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September Weather in Centralia, United States

Last updated: June 24, 2025

In September, the average temperature in Centralia, United States hovers around 22°C (72°F), but it can swing between a brisk 6°C (42°F) and a sweltering 35°C (96°F). Expect about 59 mm (2.3 in) of precipitation over roughly 5 days, with an average humidity level of 76% adding to the overall climate experience.

September Temperature in Centralia

In September in Centralia, the average temperature is 22°C (72°F). The maximum can reach 35°C (96°F), while the minimum can drop as low as 6°C (42°F). This diverse temperature range makes Centralia an ideal destination for travelers looking to experience both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Centralia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Centralia, September typically has an average temperature of 22°C (72°F), with highs reaching up to 35°C (96°F) and lows dropping to around 6°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec313346546676797672574438
Data source: Temperature data for Centralia 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 Centralia

In Centralia in September, the precipitation amount is 59 mm (2.3 in) over the course of 5 days.

September Precipitation Trends in Centralia

The chart displays monthly precipitation patterns in Centralia, 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 Centralia, September typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec665911911418911498122591105440
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Centralia

In Centralia in September humidity is 76%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as you navigate through the thick, saturated air.

September Average Humidity in Centralia

This chart illustrates the average monthly humidity levels in Centralia, 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 Centralia is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Centralia

In Centralia 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 Centralia.

Maximum UV Index Levels in Centralia for September

The chart shows the monthly maximum UV Index (UVI) for Centralia 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 Centralia typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
Data source: Centralia 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 Centralia Compares to Other Months

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

This table compares monthly weather conditions in Centralia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)66 mm (2.6 inches)82%moderate
February Weather1°C (33°F)59 mm (2.3 inches)80%moderate
March Weather8°C (46°F)118 mm (4.7 inches)80%high
April Weather12°C (54°F)114 mm (4.5 inches)80%very high
May Weather19°C (66°F)189 mm (7.4 inches)82%very high
June Weather25°C (77°F)114 mm (4.5 inches)83%extreme
July Weather26°C (80°F)97 mm (3.8 inches)81%extreme
August Weather24°C (76°F)122 mm (4.8 inches)80%very high
September Weather22°C (72°F)59 mm (2.3 inches)76%very high
October Weather14°C (58°F)110 mm (4.3 inches)76%high
November Weather6°C (44°F)54 mm (2.1 inches)85%moderate
December Weather3°C (38°F)40 mm (1.6 inches)86%moderate

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