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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 18°C (65°F). Expect a range with minimums dipping to 2°C (35°F) and maximums soaring up to 34°C (93°F). Precipitation during this period totals about 80 mm (3.2 in), spread across approximately 10 days. The air is likely to feel quite humid, with average humidity levels reaching 80%.

September Temperature in Holly

In September in Holly, the average temperature is 18°C (65°F). Maximums can reach 34°C (93°F), and minimums can be as low as 2°C (35°F). Be prepared for a wide range of temperatures when traveling during this month, so pack accordingly!

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 18°C (65°F), with highs reaching up to 34°C (93°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec252736465969747265533832
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 80 mm (3.2 in) over a span of 10 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 80 mm (3.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec636669921071048579801076954
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 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
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 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 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
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 Weather-4°C (26°F)63 mm (2.5 inches)88%low
February Weather-3°C (27°F)66 mm (2.6 inches)87%moderate
March Weather2°C (36°F)69 mm (2.7 inches)85%moderate
April Weather8°C (46°F)91 mm (3.6 inches)86%very high
May Weather15°C (59°F)107 mm (4.2 inches)80%very high
June Weather21°C (69°F)104 mm (4.1 inches)80%very high
July Weather23°C (74°F)85 mm (3.3 inches)80%very high
August Weather22°C (72°F)79 mm (3.1 inches)80%very high
September Weather18°C (65°F)80 mm (3.2 inches)80%high
October Weather12°C (53°F)107 mm (4.2 inches)84%moderate
November Weather3°C (39°F)69 mm (2.7 inches)89%moderate
December Weather0°C (32°F)54 mm (2.1 inches)86%low

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