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September Weather in Millbrook, United States

Last updated: June 24, 2025

In September, the average temperature in Millbrook, United States is a comfortable 26°C (79°F). However, you can expect a minimum of 12°C (54°F) and a maximum that can soar up to 37°C (100°F). Be prepared for some rain, with precipitation averaging 87 mm (3.4 in) over about 8 days. The air feels quite humid, with an average humidity level of 73%.

September Temperature in Millbrook

In September in Millbrook, the average temperature is 26°C (79°F), with maximums reaching 37°C (100°F) and minimums dropping to as low as 12°C (54°F). This diverse temperature range makes Millbrook an ideal destination for travelers seeking both warmth and cooler evenings.

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

The chart illustrates September temperature patterns in Millbrook, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Millbrook, September typically has an average temperature of 26°C (79°F), with highs reaching up to 37°C (100°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec495560657479828279705652
Data source: Temperature data for Millbrook 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 Millbrook

In Millbrook in September, the precipitation amount is 87 mm (3.4 in), which occurs over a span of 8 days.

September Precipitation Trends in Millbrook

The chart displays monthly precipitation patterns in Millbrook, 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 Millbrook, September typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec12212811012111811393938711575138
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Millbrook

In Millbrook in September, humidity is 73%. With an average temperature of 26°C (79°F), this humidity feels like a warm, sticky embrace, making travel slightly uncomfortable as you navigate through the heat with a constant sheen of sweat on your skin.

September Average Humidity in Millbrook

This chart illustrates the average monthly humidity levels in Millbrook, 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 Millbrook is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%81%77%77%72%73%73%85%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Millbrook

In Millbrook 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 Millbrook.

Maximum UV Index Levels in Millbrook for September

The chart shows the monthly maximum UV Index (UVI) for Millbrook 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 Millbrook typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111110864
Data source: Millbrook 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 Millbrook Compares to Other Months

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

This table compares monthly weather conditions in Millbrook, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)122 mm (4.8 inches)85%moderate
February Weather13°C (56°F)128 mm (5.0 inches)84%high
March Weather16°C (60°F)110 mm (4.3 inches)82%very high
April Weather19°C (66°F)121 mm (4.8 inches)82%very high
May Weather24°C (75°F)118 mm (4.6 inches)81%extreme
June Weather26°C (80°F)113 mm (4.5 inches)77%extreme
July Weather28°C (83°F)93 mm (3.7 inches)77%extreme
August Weather28°C (82°F)93 mm (3.7 inches)72%extreme
September Weather26°C (79°F)87 mm (3.4 inches)73%very high
October Weather21°C (70°F)115 mm (4.5 inches)73%very high
November Weather13°C (56°F)75 mm (3.0 inches)85%high
December Weather11°C (52°F)138 mm (5.4 inches)88%moderate

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