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September Weather in Ilion, United States

Last updated: June 24, 2025

In September, the average temperature in Ilion, United States hovers around 16°C (62°F), with extremes ranging from a chilly -1°C (30°F) to a warm 31°C (89°F). Expect about 99 mm (3.9 in) of precipitation spread over 10 days, and a relatively high average humidity of 78%, making it a uniquely dynamic time in this locale.

September Temperature in Ilion

In September in Ilion, the average temperature is 16°C (62°F), with maximums reaching up to 31°C (89°F) and minimums dropping as low as -1°C (30°F). This diverse range of temperatures makes Ilion an exciting destination for travelers, offering both warm days and cooler nights to enjoy.

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

The chart illustrates September temperature patterns in Ilion, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ilion, September typically has an average temperature of 16°C (62°F), with highs reaching up to 31°C (89°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec232632445765706861513628
Data source: Temperature data for Ilion 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 Ilion

In Ilion in September, the total precipitation amount is 99 mm (3.9 in) spread over a period of 10 days.

September Precipitation Trends in Ilion

The chart displays monthly precipitation patterns in Ilion, 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 Ilion, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec951109613213412515413799174119114
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ilion

In Ilion in September, humidity is 78%. With an average temperature of 16°C (62°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities enjoyable yet slightly sticky. Travelers may find the weather pleasantly mild, though they'll appreciate having light, breathable clothing on hand to stay comfortable while exploring.

September Average Humidity in Ilion

This chart illustrates the average monthly humidity levels in Ilion, 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 Ilion is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ilion

In Ilion 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 Ilion.

Maximum UV Index Levels in Ilion for September

The chart shows the monthly maximum UV Index (UVI) for Ilion 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 Ilion typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910998632
Data source: Ilion 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 Ilion Compares to Other Months

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

This table compares monthly weather conditions in Ilion, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)95 mm (3.7 inches)90%moderate
February Weather-3°C (26°F)109 mm (4.3 inches)90%moderate
March Weather0°C (32°F)96 mm (3.8 inches)87%high
April Weather7°C (45°F)132 mm (5.2 inches)88%very high
May Weather14°C (57°F)134 mm (5.3 inches)82%very high
June Weather18°C (65°F)125 mm (4.9 inches)79%very high
July Weather21°C (70°F)154 mm (6.1 inches)78%very high
August Weather20°C (68°F)137 mm (5.4 inches)76%very high
September Weather16°C (62°F)99 mm (3.9 inches)78%very high
October Weather11°C (51°F)174 mm (6.8 inches)84%high
November Weather2°C (37°F)119 mm (4.7 inches)89%moderate
December Weather-2°C (28°F)114 mm (4.5 inches)86%low

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