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September Weather in Junction City, United States

Last updated: June 24, 2025

The average temperature in Junction City, United States during September is 26°C (79°F), offering a pleasant climate. However, temperatures can vary significantly, with a minimum of 11°C (53°F) and a maximum soaring up to 39°C (103°F). Expect about 81 mm (3.2 in) of precipitation spread over 7 days, and enjoy an average humidity level of around 63% to keep the air refreshing.

September Temperature in Junction City

In September in Junction City, the average temperature is 26°C (79°F). Maximums can reach 39°C (103°F), and minimums can drop as low as 11°C (53°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

September Weather in Junction City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Junction City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Junction City, September typically has an average temperature of 26°C (79°F), with highs reaching up to 39°C (103°F) and lows dropping to around 11°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec475060647481838278675551
Data source: Temperature data for Junction City 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 Junction City

In Junction City in September, the precipitation amount is 81 mm (3.2 in) over a period of 7 days.

September Precipitation Trends in Junction City

The chart displays monthly precipitation patterns in Junction City, 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 Junction City, September typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec123161158183146120941048112870124
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Junction City

In Junction City in September humidity is 63%. With average temperature 26°C (79°F), this humidity feels like a warm embrace, making it perfect for leisurely strolls or exploring local attractions, though be prepared for a slight stickiness that may prompt you to seek shade or refreshing beverages along the way.

September Average Humidity in Junction City

This chart illustrates the average monthly humidity levels in Junction City, 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 Junction City is approximately 63%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%78%79%81%77%72%65%63%70%82%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Junction City

In Junction City 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 Junction City.

Maximum UV Index Levels in Junction City for September

The chart shows the monthly maximum UV Index (UVI) for Junction City 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 Junction City typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101112111110864
Data source: Junction City 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 Junction City Compares to Other Months

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

This table compares monthly weather conditions in Junction City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (48°F)123 mm (4.8 inches)82%moderate
February Weather10°C (51°F)161 mm (6.3 inches)80%high
March Weather16°C (60°F)158 mm (6.2 inches)78%very high
April Weather18°C (64°F)183 mm (7.2 inches)79%very high
May Weather23°C (74°F)146 mm (5.8 inches)81%extreme
June Weather27°C (81°F)120 mm (4.7 inches)77%extreme
July Weather28°C (83°F)94 mm (3.7 inches)72%extreme
August Weather28°C (83°F)104 mm (4.1 inches)65%extreme
September Weather26°C (79°F)81 mm (3.2 inches)63%very high
October Weather20°C (67°F)128 mm (5.0 inches)70%very high
November Weather13°C (55°F)70 mm (2.8 inches)82%high
December Weather11°C (52°F)124 mm (4.9 inches)88%moderate

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