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September Weather in Holbrook, United States

Last updated: June 24, 2025

In Holbrook, United States, the average temperature in September is a comfortable 23°C (73°F). However, temperatures can fluctuate significantly, with a minimum of 2°C (35°F) and soaring up to a maximum of 37°C (99°F). During this month, expect precipitation of about 12 mm (0.5 in) over 1 day and an average humidity level of 59%.

September Temperature in Holbrook

In September in Holbrook, the average temperature is 23°C (73°F), with maximums reaching 37°C (99°F) and minimums dropping as low as 2°C (35°F). It's advisable to pack for both warm days and cooler nights while exploring.

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

The chart illustrates September temperature patterns in Holbrook, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Holbrook, September typically has an average temperature of 23°C (73°F), with highs reaching up to 37°C (99°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec374149596678818073584737
Data source: Temperature data for Holbrook 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 Holbrook

In Holbrook in September, the precipitation amount is 12 mm (0.5 in) over the course of 1 day.

September Precipitation Trends in Holbrook

The chart displays monthly precipitation patterns in Holbrook, 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 Holbrook, September typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec1821241384311012241018
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Holbrook

In Holbrook in September, humidity is 59%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, making traveling comfortable yet slightly sticky, perfect for leisurely strolls but best accompanied by plenty of water to stay refreshed.

September Average Humidity in Holbrook

This chart illustrates the average monthly humidity levels in Holbrook, 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 Holbrook is approximately 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%83%72%63%46%35%33%41%59%70%79%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Holbrook

In Holbrook 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 Holbrook.

Maximum UV Index Levels in Holbrook for September

The chart shows the monthly maximum UV Index (UVI) for Holbrook 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 Holbrook typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111213121211864
Data source: Holbrook 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 Holbrook Compares to Other Months

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

This table compares monthly weather conditions in Holbrook, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)18 mm (0.7 inches)80%moderate
February Weather5°C (42°F)21 mm (0.8 inches)83%high
March Weather9°C (49°F)24 mm (0.9 inches)72%very high
April Weather15°C (59°F)13 mm (0.5 inches)63%extreme
May Weather19°C (66°F)8 mm (0.3 inches)46%extreme
June Weather26°C (79°F)4 mm (0.2 inches)35%extreme
July Weather27°C (81°F)31 mm (1.2 inches)33%extreme
August Weather27°C (80°F)10 mm (0.4 inches)41%extreme
September Weather23°C (73°F)12 mm (0.5 inches)59%extreme
October Weather14°C (58°F)23 mm (0.9 inches)70%very high
November Weather8°C (47°F)10 mm (0.4 inches)79%high
December Weather3°C (37°F)18 mm (0.7 inches)82%moderate

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