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September Weather in Rock Port, United States

Last updated: June 24, 2025

In September, the average temperature in Rock Port, United States sits comfortably at 21°C (71°F). Expect fluctuations between a chilly 6°C (43°F) and a warm 35°C (96°F). With an average precipitation of 97 mm (3.8 in) spread over 9 days, and humidity levels around 75%, be prepared for a mix of pleasant warmth and refreshing showers.

September Temperature in Rock Port

In September in Rock Port, the average temperature is 21°C (71°F), with maximums reaching 35°C (96°F) and minimums dropping as low as 6°C (43°F). This diverse temperature range makes it ideal for travelers looking to enjoy both warm days and cooler evenings.

September Weather in Rock Port: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Rock Port, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rock Port, September typically has an average temperature of 21°C (71°F), with highs reaching up to 35°C (96°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec272843526477797570544134
Data source: Temperature data for Rock Port 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 Rock Port

In Rock Port in September, the total precipitation amount reaches 97 mm (3.8 in) over the course of 9 days.

September Precipitation Trends in Rock Port

The chart displays monthly precipitation patterns in Rock Port, 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 Rock Port, September typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec36329377154118105116971423434
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rock Port

In Rock Port in September, humidity is 75%. With an average temperature of 21°C (71°F), this humidity feels like a warm blanket wrapping around you, making travel slightly uncomfortable but offering a lush, vibrant atmosphere that invites exploration at a leisurely pace.

September Average Humidity in Rock Port

This chart illustrates the average monthly humidity levels in Rock Port, 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 Rock Port is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%73%75%78%82%83%81%75%75%82%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rock Port

In Rock Port 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 Rock Port.

Maximum UV Index Levels in Rock Port for September

The chart shows the monthly maximum UV Index (UVI) for Rock Port 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 Rock Port typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
Data source: Rock Port 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 Rock Port Compares to Other Months

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

This table compares monthly weather conditions in Rock Port, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)36 mm (1.4 inches)76%moderate
February Weather-2°C (28°F)32 mm (1.3 inches)80%moderate
March Weather6°C (44°F)93 mm (3.7 inches)73%high
April Weather11°C (52°F)77 mm (3.0 inches)74%very high
May Weather18°C (65°F)154 mm (6.1 inches)78%very high
June Weather25°C (77°F)118 mm (4.6 inches)82%extreme
July Weather26°C (79°F)105 mm (4.1 inches)83%very high
August Weather24°C (76°F)116 mm (4.6 inches)80%very high
September Weather21°C (71°F)97 mm (3.8 inches)75%very high
October Weather12°C (55°F)142 mm (5.6 inches)75%high
November Weather5°C (42°F)34 mm (1.4 inches)82%moderate
December Weather1°C (34°F)34 mm (1.3 inches)83%moderate

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