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September Weather in Junction City, United States

Last updated: June 24, 2025

In Junction City, United States, the average temperature in September typically hovers around 22°C (73°F), with a minimum dipping to 5°C (41°F) and a maximum soaring to 36°C (98°F). Expect a precipitation of 71 mm (2.8 in) spread over about 7 days, accompanied by an average humidity of 71%.

September Temperature in Junction City

In September in Junction City, the average temperature is 22°C (73°F). The maximum can reach 36°C (98°F) and the minimum can be as low as 5°C (41°F). This weather makes Junction City a great destination for travelers seeking mild to warm days with potential cool evenings.

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 22°C (73°F), with highs reaching up to 36°C (98°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec323246546578817772574437
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 71 mm (2.8 in) over a span 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 71 mm (2.8 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec32298370189828612271963327
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 71%. With an average temperature of 22°C (73°F), this humidity feels like a thick, warm blanket wrapping around you, making travel feel a bit sluggish but still pleasant as long as you stay hydrated and take breaks in the shade.

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 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
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 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 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
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 Weather0°C (32°F)32 mm (1.3 inches)76%moderate
February Weather0°C (33°F)29 mm (1.1 inches)77%moderate
March Weather8°C (47°F)83 mm (3.3 inches)70%high
April Weather12°C (55°F)70 mm (2.8 inches)73%very high
May Weather19°C (66°F)189 mm (7.4 inches)82%very high
June Weather26°C (78°F)82 mm (3.2 inches)82%extreme
July Weather27°C (81°F)86 mm (3.4 inches)81%extreme
August Weather25°C (77°F)122 mm (4.8 inches)78%very high
September Weather22°C (73°F)71 mm (2.8 inches)71%very high
October Weather14°C (57°F)96 mm (3.8 inches)71%high
November Weather7°C (44°F)33 mm (1.3 inches)81%moderate
December Weather3°C (37°F)27 mm (1.1 inches)84%moderate

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