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September Weather in Millerstown, United States

Last updated: June 24, 2025

In Millerstown, United States, the average temperature for September hovers around 20°C (68°F). Expect a cozy minimum of 4°C (39°F) and a warm maximum of 33°C (92°F). Be prepared for some rain, as precipitation typically reaches 130 mm (5.1 in) over about 10 days. With an average humidity of 66%, it’s a month that embraces both warmth and the refreshing touch of nature.

September Temperature in Millerstown

In September in Millerstown, the average temperature is 20°C (68°F). Maximum temperatures can reach up to 33°C (92°F), while minimums can drop as low as 4°C (39°F). It's a great time for travelers to enjoy mild weather and plan outdoor activities.

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

The chart illustrates September temperature patterns in Millerstown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Millerstown, September typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec323441526271777468574336
Data source: Temperature data for Millerstown 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 Millerstown

In Millerstown in September, the precipitation amount is 130 mm (5.1 in) over a period of 10 days.

September Precipitation Trends in Millerstown

The chart displays monthly precipitation patterns in Millerstown, 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 Millerstown, September typically receives around 130 mm (5.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec6710293103123981261061301168789
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Millerstown

In Millerstown in September, humidity is 66%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making outdoor activities enjoyable but potentially a bit sticky, so travelers should stay hydrated and consider light, breathable clothing for comfort.

September Average Humidity in Millerstown

This chart illustrates the average monthly humidity levels in Millerstown, 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 Millerstown is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%85%83%75%74%65%62%66%79%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Millerstown

In Millerstown in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Millerstown.

Maximum UV Index Levels in Millerstown for September

The chart shows the monthly maximum UV Index (UVI) for Millerstown 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 Millerstown typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Millerstown 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 Millerstown Compares to Other Months

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

This table compares monthly weather conditions in Millerstown, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)67 mm (2.6 inches)87%moderate
February Weather1°C (35°F)102 mm (4.0 inches)85%moderate
March Weather5°C (41°F)93 mm (3.7 inches)85%high
April Weather11°C (52°F)103 mm (4.1 inches)83%very high
May Weather17°C (62°F)123 mm (4.8 inches)75%very high
June Weather22°C (71°F)98 mm (3.9 inches)73%very high
July Weather25°C (77°F)126 mm (5.0 inches)65%very high
August Weather24°C (75°F)106 mm (4.2 inches)62%very high
September Weather20°C (68°F)130 mm (5.1 inches)66%very high
October Weather14°C (58°F)116 mm (4.6 inches)79%high
November Weather6°C (43°F)87 mm (3.4 inches)87%moderate
December Weather2°C (36°F)89 mm (3.5 inches)85%low

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