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September Weather in Johnsonville, United States

Last updated: June 24, 2025

In Johnsonville, United States, the average temperature in September hovers around 24°C (75°F), offering a pleasant climate for exploration. Expect temperatures to range from a cool 12°C (54°F) to a warm 36°C (97°F). During this month, precipitation averages 108 mm (4.2 in) over 7 days, contributing to a 70% humidity level that adds a touch of tropical ambiance to the area.

September Temperature in Johnsonville

In September in Johnsonville, the average temperature is 24°C (75°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as 12°C (54°F). This pleasant range makes it an ideal time for travelers to explore the area's attractions while enjoying comfortable weather.

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

The chart illustrates September temperature patterns in Johnsonville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Johnsonville, September typically has an average temperature of 24°C (75°F), with highs reaching up to 36°C (97°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec414553597077817975645046
Data source: Temperature data for Johnsonville 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 Johnsonville

In Johnsonville in September, the precipitation amount is 108 mm (4.2 in) over the course of 7 days.

September Precipitation Trends in Johnsonville

The chart displays monthly precipitation patterns in Johnsonville, 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 Johnsonville, September typically receives around 108 mm (4.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec10517816016912311512511810812888136
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Johnsonville

In Johnsonville in September, humidity is 70%. With an average temperature of 24°C (75°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities a bit sluggish and sticky, ideal for leisurely strolls but requiring plenty of hydration.

September Average Humidity in Johnsonville

This chart illustrates the average monthly humidity levels in Johnsonville, 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 Johnsonville is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%81%83%83%80%74%70%73%85%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Johnsonville

In Johnsonville in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Johnsonville.

Maximum UV Index Levels in Johnsonville for September

The chart shows the monthly maximum UV Index (UVI) for Johnsonville 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 Johnsonville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Johnsonville 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 Johnsonville Compares to Other Months

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

This table compares monthly weather conditions in Johnsonville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)105 mm (4.1 inches)86%moderate
February Weather7°C (45°F)178 mm (7.0 inches)85%high
March Weather12°C (53°F)160 mm (6.3 inches)84%high
April Weather15°C (59°F)169 mm (6.7 inches)81%very high
May Weather21°C (70°F)123 mm (4.8 inches)83%very high
June Weather25°C (78°F)115 mm (4.5 inches)83%extreme
July Weather27°C (81°F)125 mm (4.9 inches)80%extreme
August Weather26°C (79°F)118 mm (4.7 inches)73%very high
September Weather24°C (75°F)108 mm (4.2 inches)70%very high
October Weather18°C (64°F)128 mm (5.1 inches)73%high
November Weather10°C (50°F)88 mm (3.5 inches)85%moderate
December Weather8°C (46°F)136 mm (5.4 inches)88%moderate

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