, with a minimum of 2°C (36°F) and a sweltering maximum of 39°C (102°F). This month also brings about 35 mm (1.4 in) of precipitation over approximately 4 days. Expect a cozy average humidity of 79%, adding a touch of moisture to the air.

September Temperature in Holly

In September in Holly, the average temperature is 22°C (72°F). Maximums can reach 39°C (102°F), while minimums can dip as low as 2°C (36°F). This variation in temperature makes Holly a destination where travelers should be prepared for both warm days and cool nights.

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

The chart illustrates September temperature patterns in Holly, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Holly, September typically has an average temperature of 22°C (72°F), with highs reaching up to 39°C (102°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec343447546376807772554536
Data source: Temperature data for Holly 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 Holly

In Holly in September, the precipitation amount is 35 mm (1.4 in) over a span of 4 days.

September Precipitation Trends in Holly

The chart displays monthly precipitation patterns in Holly, 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 Holly, September typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec161634368043495535251014
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Holly

In Holly in September humidity is 79%. With an average temperature of 22°C (72°F), this humidity feels like you are enveloped in a warm, heavy blanket, making it feel considerably hotter and adding a layer of stickiness to your skin as you navigate through the streets.

September Average Humidity in Holly

This chart illustrates the average monthly humidity levels in Holly, 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 Holly is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%77%65%67%81%82%82%84%79%75%79%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Holly

In Holly 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 Holly.

Maximum UV Index Levels in Holly for September

The chart shows the monthly maximum UV Index (UVI) for Holly 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 Holly typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec458101112121110753
Data source: Holly 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 Holly Compares to Other Months

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

This table compares monthly weather conditions in Holly, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)16 mm (0.6 inches)74%moderate
February Weather1°C (34°F)16 mm (0.6 inches)77%moderate
March Weather8°C (47°F)33 mm (1.3 inches)65%very high
April Weather12°C (54°F)36 mm (1.4 inches)67%very high
May Weather17°C (64°F)80 mm (3.1 inches)81%extreme
June Weather25°C (76°F)43 mm (1.7 inches)82%extreme
July Weather26°C (80°F)49 mm (1.9 inches)82%extreme
August Weather25°C (77°F)55 mm (2.2 inches)84%extreme
September Weather22°C (72°F)35 mm (1.4 inches)79%very high
October Weather13°C (55°F)25 mm (1.0 inches)75%high
November Weather7°C (45°F)10 mm (0.4 inches)79%moderate
December Weather2°C (37°F)14 mm (0.6 inches)83%moderate

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